/**
 * xsDesignSystem Master Bundle (v2.0.0)
 * Generated by scripts/build_bundle.js
 * Governance: W3C 3-Tier Tokens · WCAG 3.0 APCA Lc >= 75 · Zero-AI ($I_{ai} == 0.0$)
 */

/* --- File: tokens.css --- */
/**
 * xsDesignSystem — Token Substrate Spec (v2.0.0 — Unified W3C 3-Tier Architecture)
 * Absorbed from: /visual-authoring, /hci-design-system, /visual-judgement-rubric, /cognitive-content-director, /physical-publication-modular-widgets
 * Strict Invariants: Spot Color <= 3.0%, APCA Lc 75+ (WCAG AAA 12:1), 8pt Grid, True Neutral Surfaces
 */

@import './tokens-publication.css';
@import './tokens-harmonies.css';
@import './themes.css';

:root {
  /* ==========================================================================
     TIER 1: PRIMITIVE TOKENS (글로벌 원형 팔레트 및 기저 수치)
     ========================================================================== */
  --xs-primitive-slate-50:  #F8FAFC;
  --xs-primitive-slate-100: #F1F5F9;
  --xs-primitive-slate-200: #E2E8F0;
  --xs-primitive-slate-300: #CBD5E1;
  --xs-primitive-slate-400: #94A3B8;
  --xs-primitive-slate-500: #64748B;
  --xs-primitive-slate-700: #334155;
  --xs-primitive-slate-800: #1E293B;
  --xs-primitive-slate-900: #0F172A;
  --xs-primitive-slate-950: #020617;

  --xs-primitive-zinc-900:  #18181B;
  --xs-primitive-zinc-950:  #09090B;

  --xs-primitive-navy-900:  #1E3A8A;
  --xs-primitive-navy-800:  #1E40AF;
  --xs-primitive-navy-50:   #EEF2FF;
  --xs-primitive-navy-200:  #C7D2FE;

  --xs-primitive-sage-700:  #15803D;
  --xs-primitive-sage-800:  #166534;
  --xs-primitive-sage-50:   #F0FDF4;
  --xs-primitive-sage-200:  #BBF7D0;

  --xs-primitive-red-600:   #DC2626;
  --xs-primitive-red-700:   #B91C1C;
  --xs-primitive-red-50:    #FEF2F2;
  --xs-primitive-red-200:   #FECACA;

  --xs-primitive-amber-600: #D97706;
  --xs-primitive-amber-50:  #FFFBEB;
  --xs-primitive-amber-200: #FDE68A;

  /* ==========================================================================
     TIER 2: SEMANTIC TOKENS (목적·의미론적 추상화 — 3% Spot & APCA Lc 75+)
     ========================================================================== */
  
  /* [Light Mode Paper & Crisp Ink] */
  --xs-bg-canvas:       #F8F9FA;                      /* 웜 미색 캔버스 */
  --xs-bg-surface:      #FFFFFF;                      /* 1단계 서피스 (ΔL = 3%) */
  --xs-bg-subtle:       var(--xs-primitive-slate-100);/* 2단계 보조 서피스 */
  --xs-bg-hover:        var(--xs-primitive-slate-200);/* 3단계 인터랙션 호버 */
  --xs-bg-active:       var(--xs-primitive-slate-300);

  --xs-border-hairline: #F0F0F0;
  --xs-border-subtle:   var(--xs-primitive-slate-200);
  --xs-border-strong:   var(--xs-primitive-slate-300);
  --xs-border-focus:    var(--xs-primitive-navy-900);

  --xs-text-ink:        var(--xs-primitive-slate-900);/* 15:1 WCAG AAA 본문 */
  --xs-text-body:       var(--xs-primitive-slate-700);/* 7:1 보조 본문 */
  --xs-text-muted:      var(--xs-primitive-slate-500);/* 4.5:1 메타데이터 */
  --xs-text-soft:       var(--xs-primitive-slate-400);/* 3:1 비활성 */
  --xs-text-inverse:    #FFFFFF;

  /* Double-Ring APCA Focus-Visible (Light Mode) */
  --xs-focus-ring-outer:  var(--xs-primitive-navy-900); /* #1E3A8A (APCA Lc 85+) */
  --xs-focus-ring-inner:  #FFFFFF;
  --xs-focus-ring-offset: 2px;
  --xs-focus-ring-width:  2px;

  /* [Dark Mode Neutral Zinc & Matte Fog (ΔL >= 3% True Neutral)] */
  --xs-dark-bg-canvas:  #0E0E10;
  --xs-dark-bg-surface: #16161A;                      /* Step 1 Surface */
  --xs-dark-bg-elevated:#1F1F24;                      /* Step 2 Surface */
  --xs-dark-border:     #2E2E35;
  --xs-dark-text-ink:   #F4F4F6;
  --xs-dark-text-muted: #8E8E98;

  /* Spot Color Economy (<= 3.0% Visual Area Strict Rule) */
  --xs-accent-navy:     var(--xs-primitive-navy-900); /* 주행동 닻 (2%) */
  --xs-accent-navy-hover: var(--xs-primitive-navy-800);
  --xs-accent-navy-light: var(--xs-primitive-navy-50);
  --xs-accent-navy-border:var(--xs-primitive-navy-200);

  --xs-accent-sage:     var(--xs-primitive-sage-700); /* 잠재명시지/성공/찬성 (1%) */
  --xs-accent-sage-hover: var(--xs-primitive-sage-800);
  --xs-accent-sage-light: var(--xs-primitive-sage-50);
  --xs-accent-sage-border:var(--xs-primitive-sage-200);

  --xs-accent-vermilion:var(--xs-primitive-red-600);  /* RPD단서/경고/반대 (0.5%) */
  --xs-accent-vermilion-hover: var(--xs-primitive-red-700);
  --xs-accent-vermilion-light: var(--xs-primitive-red-50);
  --xs-accent-vermilion-border:var(--xs-primitive-red-200);

  --xs-accent-amber:    var(--xs-primitive-amber-600);/* Stratum S3 */
  --xs-accent-amber-light: var(--xs-primitive-amber-50);
  --xs-accent-amber-border:var(--xs-primitive-amber-200);

  --xs-accent-black:    var(--xs-primitive-slate-900);/* 소버린 관문 캡슐 */
  --xs-accent-black-hover: var(--xs-primitive-slate-800);

  /* macOS 4-Semantic Feedback */
  --xs-status-critical: #FF453A;
  --xs-status-warning:  #FF9F0A;
  --xs-status-success:  #30D158;
  --xs-status-info:     #0A84FF;

  /* ==========================================================================
     TIER 3: COMPONENT & BIOMECHANICAL TOKENS (생체역학 및 컴포넌트 규격)
     ========================================================================== */
  
  /* 8pt Rhythm Grid & Spacing Scale (HCI Gestalt) */
  --xs-space-0: 0px;
  --xs-space-1: 4px;                                  /* 0.5 unit */
  --xs-space-2: 8px;                                  /* 1.0 unit (gap-sm) */
  --xs-space-3: 12px;                                 /* 1.5 unit */
  --xs-space-4: 16px;                                 /* 2.0 unit (gap-md) */
  --xs-space-5: 20px;
  --xs-space-6: 24px;                                 /* 3.0 unit (gap-lg) */
  --xs-space-8: 32px;                                 /* 4.0 unit (gap-xl) */
  --xs-space-10: 40px;
  --xs-space-12: 48px;                                /* 6.0 unit */
  --xs-space-16: 64px;                                /* 8.0 unit */

  /* Curvature Hierarchy (Affordance Standard: Static <= 2px vs Interactive 6~8px) */
  --xs-radius-static: 2px;                            /* 정적 카드/패널 */
  --xs-radius-xs: 4px;
  --xs-radius-sm: 6px;
  --xs-radius-md: 8px;                                /* 버튼 및 인터랙티브 컨트롤 */
  --xs-radius-lg: 12px;                               /* 모달 컨테이너 */
  --xs-radius-xl: 16px;
  --xs-radius-pill: 9999px;                           /* 캡슐 알약 버튼 */

  /* Stroke Hierarchy Ratio (Ratio >= 2.0) */
  --xs-stroke-grid: 0.5px;                            /* 도트/그리드 헤어라인 */
  --xs-stroke-border: 1.0px;                          /* 구조 구획선 */
  --xs-stroke-orbit: 2.5px;                           /* 인과 궤도선 (Ratio = 2.5 >= 2.0) */

  /* ==========================================================================
     Responsive Breakpoints & Container Query Anchors
     ========================================================================== */
  --xs-bp-sm: 640px;                                  /* 모바일 뷰포트 */
  --xs-bp-md: 768px;                                  /* 태블릿 세로 */
  --xs-bp-lg: 1024px;                                 /* 태블릿 가로 / 소형 랩톱 */
  --xs-bp-xl: 1280px;                                 /* 데스크톱 표준 */
  --xs-bp-2xl: 1536px;                                /* 대형 와이드 스크린 */

  /* Fitts's Law Touch Targets (Per Environment) */
  --xs-touch-target: 44px;                            /* 기본 터치 타겟 */
  --xs-touch-target-mobile: 48px;                     /* 모바일 터치 타겟 (엄지손가락 인체공학) */
  --xs-touch-target-tablet: 44px;                     /* 태블릿 터치 타겟 */
  --xs-touch-target-desktop: 40px;                    /* 마우스 데스크톱 */
  --xs-touch-action: manipulation;                    /* 300ms 더블탭 줌 딜레이 제거 */
  --xs-overscroll-behavior: contain;                  /* 부모 스크롤 체이닝 방어 */

  /* Hardware Safe-Area Insets (iOS Dynamic Island & Home Indicator) */
  --xs-safe-top:    env(safe-area-inset-top, 0px);
  --xs-safe-bottom: env(safe-area-inset-bottom, 0px);
  --xs-safe-left:   env(safe-area-inset-left, 0px);
  --xs-safe-right:  env(safe-area-inset-right, 0px);
  --xs-padding-safe-bottom: max(var(--xs-space-4), var(--xs-safe-bottom));

  /* Dynamic Viewport Units (Mobile Browser Address Bar Defense) */
  --xs-vh-dynamic: 100dvh;                            /* 가변 주소창 적응형 높이 */
  --xs-vh-small:   100svh;                            /* 주소창 확장 시 최소 높이 */
  --xs-vh-large:   100lvh;                            /* 주소창 축소 시 최대 높이 */

  /* Dynamic Fluid Spacing & Padding */
  --xs-padding-container: clamp(16px, 3vw, 40px);     /* 컨테이너 유동 여백 */
  --xs-gap-grid: clamp(12px, 2vw, 24px);              /* 그리드 유동 간격 */

  /* Viewport Dynamic CPL (Characters Per Line) */
  --xs-cpl-mobile: 24ch;                              /* 18~32자 (모바일 빠른 수직 도약) */
  --xs-cpl-slide: 38ch;                               /* 28~48자 (슬라이드 3초 직관 파악) */
  --xs-cpl-desktop: 60ch;                             /* 40~75자 (데스크톱 지속 독서) */

  /* ==========================================================================
     Relative Typography System (Root-relative rem · Modular Scale · Unitless lh)
     ========================================================================== */
  --xs-font-sans: -apple-system, BlinkMacSystemFont, "Pretendard Variable", "Pretendard", -apple-system, sans-serif;
  --xs-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "JetBrains Mono", monospace;
  --xs-font-serif: "Iowan Old Style", "Apple Garamond", "Baskerville", "Times New Roman", "Nanum Myeongjo", serif;

  /* Modular Type Scale Ratio (Minor Third = 1.200 / Perfect Fourth = 1.333) */
  --xs-type-scale-ratio: 1.200;

  /* Relative Font Sizes (Root: 1rem = 16px) */
  --xs-font-size-micro:   0.5625rem;                  /* 9px (실물 인쇄 각주 / 초미세 레이블) */
  --xs-font-size-badge:   0.625rem;                   /* 10px (배지, 태그) */
  --xs-font-size-caption: 0.6875rem;                  /* 11px (캡션, 보조 메타데이터) */
  --xs-font-size-body-sm: 0.75rem;                    /* 12px (작은 본문, 툴팁, 폼 힌트) */
  --xs-font-size-body:    0.8125rem;                  /* 13px (기본 시스템 본문) */
  --xs-font-size-title:   0.875rem;                   /* 14px (서브헤딩, 카드 타이틀) */
  --xs-font-size-h3:      0.9375rem;                  /* 15px (3차 표제) */
  --xs-font-size-h2:      1rem;                       /* 16px (2차 표제 / 기준 1.0rem) */
  --xs-font-size-h1:      1.25rem;                    /* 20px (1차 섹션 표제) */
  --xs-font-size-display: 1.75rem;                    /* 28px (대형 디스플레이 표제) */
  --xs-font-size-hero:    2.25rem;                    /* 36px (히어로 닻 표제) */

  /* Relative Fluid Typography Clamps (Mobile -> Desktop Fluid Scaling) */
  --xs-font-size-hero-fluid:    clamp(1.75rem, 3.5vw + 1rem, 2.75rem);
  --xs-font-size-display-fluid: clamp(1.4rem, 2.5vw + 0.9rem, 2.0rem);
  --xs-font-size-h1-fluid:      clamp(1.15rem, 1.5vw + 0.8rem, 1.45rem);
  --xs-font-size-h2-fluid:      clamp(0.95rem, 0.8vw + 0.75rem, 1.15rem);
  --xs-font-size-body-fluid:    clamp(0.8125rem, 0.35vw + 0.725rem, 0.875rem);

  /* Optimal Reading Characters Per Line (Rayner 1998 Saccade Research) */
  --xs-cpl-min:         45ch;                         /* 최소 가독 폭 */
  --xs-cpl-optimal:     clamp(45ch, 65ch, 75ch);      /* 최적 가독 폭 (65자 기준) */
  --xs-cpl-max:         75ch;                         /* 최대 가독 한계선 */
  --xs-measure-reading: 65ch;                         /* 1장면 표준 가독 폭 (45~75자 중심) */

  /* Data Density Control Tokens (Compact Mode) */
  --xs-density-compact:    0.75;                      /* 조밀 데이터 밀도 스케일 계수 */
  --xs-density-pad-y:      6px;                       /* 조밀 테이블/리스트 수직 패딩 */
  --xs-density-pad-x:      10px;                      /* 조밀 테이블/리스트 수평 패딩 */
  --xs-density-gap:        6px;                       /* 조밀 액션/칩 간격 */

  /* Relative Line Heights (Unitless Ratio for Optical Harmony) */
  --xs-line-height-hero:    1.15;                     /* 초대형 표제 줄높이 */
  --xs-line-height-display: 1.25;                     /* 디스플레이 표제 */
  --xs-line-height-heading: 1.35;                     /* 일반 표제 */
  --xs-line-height-title:   1.4;                      /* 서브헤딩 */
  --xs-line-height-body:    1.6;                      /* 본문 표준 (WCAG AAA 가독성) */
  --xs-line-height-tight:   1.25;                     /* 컴팩트 컨트롤 */
  --xs-line-height-loose:   1.75;                     /* 출판 서술문 */

  /* Relative Letter Spacings (em-based Optical Kerning) */
  --xs-letter-spacing-tight:   -0.025em;              /* 대형 표제 응축 */
  --xs-letter-spacing-heading: -0.018em;              /* 일반 표제 */
  --xs-letter-spacing-body:    -0.010em;              /* 한글/영문 본문 미세 자간 */
  --xs-letter-spacing-normal:   0em;                  /* 고정폭 모노스페이스 */
  --xs-letter-spacing-wide:     0.025em;              /* 올캡스 배지 및 미세 레이블 */

  /* Relative Spacing Scale (rem-based) */
  --xs-space-0:   0rem;
  --xs-space-1:   0.25rem;                            /* 4px */
  --xs-space-2:   0.5rem;                             /* 8px (기본 1 그리드 유닛) */
  --xs-space-3:   0.75rem;                            /* 12px */
  --xs-space-4:   1.0rem;                             /* 16px */
  --xs-space-5:   1.25rem;                            /* 20px */
  --xs-space-6:   1.5rem;                             /* 24px */
  --xs-space-8:   2.0rem;                             /* 32px */
  --xs-space-10:  2.5rem;                             /* 40px */
  --xs-space-12:  3.0rem;                             /* 48px */
  --xs-space-16:  4.0rem;                             /* 64px */

  /* Elevation (No Neon, Matte Shadows) */
  --xs-shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --xs-shadow-card: 0 4px 12px -2px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.02);
  --xs-shadow-spotlight: 0 20px 40px -10px rgba(15, 23, 42, 0.15);
}

/* Backward compatibility aliases */
:root {
  --bg-canvas: var(--xs-bg-canvas);
  --bg-surface: var(--xs-bg-surface);
  --bg-subtle: var(--xs-bg-subtle);
  --border-subtle: var(--xs-border-subtle);
  --border-strong: var(--xs-border-strong);
  --text-ink: var(--xs-text-ink);
  --text-body: var(--xs-text-body);
  --text-muted: var(--xs-text-muted);
  --text-soft: var(--xs-text-soft);
  --accent-navy: var(--xs-accent-navy);
  --accent-navy-hover: var(--xs-accent-navy-hover);
  --accent-navy-light: var(--xs-accent-navy-light);
  --accent-sage: var(--xs-accent-sage);
  --accent-sage-light: var(--xs-accent-sage-light);
  --accent-vermilion: var(--xs-accent-vermilion);
  --accent-vermilion-light: var(--xs-accent-vermilion-light);
  --accent-black: var(--xs-accent-black);
  --accent-black-hover: var(--xs-accent-black-hover);
  --space-1: var(--xs-space-1);
  --space-2: var(--xs-space-2);
  --space-3: var(--xs-space-3);
  --space-4: var(--xs-space-4);
  --space-6: var(--xs-space-6);
  --space-8: var(--xs-space-8);
  --space-12: var(--xs-space-12);
  --radius-sm: var(--xs-radius-sm);
  --radius-md: var(--xs-radius-md);
  --radius-lg: var(--xs-radius-lg);
  --radius-pill: var(--xs-radius-pill);
  --shadow-subtle: var(--xs-shadow-subtle);
  --shadow-card: var(--xs-shadow-card);
  --shadow-spotlight: var(--xs-shadow-spotlight);
}

/* ==========================================================================
   DARK MODE OVERRIDES & HARMONY (Data-theme & System Prefers)
   Strict Invariant: True Neutral Surfaces (ΔL >= 3%), APCA Lc 75+, Eye Comfort
   ========================================================================== */
[data-theme="dark"],
[xs-env="dark"],
.dark {
  --xs-bg-canvas:       var(--xs-dark-bg-canvas, #0E0E10);
  --xs-bg-surface:      var(--xs-dark-bg-surface, #16161A);
  --xs-bg-subtle:       var(--xs-dark-bg-elevated, #1F1F24);
  --xs-bg-hover:        #27272E;
  --xs-bg-active:       #32323B;

  --xs-border-hairline: #1E1E24;
  --xs-border-subtle:   var(--xs-dark-border, #2E2E35);
  --xs-border-strong:   #3F3F4A;
  --xs-border-focus:    #60A5FA;

  --xs-text-ink:        var(--xs-dark-text-ink, #F4F4F6);
  --xs-text-body:       #C4C4CC;
  --xs-text-muted:      var(--xs-dark-text-muted, #8E8E98);
  --xs-text-soft:       #63636E;
  --xs-text-inverse:    #0F172A;

  /* Dark Mode Spot Color Accents (Desaturated for Dark APCA & Glare Defense) */
  --xs-accent-navy:     #60A5FA;                      /* 108:1 APCA High-Contrast Blue */
  --xs-accent-navy-hover: #93C5FD;
  --xs-accent-navy-light: rgba(59, 130, 246, 0.15);  /* 은은한 네이비 배경 */
  --xs-accent-navy-border:rgba(96, 165, 250, 0.35);

  --xs-accent-sage:     #4ADE80;                      /* 다크모드 고명도 세이지 */
  --xs-accent-sage-hover: #86EFAC;
  --xs-accent-sage-light: rgba(34, 197, 94, 0.15);
  --xs-accent-sage-border:rgba(74, 222, 128, 0.35);

  --xs-accent-vermilion:#F87171;                      /* 다크모드 고명도 버밀리온 */
  --xs-accent-vermilion-hover: #FCA5A5;
  --xs-accent-vermilion-light: rgba(239, 68, 68, 0.15);
  --xs-accent-vermilion-border:rgba(248, 113, 113, 0.35);

  --xs-accent-amber:    #FBBF24;
  --xs-accent-amber-light: rgba(245, 158, 11, 0.15);
  --xs-accent-amber-border:rgba(251, 191, 36, 0.35);

  --xs-accent-black:    #F4F4F6;
  --xs-accent-black-hover: #E2E8F0;

  /* Focus Visible (Dark APCA Ring) */
  --xs-focus-ring-outer: #60A5FA;
  --xs-focus-ring-inner: #0E0E10;

  /* Elevation (Deep Matte Shadows) */
  --xs-shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --xs-shadow-card: 0 4px 12px -2px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --xs-shadow-spotlight: 0 20px 40px -10px rgba(0, 0, 0, 0.6);

  /* Aliases sync */
  --bg-canvas: var(--xs-bg-canvas);
  --bg-surface: var(--xs-bg-surface);
  --bg-subtle: var(--xs-bg-subtle);
  --border-subtle: var(--xs-border-subtle);
  --border-strong: var(--xs-border-strong);
  --text-ink: var(--xs-text-ink);
  --text-body: var(--xs-text-body);
  --text-muted: var(--xs-text-muted);
  --text-soft: var(--xs-text-soft);
  --accent-navy: var(--xs-accent-navy);
  --accent-navy-hover: var(--xs-accent-navy-hover);
  --accent-navy-light: var(--xs-accent-navy-light);
  --accent-sage: var(--xs-accent-sage);
  --accent-sage-light: var(--xs-accent-sage-light);
  --accent-vermilion: var(--xs-accent-vermilion);
  --accent-vermilion-light: var(--xs-accent-vermilion-light);

  /* Widget & Publication Dark Mode Sync */
  --xs-widget-bg: var(--xs-bg-surface);
  --xs-widget-border: var(--xs-border-subtle);
  --xs-widget-header-bg: var(--xs-bg-subtle);
  --xs-pub-surface-page: var(--xs-bg-surface);
  --xs-pub-border-rule: var(--xs-border-subtle);
  --xs-pub-text-body: var(--xs-text-body);
  --xs-pub-text-annotation: var(--xs-text-muted);
}

/* System Auto Dark Mode (When not explicitly forced to light) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([xs-env="light"]) {
    --xs-bg-canvas:       var(--xs-dark-bg-canvas, #0E0E10);
    --xs-bg-surface:      var(--xs-dark-bg-surface, #16161A);
    --xs-bg-subtle:       var(--xs-dark-bg-elevated, #1F1F24);
    --xs-bg-hover:        #27272E;
    --xs-bg-active:       #32323B;

    --xs-border-hairline: #1E1E24;
    --xs-border-subtle:   var(--xs-dark-border, #2E2E35);
    --xs-border-strong:   #3F3F4A;
    --xs-border-focus:    #60A5FA;

    --xs-text-ink:        var(--xs-dark-text-ink, #F4F4F6);
    --xs-text-body:       #C4C4CC;
    --xs-text-muted:      var(--xs-dark-text-muted, #8E8E98);
    --xs-text-soft:       #63636E;
    --xs-text-inverse:    #0F172A;

    --xs-accent-navy:     #60A5FA;
    --xs-accent-navy-hover: #93C5FD;
    --xs-accent-navy-light: rgba(59, 130, 246, 0.15);
    --xs-accent-navy-border:rgba(96, 165, 250, 0.35);

    --xs-accent-sage:     #4ADE80;
    --xs-accent-sage-hover: #86EFAC;
    --xs-accent-sage-light: rgba(34, 197, 94, 0.15);
    --xs-accent-sage-border:rgba(74, 222, 128, 0.35);

    --xs-accent-vermilion:#F87171;
    --xs-accent-vermilion-hover: #FCA5A5;
    --xs-accent-vermilion-light: rgba(239, 68, 68, 0.15);
    --xs-accent-vermilion-border:rgba(248, 113, 113, 0.35);

    --xs-accent-amber:    #FBBF24;
    --xs-accent-amber-light: rgba(245, 158, 11, 0.15);
    --xs-accent-amber-border:rgba(251, 191, 36, 0.35);

    --xs-focus-ring-outer: #60A5FA;
    --xs-focus-ring-inner: #0E0E10;

    --bg-canvas: var(--xs-bg-canvas);
    --bg-surface: var(--xs-bg-surface);
    --bg-subtle: var(--xs-bg-subtle);
    --border-subtle: var(--xs-border-subtle);
    --border-strong: var(--xs-border-strong);
    --text-ink: var(--xs-text-ink);
    --text-body: var(--xs-text-body);
    --text-muted: var(--xs-text-muted);
    --text-soft: var(--xs-text-soft);

    /* Widget & Publication Dark Mode Sync */
    --xs-widget-bg: var(--xs-bg-surface);
    --xs-widget-border: var(--xs-border-subtle);
    --xs-widget-header-bg: var(--xs-bg-subtle);
    --xs-pub-surface-page: var(--xs-bg-surface);
    --xs-pub-border-rule: var(--xs-border-subtle);
    --xs-pub-text-body: var(--xs-text-body);
    --xs-pub-text-annotation: var(--xs-text-muted);
  }
}

/* --- File: tokens-publication.css --- */
/**
 * xsDesignSystem — Physical Publication & Print Color Substrate Spec (v2.0.0)
 * W3C 3-Tier Publication Tokens: Paper Substrates, Print Inks (CMYK/Spot), Editorial Geometries, and @media print Invariants
 */

:root {
  /* ==========================================================================
     TIER 1: PUBLICATION PRIMITIVE TOKENS (물리적 지업 기질 및 잉크 원형)
     ========================================================================== */

  /* [Paper Substrates / 지업 기질] */
  --xs-pub-substrate-munken-pure:      #F7F4EE; /* 몬켄 퓨어 / 아이보리 웜 미색 (Munken Pure 120g/150g) */
  --xs-pub-substrate-munken-lynx:      #FBF9F5; /* 몬켄 링스 / 내추럴 화이트 미색 (Munken Lynx) */
  --xs-pub-substrate-woodfree-warm:    #FAF8F2; /* 미색 모조지 / 서적 본문지 (Uncoated Woodfree 80g/100g) */
  --xs-pub-substrate-woodfree-white:   #FFFFFF; /* 백상지 / 순백 비도공지 (Pure White Woodfree) */
  --xs-pub-substrate-kraft-light:      #E4D8C8; /* 천연 크라프트지 연한 톤 (Unbleached Kraft Paper) */
  --xs-pub-substrate-kraft-raw:        #CCA888; /* 내추럴 하드보드 / 소포지 (Raw Board Stock) */
  --xs-pub-substrate-hanji-warm:       #F4EFE6; /* 전통 닥종이 / 한지 결 톤 (Korean Mulberry Hanji) */
  --xs-pub-substrate-bookcloth-sand:   #EBE5DA; /* 양장본 능포 / 리넨 샌드 톤 (Linen Bookcloth) */
  --xs-pub-substrate-bookcloth-charcoal:#2B2927; /* 양장본 흑포 / 차콜 패브릭 (Charcoal Cloth) */

  /* [Print Inks & Pigments / 인쇄 잉크 및 피그먼트 (CMYK & Spot Mapping)] */
  --xs-pub-ink-rich-black:             #090B0E; /* 4도 중첩 리치 블랙 (C60 M40 Y40 K100, 깊은 먹) */
  --xs-pub-ink-pure-black:             #121314; /* 1도 단색 퓨어 블랙 (K100, 활자 전용 순수 먹) */
  --xs-pub-ink-warm-black:             #1C1917; /* 웜 블랙 / 유성 잉크 톤 (Warm Carbon Black) */
  --xs-pub-ink-indigo:                 #182B49; /* 군청 잉크 / 만년필 블루블랙 (C90 M70 Y30 K45) */
  --xs-pub-ink-vermilion-seal:         #C9381F; /* 낙관 주홍 / 인주 스팟 (C0 M85 Y90 K0) */
  --xs-pub-ink-verdigris:              #26594B; /* 송록 / 청록 잉크 (C80 M20 Y60 K35) */
  --xs-pub-ink-raw-umber:              #7A4B2A; /* 석간주 / 생황토 (C25 M60 Y85 K20) */
  --xs-pub-ink-halftone-gray:          #71717A; /* 하프톤 50% 스크린 (K50 Tint) */
  --xs-pub-ink-ghost-grid:             #E4E4E7; /* 10% 베이스라인 방안 괘선 (K10 Guide Line) */

  /* ==========================================================================
     TIER 2: PUBLICATION SEMANTIC TOKENS (출판 목적 및 조판 시맨틱 계층)
     ========================================================================== */

  /* Editorial Surfaces */
  --xs-pub-surface-page:               var(--xs-pub-substrate-munken-pure);
  --xs-pub-surface-card:               #FFFFFF;
  --xs-pub-surface-plate:              var(--xs-pub-substrate-woodfree-warm);
  --xs-pub-surface-inset:              var(--xs-pub-substrate-hanji-warm);
  --xs-pub-border-rule:                #DCD7CD;
  --xs-pub-border-heavy:               var(--xs-pub-ink-rich-black);
  --xs-pub-border-guide:               var(--xs-pub-ink-ghost-grid);

  /* Editorial Typography Colors */
  --xs-pub-text-title:                 var(--xs-pub-ink-rich-black);
  --xs-pub-text-body:                  var(--xs-pub-ink-pure-black);
  --xs-pub-text-annotation:            var(--xs-pub-ink-warm-black);
  --xs-pub-text-running-head:          var(--xs-pub-ink-halftone-gray);
  --xs-pub-text-seal:                  var(--xs-pub-ink-vermilion-seal);

  /* Physical Print Geometry & Metrics (ISO / Korean Standard Formats) */
  --xs-pub-format-crown-octavo-w:      152mm;  /* 신국판 (152 × 225 mm) */
  --xs-pub-format-crown-octavo-h:      225mm;
  --xs-pub-format-a5-w:                148mm;  /* 국판 A5 (148 × 210 mm) */
  --xs-pub-format-a5-h:                210mm;
  --xs-pub-format-b5-w:                182mm;  /* 사륙배판 B5 (182 × 257 mm) */
  --xs-pub-format-b5-h:                257mm;
  --xs-pub-format-a4-w:                210mm;  /* 국배판 A4 (210 × 297 mm) */
  --xs-pub-format-a4-h:                297mm;

  /* Print Margins & Bleed Invariants */
  --xs-pub-bleed:                      3mm;    /* 3mm 도련 여백 */
  --xs-pub-margin-inner:               22mm;   /* 안쪽 여백 (제본/스파인 여유 공간) */
  --xs-pub-margin-outer:               18mm;   /* 바깥쪽 여백 */
  --xs-pub-margin-top:                 20mm;   /* 상단 여백 (두목) */
  --xs-pub-margin-bottom:              24mm;   /* 하단 여백 (지각/판심) */
  --xs-pub-spine-unit:                 0.055mm;/* 평량 80g 기준 페이지당 두께 팩터 */

  /* Leading & Baseline Typographic Grid */
  --xs-pub-baseline-unit:              8px;    /* 8pt 인쇄 베이스라인 리듬 */
  --xs-pub-leading-tight:              1.35;   /* 표제/캡션 행간 */
  --xs-pub-leading-body:               1.65;   /* 본문 황금 행간 (CJK 가독 최적) */
  --xs-pub-leading-relaxed:            1.85;   /* 주석/해설 행간 */
  --xs-pub-cjk-tracking:               -0.03em;/* 한글 전각/반각 자간 긴밀화 */

  /* ==========================================================================
     TIER 3: COMPONENT / WIDGET TOKENS (모듈형 위젯 전용 토큰)
     ========================================================================== */
  --xs-widget-bg:                      #FFFFFF;
  --xs-widget-border:                  #E2E8F0;
  --xs-widget-radius:                  4px;    /* 인쇄 지면의 절제된 엣지 (Zero-AI) */
  --xs-widget-shadow:                  0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --xs-widget-header-bg:               #F8FAFC;
  --xs-widget-accent-stripe:           var(--xs-pub-ink-indigo);
  --xs-widget-colophon-seal-size:      48px;
  --xs-widget-swatch-size:             32px;
}

/* ==========================================================================
   PRINT MEDIA CONTRACT (@media print & @page Invariants)
   ========================================================================== */
@media print {
  @page {
    margin: 20mm 18mm 24mm 22mm;
    size: auto;
  }

  body {
    background: #FFFFFF !important;
    color: var(--xs-pub-ink-pure-black) !important;
    font-size: 10pt !important;
    line-height: var(--xs-pub-leading-body) !important;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  .xs-no-print,
  .carbon-skip-link,
  .xs-screen-only {
    display: none !important;
  }

  .xs-widget {
    break-inside: avoid;
    box-shadow: none !important;
    border: 1px solid var(--xs-pub-border-rule) !important;
    page-break-inside: avoid;
  }

  .xs-widget-colophon {
    page-break-before: always;
  }
}

/* --- File: tokens-harmonies.css --- */
/**
 * xsDesignSystem — 12 Curated Modular Color Harmonies & W3C Token Bridge (v2.1.0)
 *
 * - Coupled 1:1 with W3C 3-Tier Design Tokens (Primitive -> Semantic -> Component & Material)
 * - Apply via `data-xs-harmony="<id>"` on `:root`, `body`, `.xs-system`, or `.xs-shell`
 * - Strict Invariants: APCA Lc >= 75 (WCAG AAA 12:1+), Spot Color <= 3.0%, Zero Neon Slop ($I_{ai} == 0.0$)
 */

:root {
  /* ==========================================================================
     1. SWISS MINIMAL (스위스 모더니즘 코발트)
     ========================================================================== */
  --xs-harmony-swiss-bg-canvas:      #F8FAFC;
  --xs-harmony-swiss-bg-surface:     #FFFFFF;
  --xs-harmony-swiss-bg-subtle:      #EEF2F6;
  --xs-harmony-swiss-text-ink:       #0F172A;
  --xs-harmony-swiss-text-body:      #1E293B;
  --xs-harmony-swiss-text-muted:     #64748B;
  --xs-harmony-swiss-border:         #E2E8F0;
  --xs-harmony-swiss-border-strong:  #CBD5E1;
  --xs-harmony-swiss-spot-primary:   #2563EB;
  --xs-harmony-swiss-spot-subtle:    #EFF6FF;

  /* ==========================================================================
     2. BRAUN FUNCTIONALIST (브라운 디터 람스 기능주의)
     ========================================================================== */
  --xs-harmony-braun-bg-canvas:      #F4F4F6;
  --xs-harmony-braun-bg-surface:     #FFFFFF;
  --xs-harmony-braun-bg-subtle:      #E8E8ED;
  --xs-harmony-braun-text-ink:       #1D1D1F;
  --xs-harmony-braun-text-body:      #2C2C2E;
  --xs-harmony-braun-text-muted:     #6E6E73;
  --xs-harmony-braun-border:         #D2D2D7;
  --xs-harmony-braun-border-strong:  #AEAEB2;
  --xs-harmony-braun-spot-primary:   #EA580C;
  --xs-harmony-braun-spot-subtle:    #FFF7ED;

  /* ==========================================================================
     3. BAUHAUS PRIMARY STRUCTURE (바우하우스 구조주의)
     ========================================================================== */
  --xs-harmony-bauhaus-bg-canvas:    #FAF8F5;
  --xs-harmony-bauhaus-bg-surface:   #FFFFFF;
  --xs-harmony-bauhaus-bg-subtle:    #F0ECE3;
  --xs-harmony-bauhaus-text-ink:     #18181B;
  --xs-harmony-bauhaus-text-body:    #27272A;
  --xs-harmony-bauhaus-text-muted:   #71717A;
  --xs-harmony-bauhaus-border:       #E4E4E7;
  --xs-harmony-bauhaus-border-strong:#D4D4D8;
  --xs-harmony-bauhaus-spot-primary: #DC2626;
  --xs-harmony-bauhaus-spot-second:  #1E3A8A;

  /* ==========================================================================
     4. HAEGYUNG ATMOSPHERIC HANJI (해경 전통 닥종이 & 청록)
     ========================================================================== */
  --xs-harmony-haegyung-bg-canvas:   #F9F6F0;
  --xs-harmony-haegyung-bg-surface:  #FFFEFC;
  --xs-harmony-haegyung-bg-subtle:   #EFECE4;
  --xs-harmony-haegyung-text-ink:    #18181B;
  --xs-harmony-haegyung-text-body:   #292524;
  --xs-harmony-haegyung-text-muted:  #786B5E;
  --xs-harmony-haegyung-border:      #E2DDD5;
  --xs-harmony-haegyung-border-strong:#CFC8BC;
  --xs-harmony-haegyung-spot-primary:#134E5E;
  --xs-harmony-haegyung-spot-seal:   #B43D17;

  /* ==========================================================================
     5. EDITORIAL CLASSIC INDIGO (클래식 도서 출판 몬켄지 & 만년필 인디고)
     ========================================================================== */
  --xs-harmony-editorial-bg-canvas:  #F7F4EE;
  --xs-harmony-editorial-bg-surface: #FFFFFF;
  --xs-harmony-editorial-bg-subtle:  #ECE7DF;
  --xs-harmony-editorial-text-ink:   #090B0E;
  --xs-harmony-editorial-text-body:  #1C1917;
  --xs-harmony-editorial-text-muted: #71717A;
  --xs-harmony-editorial-border:     #DCD7CD;
  --xs-harmony-editorial-border-strong:#C7C0B3;
  --xs-harmony-editorial-spot-primary:#182B49;
  --xs-harmony-editorial-spot-seal:  #C9381F;

  /* ==========================================================================
     6. KYOTO MOSS & HINOKI (교토 이끼 정원과 편백나무 자연색)
     ========================================================================== */
  --xs-harmony-kyoto-bg-canvas:      #F4F3EE;
  --xs-harmony-kyoto-bg-surface:     #FCFBF8;
  --xs-harmony-kyoto-bg-subtle:      #E7E5DC;
  --xs-harmony-kyoto-text-ink:       #141A16;
  --xs-harmony-kyoto-text-body:      #232B25;
  --xs-harmony-kyoto-text-muted:     #5C665E;
  --xs-harmony-kyoto-border:         #D8D6CC;
  --xs-harmony-kyoto-border-strong:  #BFC0B4;
  --xs-harmony-kyoto-spot-primary:   #1E4D2B;
  --xs-harmony-kyoto-spot-subtle:    #ECFDF3;

  /* ==========================================================================
     7. NORDIC BIRCH & FJORD (노르딕 자작나무 리넨과 피오르 블루)
     ========================================================================== */
  --xs-harmony-nordic-bg-canvas:     #F6F5F2;
  --xs-harmony-nordic-bg-surface:    #FFFFFF;
  --xs-harmony-nordic-bg-subtle:     #EAE8E3;
  --xs-harmony-nordic-text-ink:      #181B20;
  --xs-harmony-nordic-text-body:     #2B303A;
  --xs-harmony-nordic-text-muted:    #646B78;
  --xs-harmony-nordic-border:        #DDDAD3;
  --xs-harmony-nordic-border-strong: #C5C1B8;
  --xs-harmony-nordic-spot-primary:  #1E3F5A;
  --xs-harmony-nordic-spot-subtle:   #F0F7FF;

  /* ==========================================================================
     8. SAHARA TRAVERTINE & TERRACOTTA (지중해 석회암과 테라코타 토기)
     ========================================================================== */
  --xs-harmony-terracotta-bg-canvas: #F7F2EB;
  --xs-harmony-terracotta-bg-surface:#FFFDF9;
  --xs-harmony-terracotta-bg-subtle: #EDE5DA;
  --xs-harmony-terracotta-text-ink:  #1C1512;
  --xs-harmony-terracotta-text-body: #332722;
  --xs-harmony-terracotta-text-muted: #786459;
  --xs-harmony-terracotta-border:    #E2D7C8;
  --xs-harmony-terracotta-border-strong:#CCBCAF;
  --xs-harmony-terracotta-spot-primary:#B83B1B;
  --xs-harmony-terracotta-spot-subtle:#FEF2F2;

  /* ==========================================================================
     9. GORYEO CELADON & PORCELAIN (고려 비색 청자와 백자 유약)
     ========================================================================== */
  --xs-harmony-celadon-bg-canvas:    #F1F5F3;
  --xs-harmony-celadon-bg-surface:   #FAFCFB;
  --xs-harmony-celadon-bg-subtle:    #E3ECE8;
  --xs-harmony-celadon-text-ink:     #111917;
  --xs-harmony-celadon-text-body:    #202E2A;
  --xs-harmony-celadon-text-muted:   #596E68;
  --xs-harmony-celadon-border:       #D3E0DA;
  --xs-harmony-celadon-border-strong:#B8CCC3;
  --xs-harmony-celadon-spot-primary: #115E59;
  --xs-harmony-celadon-spot-subtle:  #F0FDFA;

  /* ==========================================================================
     10. ALPINE GLACIER DAYLIGHT (알프스 빙하 자연광과 보로실리케이트 유리)
     ========================================================================== */
  --xs-harmony-glacier-bg-canvas:    #F0F6FA;
  --xs-harmony-glacier-bg-surface:   #FFFFFF;
  --xs-harmony-glacier-bg-subtle:    #E1EDF5;
  --xs-harmony-glacier-text-ink:     #0C1524;
  --xs-harmony-glacier-text-body:    #1E2D40;
  --xs-harmony-glacier-text-muted:   #5B708B;
  --xs-harmony-glacier-border:       #D4E2EE;
  --xs-harmony-glacier-border-strong:#B8CFE2;
  --xs-harmony-glacier-spot-primary: #1D4ED8;
  --xs-harmony-glacier-spot-subtle:  #EFF6FF;

  /* ==========================================================================
     11. TECHNICAL DARK SLATE (정밀 엔지니어링 흑연 다크)
     ========================================================================== */
  --xs-harmony-techdark-bg-canvas:   #0B0F17;
  --xs-harmony-techdark-bg-surface:  #111827;
  --xs-harmony-techdark-bg-subtle:   #080B11;
  --xs-harmony-techdark-text-ink:    #F8FAFC;
  --xs-harmony-techdark-text-body:   #E2E8F0;
  --xs-harmony-techdark-text-muted:  #94A3B8;
  --xs-harmony-techdark-border:      #1F2937;
  --xs-harmony-techdark-border-strong:#374151;
  --xs-harmony-techdark-spot-primary:#38BDF8;
  --xs-harmony-techdark-spot-subtle: #082F49;

  /* ==========================================================================
     12. OBSIDIAN VOLCANIC & AMBER (흑요석 현무암과 웜 앰버 다크)
     ========================================================================== */
  --xs-harmony-obsidian-bg-canvas:   #0E0D0B;
  --xs-harmony-obsidian-bg-surface:  #171512;
  --xs-harmony-obsidian-bg-subtle:   #090807;
  --xs-harmony-obsidian-text-ink:    #F5F2EB;
  --xs-harmony-obsidian-text-body:   #E6E1D6;
  --xs-harmony-obsidian-text-muted:  #A39B8B;
  --xs-harmony-obsidian-border:      #292520;
  --xs-harmony-obsidian-border-strong:#3D372F;
  --xs-harmony-obsidian-spot-primary:#F59E0B;
  --xs-harmony-obsidian-spot-subtle: #291D06;
}

/* ==========================================================================
   MODULAR W3C SEMANTIC TOKEN BRIDGE ([data-xs-harmony="..."])
   Applying `data-xs-harmony` to any scope (:root, body, .xs-system, .xs-shell)
   automatically rebinds Semantic & Component tokens + Glass tints.
   ========================================================================== */

[data-xs-harmony="swiss"] {
  --xs-bg-canvas: var(--xs-harmony-swiss-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-swiss-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-swiss-bg-subtle);
  --xs-text-ink: var(--xs-harmony-swiss-text-ink);
  --xs-text-body: var(--xs-harmony-swiss-text-body);
  --xs-text-muted: var(--xs-harmony-swiss-text-muted);
  --xs-border-subtle: var(--xs-harmony-swiss-border);
  --xs-border-strong: var(--xs-harmony-swiss-border-strong);
  --xs-accent-navy: var(--xs-harmony-swiss-spot-primary);
  --xs-accent-navy-light: rgba(37, 99, 235, 0.10);
  --xs-glass-regular-bg: rgba(248, 250, 252, 0.78);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.90);
}

[data-xs-harmony="braun"] {
  --xs-bg-canvas: var(--xs-harmony-braun-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-braun-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-braun-bg-subtle);
  --xs-text-ink: var(--xs-harmony-braun-text-ink);
  --xs-text-body: var(--xs-harmony-braun-text-body);
  --xs-text-muted: var(--xs-harmony-braun-text-muted);
  --xs-border-subtle: var(--xs-harmony-braun-border);
  --xs-border-strong: var(--xs-harmony-braun-border-strong);
  --xs-accent-navy: var(--xs-harmony-braun-spot-primary);
  --xs-accent-navy-light: rgba(234, 88, 12, 0.12);
  --xs-glass-regular-bg: rgba(244, 244, 246, 0.80);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.92);
}

[data-xs-harmony="bauhaus"] {
  --xs-bg-canvas: var(--xs-harmony-bauhaus-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-bauhaus-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-bauhaus-bg-subtle);
  --xs-text-ink: var(--xs-harmony-bauhaus-text-ink);
  --xs-text-body: var(--xs-harmony-bauhaus-text-body);
  --xs-text-muted: var(--xs-harmony-bauhaus-text-muted);
  --xs-border-subtle: var(--xs-harmony-bauhaus-border);
  --xs-border-strong: var(--xs-harmony-bauhaus-border-strong);
  --xs-accent-navy: var(--xs-harmony-bauhaus-spot-primary);
  --xs-accent-navy-light: rgba(220, 38, 38, 0.10);
  --xs-glass-regular-bg: rgba(250, 248, 245, 0.80);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.92);
}

[data-xs-harmony="haegyung"] {
  --xs-bg-canvas: var(--xs-harmony-haegyung-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-haegyung-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-haegyung-bg-subtle);
  --xs-text-ink: var(--xs-harmony-haegyung-text-ink);
  --xs-text-body: var(--xs-harmony-haegyung-text-body);
  --xs-text-muted: var(--xs-harmony-haegyung-text-muted);
  --xs-border-subtle: var(--xs-harmony-haegyung-border);
  --xs-border-strong: var(--xs-harmony-haegyung-border-strong);
  --xs-accent-navy: var(--xs-harmony-haegyung-spot-primary);
  --xs-accent-navy-light: rgba(19, 78, 94, 0.11);
  --xs-glass-regular-bg: rgba(249, 246, 240, 0.80);
  --xs-glass-thick-bg: rgba(255, 254, 252, 0.92);
}

[data-xs-harmony="editorial"] {
  --xs-bg-canvas: var(--xs-harmony-editorial-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-editorial-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-editorial-bg-subtle);
  --xs-text-ink: var(--xs-harmony-editorial-text-ink);
  --xs-text-body: var(--xs-harmony-editorial-text-body);
  --xs-text-muted: var(--xs-harmony-editorial-text-muted);
  --xs-border-subtle: var(--xs-harmony-editorial-border);
  --xs-border-strong: var(--xs-harmony-editorial-border-strong);
  --xs-accent-navy: var(--xs-harmony-editorial-spot-primary);
  --xs-accent-navy-light: rgba(24, 43, 73, 0.10);
  --xs-glass-regular-bg: rgba(247, 244, 238, 0.82);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.92);
}

[data-xs-harmony="kyoto"] {
  --xs-bg-canvas: var(--xs-harmony-kyoto-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-kyoto-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-kyoto-bg-subtle);
  --xs-text-ink: var(--xs-harmony-kyoto-text-ink);
  --xs-text-body: var(--xs-harmony-kyoto-text-body);
  --xs-text-muted: var(--xs-harmony-kyoto-text-muted);
  --xs-border-subtle: var(--xs-harmony-kyoto-border);
  --xs-border-strong: var(--xs-harmony-kyoto-border-strong);
  --xs-accent-navy: var(--xs-harmony-kyoto-spot-primary);
  --xs-accent-navy-light: rgba(30, 77, 43, 0.11);
  --xs-glass-regular-bg: rgba(244, 243, 238, 0.80);
  --xs-glass-thick-bg: rgba(252, 251, 248, 0.92);
}

[data-xs-harmony="nordic"] {
  --xs-bg-canvas: var(--xs-harmony-nordic-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-nordic-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-nordic-bg-subtle);
  --xs-text-ink: var(--xs-harmony-nordic-text-ink);
  --xs-text-body: var(--xs-harmony-nordic-text-body);
  --xs-text-muted: var(--xs-harmony-nordic-text-muted);
  --xs-border-subtle: var(--xs-harmony-nordic-border);
  --xs-border-strong: var(--xs-harmony-nordic-border-strong);
  --xs-accent-navy: var(--xs-harmony-nordic-spot-primary);
  --xs-accent-navy-light: rgba(30, 63, 90, 0.11);
  --xs-glass-regular-bg: rgba(246, 245, 242, 0.80);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.92);
}

[data-xs-harmony="terracotta"] {
  --xs-bg-canvas: var(--xs-harmony-terracotta-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-terracotta-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-terracotta-bg-subtle);
  --xs-text-ink: var(--xs-harmony-terracotta-text-ink);
  --xs-text-body: var(--xs-harmony-terracotta-text-body);
  --xs-text-muted: var(--xs-harmony-terracotta-text-muted);
  --xs-border-subtle: var(--xs-harmony-terracotta-border);
  --xs-border-strong: var(--xs-harmony-terracotta-border-strong);
  --xs-accent-navy: var(--xs-harmony-terracotta-spot-primary);
  --xs-accent-navy-light: rgba(184, 59, 27, 0.11);
  --xs-glass-regular-bg: rgba(247, 242, 235, 0.80);
  --xs-glass-thick-bg: rgba(255, 253, 249, 0.92);
}

[data-xs-harmony="celadon"] {
  --xs-bg-canvas: var(--xs-harmony-celadon-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-celadon-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-celadon-bg-subtle);
  --xs-text-ink: var(--xs-harmony-celadon-text-ink);
  --xs-text-body: var(--xs-harmony-celadon-text-body);
  --xs-text-muted: var(--xs-harmony-celadon-text-muted);
  --xs-border-subtle: var(--xs-harmony-celadon-border);
  --xs-border-strong: var(--xs-harmony-celadon-border-strong);
  --xs-accent-navy: var(--xs-harmony-celadon-spot-primary);
  --xs-accent-navy-light: rgba(17, 94, 89, 0.11);
  --xs-glass-regular-bg: rgba(241, 245, 243, 0.80);
  --xs-glass-thick-bg: rgba(250, 252, 251, 0.92);
}

[data-xs-harmony="glacier"] {
  --xs-bg-canvas: var(--xs-harmony-glacier-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-glacier-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-glacier-bg-subtle);
  --xs-text-ink: var(--xs-harmony-glacier-text-ink);
  --xs-text-body: var(--xs-harmony-glacier-text-body);
  --xs-text-muted: var(--xs-harmony-glacier-text-muted);
  --xs-border-subtle: var(--xs-harmony-glacier-border);
  --xs-border-strong: var(--xs-harmony-glacier-border-strong);
  --xs-accent-navy: var(--xs-harmony-glacier-spot-primary);
  --xs-accent-navy-light: rgba(29, 78, 216, 0.11);
  --xs-glass-regular-bg: rgba(240, 246, 250, 0.78);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.90);
}

[data-xs-harmony="techdark"] {
  --xs-bg-canvas: var(--xs-harmony-techdark-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-techdark-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-techdark-bg-subtle);
  --xs-text-ink: var(--xs-harmony-techdark-text-ink);
  --xs-text-body: var(--xs-harmony-techdark-text-body);
  --xs-text-muted: var(--xs-harmony-techdark-text-muted);
  --xs-border-subtle: var(--xs-harmony-techdark-border);
  --xs-border-strong: var(--xs-harmony-techdark-border-strong);
  --xs-accent-navy: var(--xs-harmony-techdark-spot-primary);
  --xs-accent-navy-light: rgba(56, 189, 248, 0.14);
  --xs-glass-regular-bg: rgba(17, 24, 39, 0.78);
  --xs-glass-thick-bg: rgba(17, 24, 39, 0.90);
  --xs-glass-chrome-bg: linear-gradient(180deg, rgba(31, 41, 55, 0.86) 0%, rgba(17, 24, 39, 0.78) 100%);
  --xs-tactile-button-surface: linear-gradient(180deg, #1F2937 0%, #111827 100%);
}

[data-xs-harmony="obsidian"] {
  --xs-bg-canvas: var(--xs-harmony-obsidian-bg-canvas);
  --xs-bg-surface: var(--xs-harmony-obsidian-bg-surface);
  --xs-bg-subtle: var(--xs-harmony-obsidian-bg-subtle);
  --xs-text-ink: var(--xs-harmony-obsidian-text-ink);
  --xs-text-body: var(--xs-harmony-obsidian-text-body);
  --xs-text-muted: var(--xs-harmony-obsidian-text-muted);
  --xs-border-subtle: var(--xs-harmony-obsidian-border);
  --xs-border-strong: var(--xs-harmony-obsidian-border-strong);
  --xs-accent-navy: var(--xs-harmony-obsidian-spot-primary);
  --xs-accent-navy-light: rgba(245, 158, 11, 0.15);
  --xs-glass-regular-bg: rgba(23, 21, 18, 0.80);
  --xs-glass-thick-bg: rgba(23, 21, 18, 0.92);
  --xs-glass-chrome-bg: linear-gradient(180deg, rgba(41, 37, 32, 0.86) 0%, rgba(23, 21, 18, 0.78) 100%);
  --xs-tactile-button-surface: linear-gradient(180deg, #292520 0%, #171512 100%);
}

/* ==========================================================================
   MODULAR CROSS-COLOR SPOT ACCENT OVERRIDES ([data-xs-spot="..."])
   Decouples primary action/spot accent from base canvas harmony while enforcing
   Spot Color Economy (<= 3.0%) and Dark-Polarity Perceptual Salience (ΔE00 >= 20).
   ========================================================================== */

[data-xs-spot="navy"] {
  --xs-accent-navy: #1E3A8A;
  --xs-accent-navy-light: rgba(30, 58, 138, 0.10);
}
[data-xs-spot="cobalt"] {
  --xs-accent-navy: #2563EB;
  --xs-accent-navy-light: rgba(37, 99, 235, 0.10);
}
[data-xs-spot="signal-orange"] {
  --xs-accent-navy: #EA580C;
  --xs-accent-navy-light: rgba(234, 88, 12, 0.12);
}
[data-xs-spot="vermilion"] {
  --xs-accent-navy: #DC2626;
  --xs-accent-navy-light: rgba(220, 38, 38, 0.10);
}
[data-xs-spot="petrol-teal"] {
  --xs-accent-navy: #134E5E;
  --xs-accent-navy-light: rgba(19, 78, 94, 0.11);
}
[data-xs-spot="celadon-jade"] {
  --xs-accent-navy: #115E59;
  --xs-accent-navy-light: rgba(17, 94, 89, 0.11);
}
[data-xs-spot="moss-green"] {
  --xs-accent-navy: #1E4D2B;
  --xs-accent-navy-light: rgba(30, 77, 43, 0.11);
}
[data-xs-spot="terracotta"] {
  --xs-accent-navy: #B83B1B;
  --xs-accent-navy-light: rgba(184, 59, 27, 0.11);
}
[data-xs-spot="amber-gold"] {
  --xs-accent-navy: #B45309;
  --xs-accent-navy-light: rgba(180, 83, 9, 0.12);
}

/* Dark-Polarity Spot Auto-Adaptation (ensures ΔE00 >= 20 against dark surfaces) */
[data-xs-harmony="techdark"][data-xs-spot="navy"],
[data-xs-harmony="obsidian"][data-xs-spot="navy"] {
  --xs-accent-navy: #38BDF8;
  --xs-accent-navy-light: rgba(56, 189, 248, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="cobalt"],
[data-xs-harmony="obsidian"][data-xs-spot="cobalt"] {
  --xs-accent-navy: #60A5FA;
  --xs-accent-navy-light: rgba(96, 165, 250, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="signal-orange"],
[data-xs-harmony="obsidian"][data-xs-spot="signal-orange"] {
  --xs-accent-navy: #FB923C;
  --xs-accent-navy-light: rgba(251, 146, 60, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="vermilion"],
[data-xs-harmony="obsidian"][data-xs-spot="vermilion"] {
  --xs-accent-navy: #F87171;
  --xs-accent-navy-light: rgba(248, 113, 113, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="petrol-teal"],
[data-xs-harmony="obsidian"][data-xs-spot="petrol-teal"] {
  --xs-accent-navy: #2DD4BF;
  --xs-accent-navy-light: rgba(45, 212, 191, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="celadon-jade"],
[data-xs-harmony="obsidian"][data-xs-spot="celadon-jade"] {
  --xs-accent-navy: #34D399;
  --xs-accent-navy-light: rgba(52, 211, 153, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="moss-green"],
[data-xs-harmony="obsidian"][data-xs-spot="moss-green"] {
  --xs-accent-navy: #4ADE80;
  --xs-accent-navy-light: rgba(74, 222, 128, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="terracotta"],
[data-xs-harmony="obsidian"][data-xs-spot="terracotta"] {
  --xs-accent-navy: #FB7185;
  --xs-accent-navy-light: rgba(251, 113, 133, 0.15);
}
[data-xs-harmony="techdark"][data-xs-spot="amber-gold"],
[data-xs-harmony="obsidian"][data-xs-spot="amber-gold"] {
  --xs-accent-navy: #F59E0B;
  --xs-accent-navy-light: rgba(245, 158, 11, 0.15);
}

/* --- File: themes.css --- */
/**
 * xsDesignSystem — Chat Workspace Theme Set
 * Reference direction: calm desktop workspace with a persistent rail,
 * generous stage, and a docked conversation surface.
 * No product branding or copied UI strings. Existing themes remain untouched.
 */

:root[data-xs-theme="chat-workspace"],
:root[data-xs-theme="chat-workspace-paper"],
.xs-chat-workspace[data-xs-theme="chat-workspace"],
.xs-chat-workspace[data-xs-theme="chat-workspace-paper"] {
  --xs-chat-canvas: #f7f7f8;
  --xs-chat-rail: #f1f1f2;
  --xs-chat-stage: #ffffff;
  --xs-chat-dock: #fbfbfc;
  --xs-chat-border: #e5e5e7;
  --xs-chat-border-strong: #d5d5d8;
  --xs-chat-ink: #202123;
  --xs-chat-body: #4a4b50;
  --xs-chat-muted: #74757b;
  --xs-chat-soft: #9b9ca2;
  --xs-chat-accent: #2f6feb;
  --xs-chat-accent-ink: #174ea6;
  --xs-chat-accent-soft: #eaf1ff;
  --xs-chat-danger: #b42318;
  --xs-chat-composer: #ffffff;
  --xs-chat-shadow-dock: 0 8px 24px rgba(32, 33, 35, 0.06);
  --xs-chat-radius-panel: 18px;
  --xs-chat-radius-control: 10px;
  --xs-chat-rail-width: 56px;
  --xs-chat-dock-width: min(38vw, 520px);
}

:root[data-xs-theme="chat-workspace-graphite"],
.xs-chat-workspace[data-xs-theme="chat-workspace-graphite"] {
  --xs-chat-canvas: #202123;
  --xs-chat-rail: #18191a;
  --xs-chat-stage: #252627;
  --xs-chat-dock: #202123;
  --xs-chat-border: #3a3b3e;
  --xs-chat-border-strong: #505156;
  --xs-chat-ink: #f2f2f3;
  --xs-chat-body: #d0d0d3;
  --xs-chat-muted: #a1a2a7;
  --xs-chat-soft: #77787d;
  --xs-chat-accent: #8ab4f8;
  --xs-chat-accent-ink: #c7dcff;
  --xs-chat-accent-soft: #293b5c;
  --xs-chat-danger: #ffb4ab;
  --xs-chat-composer: #2c2d2f;
  --xs-chat-shadow-dock: 0 8px 24px rgba(0, 0, 0, 0.24);
}

:root[data-xs-theme="chat-workspace-charcoal"],
:root[data-theme="chatgpt-dark"],
.xs-chat-workspace[data-xs-theme="chat-workspace-charcoal"] {
  --xs-chat-canvas: #17181c;
  --xs-chat-rail: #141416;
  --xs-chat-explorer: #1a1b1e;
  --xs-chat-stage: #212124;
  --xs-chat-surface-elevated: #2a2b30;
  --xs-chat-dock: #17181c;
  --xs-chat-border: #2a2b30;
  --xs-chat-border-subtle: #333438;
  --xs-chat-border-strong: #44454b;
  --xs-chat-ink: #f1f5f9;
  --xs-chat-body: #d1d5db;
  --xs-chat-muted: #9ca3af;
  --xs-chat-soft: #6b7280;
  --xs-chat-accent: #38bdf8;
  --xs-chat-accent-ink: #e0f2fe;
  --xs-chat-accent-soft: rgba(56, 189, 248, 0.15);
  --xs-chat-accent-amber: #f59e0b;
  --xs-chat-accent-emerald: #22c55e;
  --xs-chat-accent-purple: #c084fc;
  --xs-chat-danger: #ef4444;
  --xs-chat-composer: #2a2b30;
  --xs-chat-shadow-dock: 0 8px 24px rgba(0, 0, 0, 0.4);
  --xs-chat-radius-panel: 12px;
  --xs-chat-radius-control: 6px;
  --xs-chat-rail-width: 54px;
  --xs-chat-explorer-width: 240px;
  --xs-chat-dock-width: min(38vw, 520px);
}

/* Keep the family opt-in. The existing xsDesignSystem canvas remains the default. */
[data-xs-theme^="chat-workspace"],
[data-xs-theme="standard-canvas"],
[data-xs-theme="app-shell"],
[data-xs-theme="editorial-publication"],
[data-xs-theme="haegyung-hdls"] {
  color-scheme: light;
}

[data-xs-theme="chat-workspace-graphite"],
[data-xs-theme="chat-workspace-charcoal"],
[data-theme="chatgpt-dark"],
[data-xs-harmony="techdark"],
[data-xs-harmony="obsidian"] {
  color-scheme: dark;
}

/* ==========================================================================
   ORTHOGONAL THEME × COLOR HARMONY BRIDGE ([data-xs-theme][data-xs-harmony])
   Allows any Structural Theme (chat-workspace-*, app-shell, editorial-publication,
   haegyung-hdls) to combine modularly with any of the 12 Color Harmonies and
   9 Cross-Color Spot Accents without hardcoded hex collisions.
   ========================================================================== */
:root[data-xs-theme][data-xs-harmony],
[data-xs-theme][data-xs-harmony],
[data-xs-harmony] .xs-chat-workspace,
.xs-chat-workspace[data-xs-harmony] {
  --xs-chat-canvas: var(--xs-bg-canvas);
  --xs-chat-rail: var(--xs-bg-subtle);
  --xs-chat-explorer: var(--xs-bg-subtle);
  --xs-chat-stage: var(--xs-bg-surface);
  --xs-chat-surface-elevated: var(--xs-bg-surface);
  --xs-chat-dock: var(--xs-bg-canvas);
  --xs-chat-border: var(--xs-border-subtle);
  --xs-chat-border-subtle: var(--xs-border-subtle);
  --xs-chat-border-strong: var(--xs-border-strong);
  --xs-chat-ink: var(--xs-text-ink);
  --xs-chat-body: var(--xs-text-body);
  --xs-chat-muted: var(--xs-text-muted);
  --xs-chat-accent: var(--xs-accent-navy);
  --xs-chat-accent-ink: var(--xs-accent-navy);
  --xs-chat-accent-soft: var(--xs-accent-navy-light, rgba(37, 99, 235, 0.12));
  --xs-chat-composer: var(--xs-bg-surface);
}

/* --- File: components.css --- */
/**
 * xsDesignSystem — Component Library (v1.0.0)
 * Swiss Minimal & Zero-AI Governance Compliant
 * 12 Core Atomic & Molecular Components
 */

/* ==========================================================================
   0. Base Layout & Reset
   ========================================================================== */
.xs-body, body.xs-theme {
  background-color: var(--xs-bg-canvas);
  color: var(--xs-text-ink);
  font-family: var(--xs-font-sans);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  line-height: var(--xs-line-height-body);
}

.xs-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: var(--xs-space-8) var(--xs-space-5);
}

/* Grid System */
.xs-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--xs-space-6);
  margin-bottom: var(--xs-space-8);
}

.xs-col-12 { grid-column: span 12; }
.xs-col-8  { grid-column: span 8; }
.xs-col-6  { grid-column: span 6; }
.xs-col-4  { grid-column: span 4; }
.xs-col-3  { grid-column: span 3; }

@media (max-width: 1024px) {
  .xs-col-8, .xs-col-6, .xs-col-4, .xs-col-3 {
    grid-column: span 12;
  }
}

/* Header Banner */
.xs-header {
  margin-bottom: var(--xs-space-8);
  border-bottom: 1px solid var(--xs-border-subtle);
  padding-bottom: var(--xs-space-5);
}

.xs-header-title {
  font-size: var(--xs-font-size-display);
  font-weight: var(--xs-font-weight-display);
  letter-spacing: var(--xs-letter-spacing-display);
  color: var(--xs-text-ink);
  margin-bottom: var(--xs-space-2);
  display: flex;
  align-items: center;
  gap: var(--xs-space-3);
  flex-wrap: wrap;
}

.xs-header-subtitle {
  font-size: var(--xs-font-size-title);
  color: var(--xs-text-muted);
}

/* Card Container */
.xs-card {
  background: var(--xs-bg-surface);
  border: 1px solid var(--xs-border-subtle);
  border-radius: var(--xs-radius-lg);
  padding: var(--xs-space-6);
  box-shadow: var(--xs-shadow-card);
  transition: transform var(--xs-transition-base), box-shadow var(--xs-transition-base);
}

.xs-card-title {
  font-size: var(--xs-font-size-title);
  font-weight: var(--xs-font-weight-title);
  letter-spacing: var(--xs-letter-spacing-title);
  color: var(--xs-text-ink);
  margin-bottom: var(--xs-space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ==========================================================================
   1. Badges, Pills & Currency Tokens
   ========================================================================== */
.xs-token-pill {
  font-size: var(--xs-font-size-badge);
  font-weight: var(--xs-font-weight-badge);
  font-family: var(--xs-font-mono);
  padding: 2px 8px;
  background: var(--xs-bg-subtle);
  color: var(--xs-text-muted);
  border-radius: var(--xs-radius-xs);
  border: 1px solid var(--xs-border-hairline);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.xs-badge {
  font-size: var(--xs-font-size-caption);
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--xs-radius-xs);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.xs-badge-navy {
  color: var(--xs-accent-navy);
  background: var(--xs-accent-navy-light);
  border: 1px solid var(--xs-accent-navy-border);
}

.xs-badge-sage {
  color: var(--xs-accent-sage);
  background: var(--xs-accent-sage-light);
  border: 1px solid var(--xs-accent-sage-border);
}

.xs-badge-vermilion {
  color: var(--xs-accent-vermilion);
  background: var(--xs-accent-vermilion-light);
  border: 1px solid var(--xs-accent-vermilion-border);
}

.xs-badge-amber {
  color: var(--xs-accent-amber);
  background: var(--xs-accent-amber-light);
  border: 1px solid var(--xs-accent-amber-border);
}

/* Pure Korean Currency Token (GAP = 0) */
.xs-currency-pill {
  font-size: var(--xs-font-size-body);
  font-weight: 700;
  color: var(--xs-text-ink);
  background: var(--xs-bg-subtle);
  border: 1px solid var(--xs-border-subtle);
  padding: 4px 10px;
  border-radius: var(--xs-radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.xs-currency-pill strong {
  color: var(--xs-accent-navy);
  font-weight: 800;
}

/* ==========================================================================
   2. Hero Anchor Card Component
   ========================================================================== */
.xs-hero-anchor {
  background: var(--xs-bg-surface);
  border: 1px solid var(--xs-border-subtle);
  border-radius: var(--xs-radius-md);
  padding: var(--xs-space-4) var(--xs-space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--xs-space-4);
  box-shadow: var(--xs-shadow-subtle);
}

.xs-anchor-info {
  display: flex;
  flex-direction: column;
  gap: var(--xs-space-1);
}

.xs-anchor-tag-row {
  display: flex;
  align-items: center;
  gap: var(--xs-space-2);
  flex-wrap: wrap;
}

.xs-anchor-dday {
  font-size: var(--xs-font-size-caption);
  font-weight: 700;
  color: var(--xs-accent-vermilion);
}

.xs-anchor-title {
  font-size: var(--xs-font-size-h3);
  font-weight: 700;
  color: var(--xs-text-ink);
  letter-spacing: var(--xs-letter-spacing-heading, -0.018em);
}

.xs-anchor-subtext {
  font-size: var(--xs-font-size-body-sm);
  color: var(--xs-text-muted);
  line-height: var(--xs-line-height-body, 1.6);
}

/* ==========================================================================
   3. 50:50 Deliberation Box (Cognitive Decision Split)
   ========================================================================== */
.xs-deliberation-box {
  border: 1px solid var(--xs-border-subtle);
  border-radius: var(--xs-radius-md);
  padding: var(--xs-space-4);
  background: var(--xs-bg-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--xs-space-3);
}

.xs-delib-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--xs-font-size-body-sm);
  font-weight: 600;
  color: var(--xs-text-ink);
}

.xs-delib-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--xs-space-3);
}

@media (max-width: 640px) {
  .xs-delib-split { grid-template-columns: 1fr; }
}

.xs-delib-side {
  background: var(--xs-bg-surface);
  border-radius: var(--xs-radius-sm);
  padding: var(--xs-space-3);
  border: 1px solid var(--xs-border-subtle);
  font-size: var(--xs-font-size-caption);
  line-height: 1.5;
}

.xs-delib-side.for, .xs-delib-side.xs-for {
  border-top: 3px solid var(--xs-accent-sage);
}

.xs-delib-side.against, .xs-delib-side.xs-against {
  border-top: 3px solid var(--xs-accent-vermilion);
}

.xs-delib-side-title {
  font-weight: 700;
  margin-bottom: var(--xs-space-1);
}

.xs-delib-side.for .xs-delib-side-title,
.xs-delib-side.xs-for .xs-delib-side-title {
  color: var(--xs-accent-sage);
}

.xs-delib-side.against .xs-delib-side-title,
.xs-delib-side.xs-against .xs-delib-side-title {
  color: var(--xs-accent-vermilion);
}

/* ==========================================================================
   4. 3-Stratum Knowledge Chips (지식 3층 온톨로지)
   ========================================================================== */
.xs-stratum-group {
  display: flex;
  gap: var(--xs-space-2);
  flex-wrap: wrap;
}

.xs-stratum-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--xs-bg-surface);
  border: 1px solid var(--xs-border-subtle);
  border-radius: var(--xs-radius-sm);
  padding: 6px 10px;
  font-size: var(--xs-font-size-caption);
  color: var(--xs-text-body);
  font-weight: 500;
}

.xs-stratum-chip .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}

.xs-stratum-chip.s1 .dot, .xs-stratum-chip.xs-s1 .dot { background: var(--xs-accent-sage); }
.xs-stratum-chip.s2 .dot, .xs-stratum-chip.xs-s2 .dot { background: var(--xs-accent-navy); }
.xs-stratum-chip.s3 .dot, .xs-stratum-chip.xs-s3 .dot { background: var(--xs-accent-amber); }

/* ==========================================================================
   5. Buttons & Interactive Controls
   ========================================================================== */
.xs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--xs-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--xs-transition-fast);
  text-decoration: none;
  font-family: inherit;
}

.xs-btn-primary, .btn-focus, .xs-btn-focus {
  background: var(--xs-accent-navy);
  color: var(--xs-text-inverse);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--xs-radius-sm);
  cursor: pointer;
  transition: all var(--xs-transition-fast);
  font-family: inherit;
}
.xs-btn-primary:hover, .btn-focus:hover, .xs-btn-focus:hover {
  background: var(--xs-accent-navy-hover);
}

.xs-btn-secondary {
  background: var(--xs-bg-surface);
  color: var(--xs-text-body);
  border: 1px solid var(--xs-border-strong);
}
.xs-btn-secondary:hover {
  background: var(--xs-bg-subtle);
  color: var(--xs-text-ink);
}

.xs-btn-danger {
  background: var(--xs-accent-vermilion);
  color: var(--xs-text-inverse);
}
.xs-btn-danger:hover {
  background: var(--xs-accent-vermilion-hover);
}

.xs-btn-ghost {
  background: transparent;
  color: var(--xs-text-muted);
  border-color: transparent;
}
.xs-btn-ghost:hover {
  background: var(--xs-bg-subtle);
  color: var(--xs-text-ink);
}

/* Sovereign Book Gate Pill */
.xs-btn-pill, .book-btn {
  background-color: var(--xs-accent-black);
  color: var(--xs-text-inverse);
  border: none;
  border-radius: var(--xs-radius-pill);
  padding: 12px 28px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color var(--xs-transition-fast);
}
.xs-btn-pill:hover, .book-btn:hover {
  background-color: var(--xs-accent-black-hover);
}

/* Form Controls & HDLS / CDS Aliases */
.xs-input, .xs-select, .xs-textarea,
.cds-input, .cds-select, .cds-textarea, .hg-textarea {
  font-family: inherit;
  font-size: var(--xs-font-size-body);
  color: var(--xs-text-ink);
  background: var(--xs-bg-surface);
  border: 1px solid var(--xs-border-subtle);
  border-radius: var(--xs-radius-sm);
  padding: 8px 12px;
  outline: none;
  transition: border-color var(--xs-transition-fast), box-shadow var(--xs-transition-fast);
  width: 100%;
  box-sizing: border-box;
}

.xs-input:focus, .xs-select:focus, .xs-textarea:focus,
.cds-input:focus, .cds-select:focus, .cds-textarea:focus, .hg-textarea:focus {
  border-color: var(--xs-accent-navy);
  box-shadow: 0 0 0 2px var(--xs-accent-navy-light);
}

.cds-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--xs-space-1);
}

.cds-label {
  font-size: var(--xs-font-size-caption);
  font-weight: 700;
  color: var(--xs-text-muted);
  letter-spacing: var(--xs-letter-spacing-wide);
}

/* HDLS Question Switcher Atom */
.hg-atom-switcher {
  background: var(--xs-bg-subtle);
  border: 1px solid var(--xs-border-subtle);
  border-left: 3px solid var(--xs-accent-navy);
  border-radius: var(--xs-radius-sm);
  padding: var(--xs-space-3) var(--xs-space-4);
  display: flex;
  flex-direction: column;
  gap: var(--xs-space-2);
}

.hg-atom-switcher__asis {
  font-size: var(--xs-font-size-caption);
  color: var(--xs-text-muted);
  text-decoration: line-through;
  transition: opacity 0.12s ease;
}

.hg-atom-switcher__tobe {
  font-size: var(--xs-font-size-body);
  font-weight: 700;
  color: var(--xs-text-ink);
  transition: opacity 0.12s ease;
}

.hg-atom-switcher__btn {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: var(--xs-font-size-caption);
  font-weight: 600;
  color: var(--xs-accent-navy);
  background: var(--xs-accent-navy-light);
  border: 1px solid var(--xs-accent-navy-border);
  border-radius: var(--xs-radius-xs);
  cursor: pointer;
  transition: all var(--xs-transition-fast);
}

.hg-atom-switcher__btn:hover {
  background: var(--xs-accent-navy);
  color: var(--xs-text-inverse);
}

/* CDS Button Compatibility */
.cds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--xs-radius-sm);
  border: 1px solid var(--xs-border-subtle);
  background: var(--xs-bg-surface);
  color: var(--xs-text-ink);
  cursor: pointer;
  transition: all var(--xs-transition-fast);
}

.cds-btn--primary {
  background: var(--xs-accent-navy);
  color: var(--xs-text-inverse);
  border-color: var(--xs-accent-navy);
}
.cds-btn--primary:hover {
  background: var(--xs-accent-navy-hover);
}

.cds-btn--secondary {
  background: var(--xs-bg-subtle);
  color: var(--xs-text-ink);
  border-color: var(--xs-border-strong);
}
.cds-btn--secondary:hover {
  background: var(--xs-bg-hover);
}

.cds-btn--ghost {
  background: transparent;
  color: var(--xs-text-body);
  border-color: transparent;
}
.cds-btn--ghost:hover {
  background: var(--xs-bg-subtle);
  color: var(--xs-text-ink);
}

.cds-btn--danger {
  background: var(--xs-accent-vermilion);
  color: var(--xs-text-inverse);
  border-color: var(--xs-accent-vermilion);
}
.cds-btn--danger:hover {
  background: var(--xs-accent-vermilion-hover);
}

/* ==========================================================================
   6. Data Table & Verification Ledger
   ========================================================================== */
.xs-table, .carbon-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--xs-font-size-body);
  text-align: left;
}

.xs-table th, .carbon-data-table th {
  padding: 10px 14px;
  background: var(--xs-bg-subtle);
  color: var(--xs-text-muted);
  font-weight: 600;
  font-size: var(--xs-font-size-caption);
  border-bottom: 1px solid var(--xs-border-subtle);
}

.xs-table td, .carbon-data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--xs-border-subtle);
  color: var(--xs-text-ink);
}

.xs-table tr:last-child td, .carbon-data-table tr:last-child td {
  border-bottom: none;
}

.xs-table tr:hover td, .carbon-data-table tr:hover td {
  background: var(--xs-bg-subtle);
}

/* ==========================================================================
   7. Backward Compatibility Mapping Classes (vibenotes_* compatibility)
   ========================================================================== */
.hero-anchor-component { composes: xs-hero-anchor; }
.anchor-info { composes: xs-anchor-info; }
.anchor-tag-row { composes: xs-anchor-tag-row; }
.anchor-badge { composes: xs-badge xs-badge-amber; }
.anchor-dday { composes: xs-anchor-dday; }
.anchor-title { composes: xs-anchor-title; }
.anchor-subtext { composes: xs-anchor-subtext; }
.deliberation-box { composes: xs-deliberation-box; }
.delib-header { composes: xs-delib-header; }
.delib-split { composes: xs-delib-split; }
.delib-side { composes: xs-delib-side; }
.delib-side-title { composes: xs-delib-side-title; }
.stratum-group { composes: xs-stratum-group; }
.stratum-chip { composes: xs-stratum-chip; }
.currency-pill { composes: xs-currency-pill; }
.token-pill { composes: xs-token-pill; }

/* ==========================================================================
   8. Biomechanical 44x44px Touch Target Hit-Slop Extension (WCAG 2.5.8 AAA)
   ========================================================================== */
@media (pointer: coarse) {
  .carbon-btn-icon-compact,
  .carbon-tag button,
  .carbon-modal-close,
  .carbon-overflow-menu-btn,
  .carbon-accordion-header,
  .xs-btn-compact,
  .xs-badge-clickable {
    position: relative;
    min-width: 24px;
    min-height: 24px;
  }

  .carbon-btn-icon-compact::before,
  .carbon-tag button::before,
  .carbon-modal-close::before,
  .carbon-overflow-menu-btn::before,
  .xs-btn-compact::before,
  .xs-badge-clickable::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 44px;
    min-height: 44px;
    z-index: 1;
  }
}

/* ==========================================================================
   9. Multi-Environment Responsive & Container Query Adaptations (v2.0.0)
   ========================================================================== */

/* 9.1 Container Query Definitions */
.xs-container, .xs-card, .hero-anchor-component, .deliberation-box {
  container-type: inline-size;
}

/* 9.2 Hero Anchor Responsive Adaptation */
@media (max-width: 640px) {
  .hero-anchor-component, .xs-hero-anchor {
    flex-direction: column;
    align-items: stretch;
    padding: var(--xs-space-4);
    gap: var(--xs-space-3);
  }

  .anchor-actions, .xs-anchor-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: var(--xs-space-2);
  }

  .anchor-actions .carbon-btn,
  .xs-anchor-actions .carbon-btn {
    width: 100%;
    min-height: var(--xs-touch-target-mobile, 48px);
    justify-content: center;
  }
}

@container (max-width: 520px) {
  .hero-anchor-component {
    flex-direction: column;
    align-items: stretch;
  }
  .anchor-actions {
    flex-direction: column;
    width: 100%;
  }
  .anchor-actions .carbon-btn {
    width: 100%;
  }
}

/* 9.3 Deliberation Box Responsive Adaptation */
@media (max-width: 640px) {
  .deliberation-box, .xs-deliberation-box {
    grid-template-columns: 1fr !important;
    gap: var(--xs-space-3);
  }
}

@container (max-width: 500px) {
  .deliberation-box {
    grid-template-columns: 1fr !important;
  }
}

/* 9.4 Mobile Responsive Tabs Horizontal Carousel */
@media (max-width: 768px) {
  .carbon-tab-list, .xs-tab-list, .ds-nav {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    scrollbar-width: none;
    padding-bottom: 4px;
  }
  .carbon-tab-list::-webkit-scrollbar,
  .ds-nav::-webkit-scrollbar {
    display: none;
  }
  .carbon-tab-btn, .ds-nav a {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

/* 9.5 Responsive Data Tables with Touch Scroller */
.carbon-table-container, .xs-table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--xs-radius-md);
  border: 1px solid var(--xs-border-subtle);
  background: var(--xs-bg-surface);
}

@media (max-width: 640px) {
  .carbon-table th, .carbon-table td,
  .xs-table th, .xs-table td {
    padding: var(--xs-space-3) var(--xs-space-3);
    font-size: 12px;
    white-space: nowrap;
  }
}

/* 9.6 Mobile Bottom Sheet Modal Style */
@media (max-width: 640px) {
  .carbon-modal-container {
    align-items: flex-end !important;
    padding: 0 !important;
  }
  .carbon-modal-box {
    width: 100% !important;
    max-width: 100% !important;
    border-radius: 16px 16px 0 0 !important;
    padding: 20px !important;
    max-height: 85vh !important;
    overflow-y: auto !important;
    animation: xsSlideUp 0.25s cubic-bezier(0, 0, 0.2, 1) !important;
  }
}

@keyframes xsSlideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* ==========================================================================
   10. CVD (Color Vision Deficiency) Dual-Encoding Invariant (REQ-02)
   Enforces shape/icon/border dual-encoding so information is never conveyed by color alone.
   ========================================================================== */
.xs-dual-encoded {
  display: inline-flex;
  align-items: center;
  gap: var(--xs-space-1);
}

.xs-cue-marker {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: var(--xs-space-1);
}

.xs-cue-marker.rpd-danger {
  background-color: var(--xs-accent-vermilion);
  border-radius: 0; /* 네모 마커: 위험/경고 */
  transform: rotate(45deg); /* 다이아몬드 기호 */
}

.xs-cue-marker.tacit-knowledge {
  background-color: var(--xs-accent-sage);
  border-radius: 50%; /* 동그라미 마커: 지식/성공 */
}

.xs-cue-marker.attention-warning {
  background-color: var(--xs-accent-amber);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 9px solid var(--xs-accent-amber); /* 삼각 마커: 주의 */
  background: transparent;
}

/* ==========================================================================
   11. Windows High-Contrast Mode & Reduced Motion Defense (REQ-03)
   ========================================================================== */
@media (forced-colors: active) {
  .xs-book-btn,
  .xs-card,
  .xs-deliberation-box,
  .xs-deliberation-pane,
  .xs-stratum-chip,
  .xs-hero-anchor,
  .xs-currency-pill,
  .carbon-btn,
  .carbon-modal-box {
    forced-color-adjust: none;
    outline: 1.5px solid CanvasText !important;
    border: 1px solid CanvasText !important;
  }
  
  .xs-text-ink, .xs-text-body, .xs-text-muted {
    color: CanvasText !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   12. Hardware Safe-Area & Dynamic Viewport Defense (REQ-01)
   ========================================================================== */
.xs-safe-container {
  padding-top: var(--xs-safe-top);
  padding-bottom: var(--xs-padding-safe-bottom);
  padding-left: var(--xs-safe-left);
  padding-right: var(--xs-safe-right);
  box-sizing: border-box;
}

.xs-vh-screen {
  min-height: 100vh;
  min-height: var(--xs-vh-dynamic);
}

.xs-wrap-safe {
  word-break: keep-all;
  overflow-wrap: anywhere;
  min-width: 0;
}

/* ==========================================================================
   13. Physical Publication & Browser Print Pipeline (REQ-05)
   ========================================================================== */
@media print {
  body, .xs-body, body.xs-theme {
    background: #FFFFFF !important;
    color: #000000 !important;
    font-size: 10pt !important;
    line-height: 1.5 !important;
  }

  .carbon-skip-link,
  .xs-no-print,
  nav,
  .ds-nav,
  .carbon-tab-list,
  button,
  .xs-book-btn,
  .carbon-btn {
    display: none !important;
  }

  .xs-deliberation-box,
  .xs-card,
  .xs-hero-anchor,
  .xs-publication-widget,
  table,
  .carbon-table-container {
    break-inside: avoid !important;
    page-break-inside: avoid !important;
    box-shadow: none !important;
    border: 1px solid #D0D0D0 !important;
    background: #FFFFFF !important;
  }

  @page {
    margin: 15mm 20mm;
  }
}

/* ==========================================================================
   14. 1-Scene 1-Primary-Verb Action Bar & Reading Density Utilities (REQ-06)
   ========================================================================== */
.xs-scene-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-4);
  padding-bottom: var(--xs-space-4);
  margin-bottom: var(--xs-space-6);
  border-bottom: 1px solid var(--xs-border-subtle);
  flex-wrap: wrap;
}

.xs-primary-verb {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--xs-space-2);
  min-height: var(--xs-touch-target-desktop, 40px);
  padding: 8px 18px;
  background: var(--xs-accent-navy);
  color: var(--xs-text-inverse);
  font-size: var(--xs-font-size-body);
  font-weight: 700;
  border-radius: var(--xs-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 120ms ease;
}

.xs-primary-verb:hover {
  background: var(--xs-accent-navy-hover);
}

.xs-secondary-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--xs-space-2);
  flex-wrap: wrap;
}

.xs-measure-reading {
  max-width: var(--xs-measure-reading, 65ch);
  min-width: min(100%, var(--xs-cpl-min, 45ch));
  line-height: var(--xs-line-height-body, 1.6);
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.xs-density-compact {
  --xs-space-3: 0.5rem;
  --xs-space-4: 0.625rem;
  --xs-space-6: 1rem;
  font-size: var(--xs-font-size-body-sm, 0.75rem);
  line-height: var(--xs-line-height-tight, 1.25);
}

.xs-density-compact th,
.xs-density-compact td,
.xs-table.xs-density-compact th,
.xs-table.xs-density-compact td {
  padding: var(--xs-density-pad-y, 6px) var(--xs-density-pad-x, 10px);
  font-size: var(--xs-font-size-body-sm, 0.75rem);
}

/* ==========================================================================
   15. Keyboard Accessibility & Status Feedback UX (REQ-07)
   ========================================================================== */
.carbon-skip-link,
.xs-skip-link {
  position: fixed;
  top: -9999px;
  left: 16px;
  background: var(--xs-primitive-slate-900, #0F172A);
  color: #FFFFFF;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--xs-radius-xs, 4px);
  text-decoration: none;
  z-index: 9999;
  border: 2px solid #FFFFFF;
  box-shadow: var(--xs-shadow-card);
}

.carbon-skip-link:focus,
.carbon-skip-link:focus-visible,
.xs-skip-link:focus,
.xs-skip-link:focus-visible {
  top: 16px;
  outline: var(--xs-focus-ring-width, 2px) solid var(--xs-focus-ring-outer, #1E3A8A);
  outline-offset: var(--xs-focus-ring-offset, 2px);
}

.xs-kbd,
kbd.xs-kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5em;
  padding: 1px 6px;
  font-family: var(--xs-font-mono);
  font-size: var(--xs-font-size-badge, 0.625rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--xs-text-body);
  background: var(--xs-bg-subtle);
  border: 1px solid var(--xs-border-strong);
  border-bottom-width: 2px;
  border-radius: var(--xs-radius-xs, 4px);
  white-space: nowrap;
}

.xs-status-toast,
[role="status"].xs-status-toast,
[role="status"]:not(.carbon-sr-only):not(.carbon-visually-hidden) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-3);
  padding: var(--xs-space-3) var(--xs-space-4);
  background: var(--xs-bg-surface);
  color: var(--xs-text-ink);
  border: 1px solid var(--xs-border-subtle);
  border-left: 3px solid var(--xs-accent-navy);
  border-radius: var(--xs-radius-sm);
  box-shadow: var(--xs-shadow-card);
  font-size: var(--xs-font-size-body-sm);
  line-height: 1.5;
}

.xs-status-toast[data-tone="success"],
[role="status"][data-tone="success"] {
  border-left-color: var(--xs-accent-sage);
}

.xs-status-toast[data-tone="warning"],
[role="status"][data-tone="warning"] {
  border-left-color: var(--xs-accent-amber);
}

.xs-status-toast[data-tone="danger"],
.xs-status-toast[data-tone="critical"],
[role="status"][data-tone="danger"],
[role="status"][data-tone="critical"] {
  border-left-color: var(--xs-accent-vermilion);
}

/* --- File: chat-workspace.css --- */
/**
 * Chat Workspace structural components
 * Geometry: persistent rail -> readable stage -> docked conversation.
 */

.xs-chat-workspace {
  --xs-chat-content-max: 72ch;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: var(--xs-chat-rail-width) minmax(0, 1fr) var(--xs-chat-dock-width);
  background: var(--xs-chat-canvas);
  color: var(--xs-chat-ink);
  font-family: var(--xs-font-sans);
  overflow: hidden;
}

.xs-chat-workspace__rail {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--xs-space-2);
  padding: var(--xs-space-3) var(--xs-space-1);
  background: var(--xs-chat-rail);
  border-right: 1px solid var(--xs-chat-border);
}

.xs-chat-workspace__rail-group {
  display: grid;
  gap: var(--xs-space-2);
  justify-items: center;
}

.xs-chat-workspace__rail-spacer { flex: 1; }

.xs-chat-workspace__rail-button,
.xs-chat-workspace__icon-button {
  min-width: 44px;
  min-height: 44px;
  display: inline-grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: var(--xs-chat-radius-control);
  background: transparent;
  color: var(--xs-chat-muted);
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.xs-chat-workspace__rail-button:hover,
.xs-chat-workspace__rail-button[aria-current="page"],
.xs-chat-workspace__icon-button:hover {
  background: var(--xs-chat-stage);
  border-color: var(--xs-chat-border);
  color: var(--xs-chat-ink);
}

.xs-chat-workspace__rail-button:focus-visible,
.xs-chat-workspace__icon-button:focus-visible,
.xs-chat-workspace__composer-button:focus-visible,
.xs-chat-workspace__send:focus-visible {
  outline: 2px solid var(--xs-chat-accent);
  outline-offset: 2px;
}

.xs-chat-workspace__stage {
  min-width: 0;
  min-height: 100dvh;
  overflow: auto;
  background: var(--xs-chat-stage);
}

.xs-chat-workspace__stage-inner {
  width: min(100%, 960px);
  min-height: 100%;
  margin: 0 auto;
  padding: clamp(32px, 6vw, 88px) clamp(24px, 5vw, 72px);
}

.xs-chat-workspace__stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-4);
  margin-bottom: clamp(48px, 9vw, 120px);
}

.xs-chat-workspace__eyebrow {
  margin: 0 0 var(--xs-space-2);
  color: var(--xs-chat-muted);
  font-size: var(--xs-font-size-caption);
  font-weight: 700;
  letter-spacing: var(--xs-letter-spacing-wide);
  text-transform: uppercase;
}

.xs-chat-workspace__title {
  max-width: var(--xs-chat-content-max);
  margin: 0;
  color: var(--xs-chat-ink);
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.xs-chat-workspace__body {
  max-width: var(--xs-chat-content-max);
  color: var(--xs-chat-body);
  font-size: var(--xs-font-size-body-fluid);
  line-height: var(--xs-line-height-body);
}

.xs-chat-workspace__dock {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--xs-chat-dock);
  border-left: 1px solid var(--xs-chat-border);
  box-shadow: var(--xs-chat-shadow-dock);
}

.xs-chat-workspace__dock-header {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-3);
  padding: 0 var(--xs-space-4);
  border-bottom: 1px solid var(--xs-chat-border);
}

.xs-chat-workspace__dock-title {
  margin: 0;
  color: var(--xs-chat-ink);
  font-size: var(--xs-font-size-title);
  font-weight: 700;
}

.xs-chat-workspace__dock-body {
  flex: 1;
  overflow: auto;
  padding: var(--xs-space-5);
}

.xs-chat-workspace__dock-empty {
  min-height: 100%;
  display: grid;
  place-items: center;
  color: var(--xs-chat-muted);
  text-align: center;
}

.xs-chat-workspace__composer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: end;
  gap: var(--xs-space-2);
  margin: var(--xs-space-4);
  padding: var(--xs-space-2);
  background: var(--xs-chat-composer);
  border: 1px solid var(--xs-chat-border-strong);
  border-radius: var(--xs-chat-radius-panel);
}

.xs-chat-workspace__composer-input {
  width: 100%;
  min-height: 44px;
  max-height: 160px;
  resize: vertical;
  border: 0;
  background: transparent;
  color: var(--xs-chat-ink);
  font: inherit;
  line-height: 1.45;
  padding: 10px 4px;
}

.xs-chat-workspace__composer-input::placeholder { color: var(--xs-chat-soft); }
.xs-chat-workspace__composer-input:focus { outline: none; }

.xs-chat-workspace__composer-button,
.xs-chat-workspace__send {
  min-width: 44px;
  min-height: 44px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--xs-chat-muted);
  cursor: pointer;
}

.xs-chat-workspace__send {
  background: var(--xs-chat-ink);
  color: var(--xs-chat-stage);
}

/* ==========================================================================
   3-Column Architecture: Rail (54px) -> Explorer (240px) -> Fluid Stage
   ========================================================================== */
.xs-chat-workspace--3col {
  grid-template-columns: var(--xs-chat-rail-width, 54px) var(--xs-chat-explorer-width, 240px) minmax(0, 1fr);
}

.xs-chat-workspace__explorer {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--xs-chat-explorer, #1a1b1e);
  border-right: 1px solid var(--xs-chat-border, #2a2b30);
  overflow-y: auto;
}

.xs-chat-workspace__explorer-header {
  padding: var(--xs-space-3) var(--xs-space-4);
  font-size: 11px;
  font-weight: 700;
  color: var(--xs-chat-muted, #9ca3af);
  text-transform: uppercase;
  letter-spacing: var(--xs-letter-spacing-wide, 0.05em);
  border-bottom: 1px solid var(--xs-chat-border, #2a2b30);
}

.xs-chat-workspace__stream-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--xs-space-2);
}

.xs-chat-workspace__stream-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--xs-chat-radius-control, 6px);
  color: var(--xs-chat-body, #d1d5db);
  font-size: 12.5px;
  font-weight: 500;
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
  transition: background-color 140ms ease, color 140ms ease;
}

.xs-chat-workspace__stream-item:hover,
.xs-chat-workspace__stream-item[aria-current="page"] {
  background: var(--xs-chat-surface-elevated, #2a2b30);
  color: var(--xs-chat-ink, #f1f5f9);
}

/* ==========================================================================
   Sovereign Book Navigation & Action Header
   ========================================================================== */
.xs-sovereign-book-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-3);
  padding: 10px var(--xs-space-4);
  background: var(--xs-chat-stage, #212124);
  border-bottom: 1px solid var(--xs-chat-border, #2a2b30);
  backdrop-filter: blur(8px);
}

.xs-sovereign-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  background: var(--xs-chat-accent-amber, #f59e0b);
  color: #000000;
  font-size: 10px;
  font-weight: 800;
  border-radius: 3px;
  letter-spacing: 0.02em;
}

.xs-nav-tab-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--xs-chat-canvas, #17181c);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--xs-chat-border, #2a2b30);
}

.xs-nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--xs-chat-muted, #9ca3af);
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
  transition: all 120ms ease;
}

.xs-nav-tab:hover,
.xs-nav-tab[aria-current="page"],
.xs-nav-tab.active {
  background: var(--xs-chat-surface-elevated, #2a2b30);
  color: var(--xs-chat-ink, #f1f5f9);
}

.xs-nav-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 9999px;
  background: rgba(56, 189, 248, 0.2);
  color: var(--xs-chat-accent, #38bdf8);
}

/* ==========================================================================
   6-Channel External Signal Metric Cards
   ========================================================================== */
.xs-channel-metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--xs-space-3);
}

.xs-channel-metric-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
  background: var(--xs-chat-stage, #212124);
  border: 1px solid var(--xs-chat-border, #2a2b30);
  border-radius: var(--xs-chat-radius-control, 6px);
  min-height: 110px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.xs-channel-metric-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.xs-channel-metric-card__icon {
  font-size: 16px;
}

.xs-channel-metric-card__category {
  font-size: 10px;
  font-weight: 700;
  color: var(--xs-chat-muted, #9ca3af);
  text-transform: uppercase;
}

.xs-channel-metric-card__name {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--xs-chat-body, #d1d5db);
}

.xs-channel-metric-card__count {
  font-size: 26px;
  font-weight: 900;
  color: var(--xs-chat-ink, #f1f5f9);
  line-height: 1.1;
  margin: 4px 0;
}

.xs-channel-metric-card__desc {
  font-size: 10.5px;
  color: var(--xs-chat-soft, #6b7280);
}

/* ==========================================================================
   Apple Silicon UMA Memory Budget & Local Model Cards
   ========================================================================== */
.xs-uma-memory-budget {
  background: var(--xs-chat-stage, #212124);
  border: 1px solid var(--xs-chat-border, #2a2b30);
  border-radius: var(--xs-chat-radius-panel, 12px);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.xs-uma-memory-budget__bar {
  width: 100%;
  height: 12px;
  background: var(--xs-chat-surface-elevated, #2a2b30);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
}

.xs-uma-memory-budget__fill {
  height: 100%;
  background: var(--xs-chat-accent, #38bdf8);
  transition: width 300ms ease;
}

.xs-local-model-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  padding: 18px;
  background: var(--xs-chat-stage, #212124);
  border: 1px solid var(--xs-chat-border, #2a2b30);
  border-radius: var(--xs-chat-radius-panel, 12px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

@media (max-width: 1100px) {
  .xs-chat-workspace { grid-template-columns: var(--xs-chat-rail-width) minmax(0, 1fr); }
  .xs-chat-workspace--3col { grid-template-columns: var(--xs-chat-rail-width) minmax(0, 1fr); }
  .xs-chat-workspace__explorer { display: none; }
  .xs-chat-workspace__dock {
    position: fixed;
    z-index: 10;
    inset: auto var(--xs-space-4) var(--xs-space-4) calc(var(--xs-chat-rail-width) + var(--xs-space-4));
    max-height: min(70dvh, 640px);
    border: 1px solid var(--xs-chat-border);
    border-radius: var(--xs-chat-radius-panel);
  }
}

@media (max-width: 640px) {
  .xs-chat-workspace { grid-template-columns: 1fr; }
  .xs-chat-workspace--3col { grid-template-columns: 1fr; }
  .xs-chat-workspace__rail {
    position: fixed;
    z-index: 20;
    inset: auto var(--xs-space-3) var(--xs-space-3);
    flex-direction: row;
    justify-content: space-between;
    padding: var(--xs-space-1);
    border: 1px solid var(--xs-chat-border);
    border-radius: var(--xs-chat-radius-panel);
    box-shadow: var(--xs-chat-shadow-dock);
  }
  .xs-chat-workspace__rail-group { display: flex; }
  .xs-chat-workspace__rail-spacer { display: none; }
  .xs-chat-workspace__stage-inner { padding-bottom: 112px; }
  .xs-chat-workspace__dock { inset: auto var(--xs-space-3) 72px; }
}

@media (prefers-reduced-motion: reduce) {
  .xs-chat-workspace__rail-button,
  .xs-chat-workspace__icon-button,
  .xs-chat-workspace__stream-item,
  .xs-nav-tab { transition: none; }
}

@media (forced-colors: active) {
  .xs-chat-workspace__rail-button,
  .xs-chat-workspace__icon-button,
  .xs-chat-workspace__composer-button,
  .xs-chat-workspace__send,
  .xs-nav-tab,
  .xs-chat-workspace__stream-item { border: 1px solid ButtonText; }
}

/* ==========================================================================
   XS Core 4-Region AppShell Contract (Grounded in ChatGPT.app Benchmark)
   Regions: [data-xs-region="nav"] -> [data-xs-region="main"] -> [data-xs-region="aux"]
   Sub-regions: .xs-reading (48rem), .xs-wide (56rem), .xs-composer (autogrow)
   ========================================================================== */
.xs-system .xs-shell,
.xs-shell {
  --xs-shell-nav-size: 15rem;
  --xs-shell-aux-size: 20rem;
  --xs-shell-nav-track: 0px;
  --xs-shell-aux-track: 0px;
  --xs-shell-backdrop: rgba(9, 9, 11, 0.55);
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: var(--xs-shell-nav-track) minmax(0, 1fr) var(--xs-shell-aux-track);
  block-size: min(56rem, 100dvh);
  min-inline-size: 0;
  min-block-size: 0;
  padding: var(--xs-safe-top, 0px) var(--xs-safe-right, 0px) var(--xs-safe-bottom, 0px) var(--xs-safe-left, 0px);
  overflow: hidden;
  background: var(--xs-bg-canvas, #F8FAFC);
  color: var(--xs-text-ink, #0F172A);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  border-radius: var(--xs-radius-md, 8px);
}
.xs-shell[data-xs-mode="wide"][data-xs-nav="open"] { --xs-shell-nav-track: var(--xs-shell-nav-size); }
.xs-shell[data-xs-mode="wide"][data-xs-aux="open"] { --xs-shell-aux-track: var(--xs-shell-aux-size); }
.xs-shell > [data-xs-region] { min-inline-size: 0; min-block-size: 0; }
.xs-shell > [data-xs-region="nav"],
.xs-shell > [data-xs-region="aux"] {
  grid-row: 1;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: var(--xs-space-4, 16px);
  background: var(--xs-bg-surface, #FFFFFF);
}
.xs-shell > [data-xs-region="nav"] {
  grid-column: 1;
  border-inline-end: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-subtle, #F1F5F9);
}
.xs-shell > [data-xs-region="aux"] {
  grid-column: 3;
  border-inline-start: 1px solid var(--xs-border-subtle, #E2E8F0);
}
.xs-shell > [data-xs-region="main"] {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  container-name: xs-main;
  container-type: inline-size;
  background: var(--xs-bg-surface, #FFFFFF);
}
.xs-shell .xs-sidebar-link {
  display: flex;
  align-items: center;
  min-block-size: var(--xs-touch-target, 44px);
  padding: var(--xs-space-2, 8px) var(--xs-space-3, 12px);
  border-inline-start: 2px solid transparent;
  color: var(--xs-text-ink, #0F172A);
  text-decoration: none;
  border-radius: 0 var(--xs-radius-xs, 4px) var(--xs-radius-xs, 4px) 0;
}
.xs-shell .xs-sidebar-link:hover {
  background: var(--xs-bg-surface, #FFFFFF);
}
.xs-shell .xs-sidebar-link[aria-current="page"] {
  border-inline-start-color: var(--xs-accent-navy, #1E3A8A);
  background: var(--xs-bg-surface, #FFFFFF);
  font-weight: 700;
}
.xs-shell > [data-xs-region="main"] > header {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--xs-space-2, 8px);
  min-block-size: 3.25rem;
  max-block-size: 35%;
  overflow: auto;
  padding: var(--xs-space-2, 8px) var(--xs-space-4, 16px);
  border-block-end: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-surface, #FFFFFF);
}
.xs-shell-scroll {
  flex: 1 1 0;
  min-inline-size: 0;
  min-block-size: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scroll-padding-block: var(--xs-space-5, 20px);
}
.xs-shell :is(.xs-reading, .xs-wide) {
  inline-size: 100%;
  margin-inline: auto;
  padding: var(--xs-space-6, 24px);
  min-inline-size: 0;
  overflow-wrap: anywhere;
}
.xs-shell .xs-reading { max-inline-size: 48rem; }
.xs-shell .xs-wide { max-inline-size: 56rem; }
.xs-shell .xs-composer {
  flex: 0 0 auto;
  min-inline-size: 0;
  max-block-size: 45%;
  overflow: auto;
  padding: var(--xs-space-3, 12px) var(--xs-space-4, 16px);
  border-block-start: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-surface, #FFFFFF);
}
.xs-shell .xs-composer textarea[data-xs-autogrow] {
  width: 100%;
  min-block-size: 3rem;
  resize: none;
  overflow-y: auto;
  padding: 10px 12px;
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  border-radius: var(--xs-radius-sm, 6px);
  background: var(--xs-bg-canvas, #F8FAFC);
  color: var(--xs-text-ink, #0F172A);
  font-family: inherit;
  font-size: 0.875rem;
}
.xs-shell .xs-composer-content {
  max-inline-size: 48rem;
  margin-inline: auto;
  padding-inline: var(--xs-space-6, 24px);
  min-inline-size: 0;
}
.xs-shell > [data-xs-layout-backdrop] {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: var(--xs-shell-backdrop);
}
.xs-shell[data-xs-mode="narrow"] { grid-template-columns: minmax(0, 1fr); }
.xs-shell[data-xs-mode="narrow"] > [data-xs-region="main"] { grid-column: 1; }
.xs-shell[data-xs-mode="narrow"] > :is([data-xs-region="nav"], [data-xs-region="aux"]) {
  position: absolute;
  inset-block: 0;
  inline-size: min(var(--xs-shell-aux-size), calc(100% - 3rem));
  max-inline-size: calc(100% - 3rem);
  z-index: 3;
}
.xs-shell[data-xs-mode="narrow"] > [data-xs-region="nav"] {
  inset-inline-start: 0;
  inline-size: min(var(--xs-shell-nav-size), calc(100% - 3rem));
}
.xs-shell[data-xs-mode="narrow"] > [data-xs-region="aux"] { inset-inline-end: 0; }
.xs-shell [hidden] { display: none !important; }
@container xs-main (max-width: 40rem) {
  .xs-shell :is(.xs-reading, .xs-wide) { padding: var(--xs-space-4, 16px); }
  .xs-shell .xs-composer-content { padding-inline: 0; }
}

/* ==========================================================================
   APP-GRADE MICRO-RESPONSIVE CONTINUUM & INSET SHEET ARCHITECTURE (.xs-shell--app)
   6 Spatial Tiers:
   - Tier 1 (>=1440px): Rail(52px) + Nav(256px) + Inset Main + Aux(360px)
   - Tier 2 (1180..1439px): Rail(52px) + Nav(216px) + Inset Main + Aux(300px)
   - Tier 3 (960..1179px): Rail(52px) + Auto-Compact Nav + Inset Main + Aux(280px)
   - Tier 4 (768..959px): Rail(52px) + Inset Main + Slide-over Glass Aux Sheet
   - Tier 5 (480..767px): Bottom App Dock + Full Main + Bottom Sheet Aux
   - Tier 6 (<480px / Short <520px): Ultra-Compact Micro-Chrome
   ========================================================================== */
.xs-shell--app {
  --xs-app-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --xs-shell-rail-size: 52px;
  --xs-shell-nav-size: clamp(208px, 17vw, 256px);
  --xs-shell-aux-size: clamp(280px, 24vw, 360px);
  --xs-app-inset-gap: 6px;
  --xs-app-sheet-radius: 10px;
  --xs-app-header-h: 44px;
  background: var(--xs-bg-subtle, #EEF2F6);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  border-radius: 12px;
  box-shadow: 0 12px 32px -8px rgba(15, 23, 42, 0.12), 0 1px 3px rgba(15, 23, 42, 0.06);
  grid-template-columns: var(--xs-shell-rail-size) var(--xs-shell-nav-track) minmax(0, 1fr) var(--xs-shell-aux-track);
  transition: grid-template-columns 220ms var(--xs-app-ease), background-color 180ms ease;
  user-select: none;
  -webkit-user-select: none;
}

[data-theme="dark"] .xs-shell--app {
  background: #09090B;
  border-color: #27272A;
  box-shadow: 0 16px 40px -8px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.06);
}

/* 0. Persistent App Icon Rail (52px Desktop / Bottom Bar Mobile) */
.xs-shell--app > [data-xs-region="rail"] {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 10px 6px;
  background: transparent;
  z-index: 5;
}

.xs-app-rail-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
}

.xs-app-rail-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--xs-text-muted, #64748B);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, transform 100ms ease, box-shadow 140ms ease;
  position: relative;
}

.xs-app-rail-btn:hover {
  background: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-text-ink, #0F172A);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.xs-app-rail-btn:active {
  transform: scale(0.95);
}

.xs-app-rail-btn.is-active,
.xs-app-rail-btn[aria-current="page"] {
  background: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-accent-navy, #1E3A8A);
  border-color: var(--xs-border-subtle, #E2E8F0);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.xs-app-rail-btn.is-active::before,
.xs-app-rail-btn[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 9px;
  bottom: 9px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--xs-accent-navy, #1E3A8A);
}

/* 1. App Navigation Sidebar (Flush on Canvas) */
.xs-shell--app > [data-xs-region="nav"] {
  grid-column: 2;
  grid-row: 1;
  background: transparent;
  border-inline-end: none;
  padding: 10px 8px 10px 2px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

/* 2. Inset Main Stage Card (Floating Sheet on Canvas) */
.xs-shell--app > [data-xs-region="main"] {
  grid-column: 3;
  grid-row: 1;
  margin: var(--xs-app-inset-gap) var(--xs-app-inset-gap) var(--xs-app-inset-gap) 0;
  border-radius: var(--xs-app-sheet-radius);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-surface, #FFFFFF);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
  overflow: hidden;
  position: relative;
  user-select: text;
  -webkit-user-select: text;
}

.xs-shell--app[data-xs-aux="open"][data-xs-mode="wide"] > [data-xs-region="main"] {
  margin-inline-end: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-inline-end: none;
}

/* Translucent App Header Bar */
.xs-shell--app > [data-xs-region="main"] > header {
  min-block-size: var(--xs-app-header-h);
  max-block-size: var(--xs-app-header-h);
  padding: 0 12px;
  background: color-mix(in srgb, var(--xs-bg-surface, #FFFFFF) 86%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-block-end: 1px solid var(--xs-border-subtle, #E2E8F0);
  position: sticky;
  top: 0;
  z-index: 10;
  user-select: none;
}

/* Compact Native-Feel Chrome Pill Buttons */
.xs-app-chrome-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 9px;
  border-radius: 6px;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-text-body, #334155);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease, transform 80ms ease;
}

.xs-app-chrome-btn:hover {
  background: var(--xs-bg-subtle, #F1F5F9);
  color: var(--xs-text-ink, #0F172A);
  border-color: var(--xs-border-strong, #CBD5E1);
}

.xs-app-chrome-btn:active {
  transform: scale(0.97);
}

.xs-app-chrome-btn[aria-expanded="true"],
.xs-app-chrome-btn.is-active {
  background: var(--xs-accent-navy-light, rgba(30, 58, 138, 0.1));
  color: var(--xs-accent-navy, #1E3A8A);
  border-color: var(--xs-accent-navy-border, rgba(30, 58, 138, 0.3));
}

.xs-app-kbd {
  font-family: var(--xs-font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 1px 4px;
  border-radius: 3px;
  background: var(--xs-bg-subtle, #F1F5F9);
  color: var(--xs-text-muted, #64748B);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  line-height: 1.2;
}

/* 3. Floating Capsule App Composer */
.xs-shell--app .xs-composer {
  border-block-start: none;
  background: linear-gradient(to top, var(--xs-bg-surface, #FFFFFF) 70%, transparent);
  padding: 8px 16px 14px;
}

.xs-app-composer-capsule {
  max-inline-size: 48rem;
  margin-inline: auto;
  background: var(--xs-bg-canvas, #F8FAFC);
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  border-radius: 14px;
  padding: 8px 10px;
  box-shadow: 0 4px 16px -4px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.xs-app-composer-capsule:focus-within {
  background: var(--xs-bg-surface, #FFFFFF);
  border-color: var(--xs-accent-navy, #1E3A8A);
  box-shadow: 0 8px 24px -6px rgba(30, 58, 138, 0.16), 0 0 0 2px var(--xs-accent-navy-light, rgba(30, 58, 138, 0.15));
}

.xs-app-composer-capsule textarea[data-xs-autogrow] {
  border: none !important;
  background: transparent !important;
  padding: 4px 6px !important;
  min-block-size: 28px !important;
  font-size: 13.5px !important;
  line-height: 1.5 !important;
  outline: none !important;
  box-shadow: none !important;
}

.xs-app-composer-Toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 4px;
  border-top: 1px solid var(--xs-border-hairline, rgba(148, 163, 184, 0.18));
  user-select: none;
}

/* 4. Inset Auxiliary Inspector Panel */
.xs-shell--app > [data-xs-region="aux"] {
  grid-column: 4;
  grid-row: 1;
  margin: var(--xs-app-inset-gap) var(--xs-app-inset-gap) var(--xs-app-inset-gap) 0;
  border-radius: 0 var(--xs-app-sheet-radius) var(--xs-app-sheet-radius) 0;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  border-inline-start: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  user-select: text;
}

/* Interactive Drag Splitter Handle (AXSplitter) */
.xs-app-splitter {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 8px;
  cursor: col-resize;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
}

.xs-app-splitter--nav { right: -4px; }
.xs-app-splitter--aux { left: -4px; }

.xs-app-splitter::after {
  content: "";
  width: 2px;
  height: 36px;
  border-radius: 2px;
  background: transparent;
  transition: background-color 140ms ease, height 140ms ease;
}

.xs-app-splitter:hover::after,
.xs-app-splitter.is-dragging::after {
  background: var(--xs-accent-navy, #3B82F6);
  height: 64px;
}

/* ==========================================================================
   6-STAGE CONTAINER & VIEWPORT MICRO-OPTIMIZATION RULES
   ========================================================================== */

/* Container Query Stage A: Medium Main Stage (<= 720px / 45rem) */
@container xs-main (max-width: 45rem) {
  .xs-shell :is(.xs-reading, .xs-wide) {
    padding: 18px 20px;
  }
  .xs-shell .xs-composer {
    padding: 8px 12px 12px;
  }
}

/* Container Query Stage B: Compact Main Stage (<= 520px / 32.5rem) */
@container xs-main (max-width: 32.5rem) {
  .xs-shell :is(.xs-reading, .xs-wide) {
    padding: 14px 14px;
  }
  .xs-app-kbd {
    display: none;
  }
  .xs-shell > [data-xs-region="main"] > header {
    padding: 0 8px;
  }
}

/* Tier 1 (studio >= 1320px): Full 4-Column Studio */
.xs-shell--app[data-xs-tier="studio"] {
  --xs-shell-nav-size: 248px;
  --xs-shell-aux-size: 340px;
}

/* Tier 2 (compact-studio 1120px..1319px): Fluid Compact Studio */
.xs-shell--app[data-xs-tier="compact-studio"] {
  --xs-shell-nav-size: 204px;
  --xs-shell-aux-size: 296px;
}

/* Tier 3 (split 960px..1119px): Laptop Split-Screen (Compact Nav + Coexisting Aux) */
.xs-shell--app[data-xs-tier="split"] {
  --xs-shell-nav-size: 184px;
  --xs-shell-aux-size: 268px;
}

/* Tier 4: Narrow / Tablet Mode (< 960px Shell): Rail + Full Inset Main + Glass Slide-Over Sheet */
.xs-shell--app[data-xs-mode="narrow"] {
  grid-template-columns: var(--xs-shell-rail-size) minmax(0, 1fr);
}
.xs-shell--app[data-xs-mode="narrow"] > [data-xs-region="main"] {
  grid-column: 2;
  margin: var(--xs-app-inset-gap) var(--xs-app-inset-gap) var(--xs-app-inset-gap) 0;
  border-radius: var(--xs-app-sheet-radius);
  border-inline-end: 1px solid var(--xs-border-subtle, #E2E8F0);
}
.xs-shell--app[data-xs-mode="narrow"] > [data-xs-region="nav"] {
  inset-block: var(--xs-app-inset-gap);
  inset-inline-start: var(--xs-shell-rail-size);
  background: var(--xs-bg-surface, #FFFFFF);
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  border-radius: var(--xs-app-sheet-radius);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.35);
  padding: 12px;
}
.xs-shell--app[data-xs-mode="narrow"] > [data-xs-region="aux"] {
  inset-block: var(--xs-app-inset-gap);
  inset-inline-end: var(--xs-app-inset-gap);
  margin: 0;
  border-radius: var(--xs-app-sheet-radius);
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  box-shadow: -12px 0 36px -8px rgba(0, 0, 0, 0.3);
}

/* Tier 5 & 6: Mobile / Micro App Mode (data-xs-tier="mobile" | "micro" or <= 679px): Bottom Floating Glass Tab Bar */
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) {
  --xs-app-inset-gap: 0px;
  --xs-app-sheet-radius: 0px;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) 54px;
  border-radius: 16px;
}
.xs-shell--app[data-xs-tier="micro"] {
  --xs-app-header-h: 38px;
  grid-template-rows: minmax(0, 1fr) 48px;
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) > [data-xs-region="rail"] {
  grid-column: 1;
  grid-row: 2;
  flex-direction: row;
  justify-content: space-around;
  padding: 4px 12px;
  background: color-mix(in srgb, var(--xs-bg-surface, #FFFFFF) 90%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--xs-border-subtle, #E2E8F0);
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) .xs-app-rail-group {
  flex-direction: row;
  justify-content: space-around;
  width: auto;
  gap: 14px;
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) .xs-app-rail-btn.is-active::before,
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) .xs-app-rail-btn[aria-current="page"]::before {
  left: 8px;
  right: 8px;
  top: auto;
  bottom: -4px;
  width: auto;
  height: 3px;
  border-radius: 3px 3px 0 0;
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) > [data-xs-region="main"] {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  border: none;
  border-radius: 0;
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) > [data-xs-region="nav"] {
  inset-inline-start: 8px;
  inset-block: 8px 62px;
}
.xs-shell--app:is([data-xs-tier="mobile"], [data-xs-tier="micro"]) > [data-xs-region="aux"] {
  inset-inline: 8px;
  inset-block: auto 62px;
  inline-size: calc(100% - 16px);
  max-inline-size: calc(100% - 16px);
  max-block-size: 72%;
  border-radius: 14px;
}

/* Pointer Coarse Ergonomics (Touch Devices) */
@media (pointer: coarse) {
  .xs-app-chrome-btn {
    height: 38px;
    padding: 0 12px;
  }
  .xs-app-rail-btn {
    width: 44px;
    height: 44px;
  }
}

/* ==========================================================================
   APPLE HIG MATERIALS, GLASSMORPHISM & PHYSICAL TACTILITY ENGINE
   Grounded in Apple Human Interface Guidelines (macOS / iPadOS / visionOS):
   - 5 Translucent Material Grades: UltraThin, Thin, Regular, Thick, Chrome
   - Concentric Curvature Invariant: R_inner = max(0, R_outer - inset_gap)
   - Overhead Studio Specular Rim Lighting (1px top catchlight + contact occlusion)
   - SVG Fractal-Noise Micro-Grain Texture (Bead-Blasted Titanium, Frosted Glass,
     Glazed Ceramic, 120g/m² Cotton Paper) with APCA Lc >= 75 & Spot <= 3.0%
   ========================================================================== */

:root {
  /* ==========================================================================
     PROCEDURAL NATURAL & ORGANIC GRAPHICAL TEXTURES (0 Network Requests)
     - Anisotropic SVG feTurbulence + feDiffuseLighting surface relief
     ========================================================================== */
  /* 1. Fine Mineral / Studio Grain */
  --xs-tactile-grain-svg: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.88' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.038'/%3E%3C/svg%3E");

  /* 2. Mulberry Hanji (전통 닥종이 한지 — 긴 식물성 섬유결 + 확산광 부조) */
  --xs-tex-hanji-svg: url("data:image/svg+xml,%3Csvg viewBox='0 0 240 240' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='h'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.035 0.16' numOctaves='4' seed='7' stitchTiles='stitch' result='noise'/%3E%3CfeDiffuseLighting in='noise' lighting-color='%23ffffff' surfaceScale='1.4'%3E%3CfeDistantLight azimuth='135' elevation='52'/%3E%3C/feDiffuseLighting%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23h)' opacity='0.065'/%3E%3C/svg%3E");

  /* 3. Woven Natural Linen (천연 리넨 직조 — 날실·씨실 교차 직물 질감) */
  --xs-tex-linen-svg: url("data:image/svg+xml,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='l'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.55 0.55' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23l)' opacity='0.035'/%3E%3C/svg%3E");

  /* 4. Hinoki & Ash Timber Grain (편백·애쉬 원목 — 이방성 나뭇결) */
  --xs-tex-timber-svg: url("data:image/svg+xml,%3Csvg viewBox='0 0 320 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='w'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.012 0.24' numOctaves='4' seed='12' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23w)' opacity='0.055'/%3E%3C/svg%3E");

  /* 5. Honed Travertine & Basalt Stone (트래버틴 석회암·현무암 — 퇴적 기공 부조) */
  --xs-tex-travertine-svg: url("data:image/svg+xml,%3Csvg viewBox='0 0 220 220' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='s'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.08 0.035' numOctaves='4' seed='3' stitchTiles='stitch' result='stone'/%3E%3CfeDiffuseLighting in='stone' lighting-color='%23ffffff' surfaceScale='1.6'%3E%3CfeDistantLight azimuth='125' elevation='46'/%3E%3C/feDiffuseLighting%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23s)' opacity='0.06'/%3E%3C/svg%3E");

  /* ==========================================================================
     INCIDENT LIGHT & DIRECTIONAL SHADOW PHYSICS (빛의 입사각·색온도·그림자)
     ========================================================================== */
  --xs-light-x: 20%;
  --xs-light-y: 12%;
  --xs-cast-x: 0px;
  --xs-cast-y: 10px;
  --xs-light-glow: rgba(255, 252, 245, 0.72);
  --xs-light-ambient: rgba(255, 255, 255, 0.35);
  --xs-shadow-penumbra: rgba(15, 23, 42, 0.09);

  /* Apple HIG Specular Rim & Elevation Tokens (Light Mode) */
  --xs-specular-rim-top: inset 0 1px 0 0 rgba(255, 255, 255, 0.88);
  --xs-specular-rim-ring: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
  --xs-tactile-bevel-shadow:
    calc(var(--xs-cast-x) * 0.25) calc(var(--xs-cast-y) * 0.25) 3px rgba(15, 23, 42, 0.05),
    var(--xs-cast-x) var(--xs-cast-y) 24px -6px var(--xs-shadow-penumbra),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.92),
    inset 0 -1px 0 0 rgba(15, 23, 42, 0.04);
  --xs-tactile-recessed-well:
    inset 0 1.5px 3px rgba(15, 23, 42, 0.09),
    inset 0 0 0 1px rgba(15, 23, 42, 0.06),
    0 1px 0 rgba(255, 255, 255, 0.8);
  --xs-tactile-button-surface: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  --xs-tactile-button-shadow:
    0 1px 2px rgba(15, 23, 42, 0.08),
    0 0 0 1px rgba(15, 23, 42, 0.09),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.95);
  --xs-tactile-keycap-shadow:
    0 1.5px 0 0 #CBD5E1,
    0 2px 3px rgba(15, 23, 42, 0.12),
    inset 0 1px 0 0 #FFFFFF;

  /* Apple HIG 5-Grade Translucent Glass Surfaces (Light) */
  --xs-glass-ultrathin-bg: rgba(255, 255, 255, 0.52);
  --xs-glass-thin-bg: rgba(255, 255, 255, 0.68);
  --xs-glass-regular-bg: rgba(248, 250, 252, 0.78);
  --xs-glass-thick-bg: rgba(255, 255, 255, 0.90);
  --xs-glass-chrome-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.86) 0%, rgba(241, 245, 249, 0.78) 100%);
}

[data-theme="dark"] {
  --xs-specular-rim-top: inset 0 1px 0 0 rgba(255, 255, 255, 0.16);
  --xs-specular-rim-ring: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  --xs-tactile-bevel-shadow:
    0 2px 4px rgba(0, 0, 0, 0.4),
    0 14px 32px -8px rgba(0, 0, 0, 0.65),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.12),
    inset 0 -1px 0 0 rgba(0, 0, 0, 0.5);
  --xs-tactile-recessed-well:
    inset 0 2px 4px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(0, 0, 0, 0.45),
    0 1px 0 rgba(255, 255, 255, 0.06);
  --xs-tactile-button-surface: linear-gradient(180deg, #27272A 0%, #1C1C1F 100%);
  --xs-tactile-button-shadow:
    0 1px 3px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.15);
  --xs-tactile-keycap-shadow:
    0 1.5px 0 0 #09090B,
    0 2px 4px rgba(0, 0, 0, 0.6),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.14);

  /* Apple HIG 5-Grade Translucent Glass Surfaces (Dark) */
  --xs-glass-ultrathin-bg: rgba(24, 24, 27, 0.48);
  --xs-glass-thin-bg: rgba(24, 24, 27, 0.64);
  --xs-glass-regular-bg: rgba(24, 24, 27, 0.76);
  --xs-glass-thick-bg: rgba(24, 24, 27, 0.88);
  --xs-glass-chrome-bg: linear-gradient(180deg, rgba(39, 39, 42, 0.84) 0%, rgba(24, 24, 27, 0.76) 100%);
}

/* 1. Apple HIG 5-Grade Glassmorphism Utility Classes */
.xs-glass-ultrathin {
  background: var(--xs-glass-ultrathin-bg);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
  box-shadow: var(--xs-specular-rim-top), var(--xs-specular-rim-ring);
}

.xs-glass-thin {
  background: var(--xs-glass-thin-bg);
  backdrop-filter: blur(16px) saturate(175%);
  -webkit-backdrop-filter: blur(16px) saturate(175%);
  box-shadow: var(--xs-specular-rim-top), var(--xs-specular-rim-ring), 0 4px 16px -4px rgba(15, 23, 42, 0.08);
}

.xs-glass-regular {
  background: var(--xs-glass-regular-bg);
  backdrop-filter: blur(24px) saturate(185%);
  -webkit-backdrop-filter: blur(24px) saturate(185%);
  box-shadow: var(--xs-specular-rim-top), var(--xs-specular-rim-ring), 0 8px 28px -6px rgba(15, 23, 42, 0.12);
}

.xs-glass-thick {
  background: var(--xs-glass-thick-bg);
  backdrop-filter: blur(36px) saturate(195%);
  -webkit-backdrop-filter: blur(36px) saturate(195%);
  box-shadow: var(--xs-specular-rim-top), var(--xs-specular-rim-ring), 0 16px 40px -8px rgba(15, 23, 42, 0.18);
}

.xs-glass-chrome {
  background: var(--xs-glass-chrome-bg);
  backdrop-filter: blur(20px) saturate(180%) contrast(103%);
  -webkit-backdrop-filter: blur(20px) saturate(180%) contrast(103%);
  box-shadow: var(--xs-specular-rim-top);
}

/* 2. Physical Tactility Upgrade for .xs-shell--app */
.xs-shell--app {
  --xs-app-outer-radius: 16px;
  --xs-app-inset-gap: 6px;
  /* Concentric Curvature Law: R_inner = 16px - 6px = 10px */
  --xs-app-sheet-radius: 10px;
  border-radius: var(--xs-app-outer-radius);
  background-image:
    var(--xs-tactile-grain-svg),
    linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(226, 232, 240, 0.35) 100%);
  box-shadow:
    0 20px 48px -12px rgba(15, 23, 42, 0.16),
    0 2px 6px -1px rgba(15, 23, 42, 0.08),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.85),
    inset 0 0 0 1px rgba(15, 23, 42, 0.06);
}

[data-theme="dark"] .xs-shell--app {
  background-image:
    var(--xs-tactile-grain-svg),
    linear-gradient(180deg, rgba(39, 39, 42, 0.45) 0%, rgba(9, 9, 11, 0.85) 100%);
  box-shadow:
    0 24px 56px -12px rgba(0, 0, 0, 0.75),
    0 4px 12px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.14),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

/* 3. 4 Curated Physical Material Presets on .xs-shell--app[data-xs-material="..."] */

/* Preset A: Frosted Glass (visionOS / macOS Translucent Depth) */
.xs-shell--app[data-xs-material="glass"] {
  background-color: rgba(226, 232, 240, 0.55);
  background-image:
    var(--xs-tactile-grain-svg),
    radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.75) 0%, transparent 55%),
    radial-gradient(circle at 85% 88%, rgba(203, 213, 225, 0.5) 0%, transparent 60%);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
}
.xs-shell--app[data-xs-material="glass"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="glass"] > [data-xs-region="aux"] {
  background: var(--xs-glass-regular-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow: var(--xs-tactile-bevel-shadow);
}
[data-theme="dark"] .xs-shell--app[data-xs-material="glass"] {
  background-color: rgba(15, 17, 23, 0.72);
  background-image:
    var(--xs-tactile-grain-svg),
    radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.08) 0%, transparent 55%),
    radial-gradient(circle at 85% 88%, rgba(30, 58, 138, 0.12) 0%, transparent 60%);
}

/* Preset B: Bead-Blasted Titanium (Apple Pro Hardware Chassis) */
.xs-shell--app[data-xs-material="titanium"] {
  background-color: #E4E6EB;
  background-image:
    var(--xs-tactile-grain-svg),
    linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(203, 213, 225, 0.25) 50%, rgba(148, 163, 184, 0.2) 100%);
  border-color: #CBD5E1;
}
.xs-shell--app[data-xs-material="titanium"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="titanium"] > [data-xs-region="aux"] {
  background-color: #F8FAFC;
  background-image: var(--xs-tactile-grain-svg);
  box-shadow:
    0 2px 6px rgba(15, 23, 42, 0.08),
    inset 0 1px 0 0 #FFFFFF,
    inset 0 0 0 1px rgba(15, 23, 42, 0.05);
}
[data-theme="dark"] .xs-shell--app[data-xs-material="titanium"] {
  background-color: #18181B;
  background-image:
    var(--xs-tactile-grain-svg),
    linear-gradient(135deg, rgba(63, 63, 70, 0.45) 0%, rgba(24, 24, 27, 0.8) 55%, rgba(9, 9, 11, 0.95) 100%);
  border-color: #3F3F46;
}
[data-theme="dark"] .xs-shell--app[data-xs-material="titanium"] > [data-xs-region="main"],
[data-theme="dark"] .xs-shell--app[data-xs-material="titanium"] > [data-xs-region="aux"] {
  background-color: #121215;
  background-image: var(--xs-tactile-grain-svg);
}

/* Preset C: Glazed Studio Ceramic (Warm Alabaster & Matte Stone) */
.xs-shell--app[data-xs-material="ceramic"] {
  background-color: #EFECE6;
  background-image:
    var(--xs-tactile-grain-svg),
    linear-gradient(180deg, rgba(255, 255, 255, 0.65) 0%, rgba(231, 227, 218, 0.5) 100%);
  border-color: #DCD7CD;
}
.xs-shell--app[data-xs-material="ceramic"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="ceramic"] > [data-xs-region="aux"] {
  background-color: #FCFBF9;
  box-shadow:
    0 2px 8px rgba(28, 25, 23, 0.06),
    inset 0 1px 0 0 #FFFFFF;
}
[data-theme="dark"] .xs-shell--app[data-xs-material="ceramic"] {
  background-color: #171614;
  border-color: #292724;
}
[data-theme="dark"] .xs-shell--app[data-xs-material="ceramic"] > [data-xs-region="main"],
[data-theme="dark"] .xs-shell--app[data-xs-material="ceramic"] > [data-xs-region="aux"] {
  background-color: #1F1E1B;
}

/* Preset D: Archival Cotton Paper & Mulberry Hanji (전통 닥종이 한지 / 120g/m² 코튼지) */
.xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) {
  background-color: var(--xs-bg-subtle, #EAE5DC);
  background-image:
    var(--xs-tex-hanji-svg),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), var(--xs-light-glow) 0%, transparent 65%);
  border-color: var(--xs-border-subtle, #D6D1C7);
}
.xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) > [data-xs-region="main"],
.xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) > [data-xs-region="aux"] {
  background-color: var(--xs-bg-surface, #FAF7F2);
  background-image:
    var(--xs-tex-hanji-svg),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), rgba(255, 255, 255, 0.55) 0%, transparent 70%);
  box-shadow: var(--xs-tactile-bevel-shadow);
}
[data-theme="dark"] .xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) {
  background-color: #141311;
  border-color: #262420;
}
[data-theme="dark"] .xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) > [data-xs-region="main"],
[data-theme="dark"] .xs-shell--app:is([data-xs-material="paper"], [data-xs-material="hanji"]) > [data-xs-region="aux"] {
  background-color: #1C1A17;
  background-image: var(--xs-tex-hanji-svg);
}

/* Preset E: Woven Natural Linen (천연 리넨 직조 패브릭 — 날실·씨실 교차 결) */
.xs-shell--app[data-xs-material="linen"] {
  background-color: var(--xs-bg-subtle, #EAE7E0);
  background-image:
    var(--xs-tex-linen-svg),
    repeating-linear-gradient(0deg, rgba(15, 23, 42, 0.018) 0px, rgba(15, 23, 42, 0.018) 1px, transparent 1px, transparent 3px),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, 0.018) 0px, rgba(15, 23, 42, 0.018) 1px, transparent 1px, transparent 3px),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), var(--xs-light-glow) 0%, transparent 65%);
}
.xs-shell--app[data-xs-material="linen"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="linen"] > [data-xs-region="aux"] {
  background-color: var(--xs-bg-surface, #FDFCFB);
  background-image:
    var(--xs-tex-linen-svg),
    repeating-linear-gradient(0deg, rgba(15, 23, 42, 0.01) 0px, rgba(15, 23, 42, 0.01) 1px, transparent 1px, transparent 4px),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, 0.01) 0px, rgba(15, 23, 42, 0.01) 1px, transparent 1px, transparent 4px);
  box-shadow: var(--xs-tactile-bevel-shadow);
}

/* Preset F: Hinoki & Ash Timber Grain (편백·애쉬 원목 — 이방성 나뭇결 + 온기 있는 반사광) */
.xs-shell--app[data-xs-material="timber"] {
  background-color: var(--xs-bg-subtle, #E8E4DA);
  background-image:
    var(--xs-tex-timber-svg),
    linear-gradient(108deg, rgba(255, 250, 240, 0.55) 0%, rgba(214, 204, 186, 0.25) 52%, rgba(255, 252, 245, 0.45) 100%),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), var(--xs-light-glow) 0%, transparent 65%);
}
.xs-shell--app[data-xs-material="timber"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="timber"] > [data-xs-region="aux"] {
  background-color: var(--xs-bg-surface, #FCFBF7);
  background-image:
    var(--xs-tex-timber-svg),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), rgba(255, 253, 248, 0.65) 0%, transparent 72%);
  box-shadow: var(--xs-tactile-bevel-shadow);
}

/* Preset G: Honed Travertine Stone & Clay (트래버틴 석회암·현무암 — 다공성 자연석 부조) */
.xs-shell--app[data-xs-material="travertine"] {
  background-color: var(--xs-bg-subtle, #EBE4DA);
  background-image:
    var(--xs-tex-travertine-svg),
    radial-gradient(circle at var(--xs-light-x) var(--xs-light-y), var(--xs-light-glow) 0%, transparent 62%);
}
.xs-shell--app[data-xs-material="travertine"] > [data-xs-region="main"],
.xs-shell--app[data-xs-material="travertine"] > [data-xs-region="aux"] {
  background-color: var(--xs-bg-surface, #FFFDF9);
  background-image: var(--xs-tex-travertine-svg);
  box-shadow: var(--xs-tactile-bevel-shadow);
}

/* ==========================================================================
   INCIDENT LIGHT ATMOSPHERE PRESETS ([data-xs-light="morning|daylight|golden|moonlight"])
   Controls light color temperature (Kelvin), grazing angle, and cast shadow vector
   ========================================================================== */
[data-xs-light="morning"] {
  --xs-light-x: 16%;
  --xs-light-y: 14%;
  --xs-cast-x: 5px;
  --xs-cast-y: 10px;
  --xs-light-glow: rgba(255, 249, 235, 0.82);
  --xs-shadow-penumbra: rgba(28, 25, 23, 0.09);
}

[data-xs-light="daylight"] {
  --xs-light-x: 50%;
  --xs-light-y: 6%;
  --xs-cast-x: 0px;
  --xs-cast-y: 12px;
  --xs-light-glow: rgba(255, 255, 255, 0.85);
  --xs-shadow-penumbra: rgba(15, 23, 42, 0.08);
}

[data-xs-light="golden"] {
  --xs-light-x: 82%;
  --xs-light-y: 18%;
  --xs-cast-x: -7px;
  --xs-cast-y: 12px;
  --xs-light-glow: rgba(254, 240, 210, 0.78);
  --xs-shadow-penumbra: rgba(67, 20, 7, 0.11);
}

[data-xs-light="moonlight"] {
  --xs-light-x: 28%;
  --xs-light-y: 10%;
  --xs-cast-x: 4px;
  --xs-cast-y: 12px;
  --xs-light-glow: rgba(224, 242, 254, 0.25);
  --xs-shadow-penumbra: rgba(2, 6, 23, 0.28);
}

/* 4. Tactile Objecthood on Inner Stage, Header, Buttons, Keycaps & Composer */
.xs-shell--app > [data-xs-region="main"],
.xs-shell--app > [data-xs-region="aux"] {
  box-shadow: var(--xs-tactile-bevel-shadow);
}

.xs-shell--app > [data-xs-region="main"] > header {
  background: var(--xs-glass-chrome-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--xs-specular-rim-top), 0 1px 2px rgba(15, 23, 42, 0.03);
}

/* Tactile Hardware Push Buttons */
.xs-app-chrome-btn {
  background: var(--xs-tactile-button-surface);
  border: none;
  box-shadow: var(--xs-tactile-button-shadow);
  transition: transform 90ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 120ms ease, background 120ms ease, color 120ms ease;
}

.xs-app-chrome-btn:hover {
  box-shadow:
    0 2px 4px rgba(15, 23, 42, 0.1),
    0 0 0 1px var(--xs-border-strong, #94A3B8),
    inset 0 1px 0 0 rgba(255, 255, 255, 1);
}

.xs-app-chrome-btn:active {
  transform: translateY(1px) scale(0.985);
  box-shadow: var(--xs-tactile-recessed-well);
}

.xs-app-chrome-btn[aria-expanded="true"],
.xs-app-chrome-btn.is-active {
  background: linear-gradient(180deg, var(--xs-accent-navy, #1E3A8A) 0%, #172E6E 100%);
  color: #FFFFFF;
  box-shadow:
    0 1px 3px rgba(30, 58, 138, 0.35),
    0 0 0 1px rgba(30, 58, 138, 0.6),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.28);
}

.xs-app-chrome-btn.is-active .xs-app-kbd,
.xs-app-chrome-btn[aria-expanded="true"] .xs-app-kbd {
  background: rgba(255, 255, 255, 0.16);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: none;
}

/* Machined Mechanical Keycaps (.xs-app-kbd) */
.xs-app-kbd {
  border-radius: 4px;
  padding: 1px 5px;
  box-shadow: var(--xs-tactile-keycap-shadow);
  transform: translateY(-0.5px);
}

/* Recessed Milled Segmented Control Well (.xs-tactile-well) */
.xs-tactile-well {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--xs-bg-subtle, #E2E8F0) 85%, rgba(15, 23, 42, 0.06));
  box-shadow: var(--xs-tactile-recessed-well);
}

/* Floating Glass & Specular Command Capsule (.xs-app-composer-capsule) */
.xs-app-composer-capsule {
  background: var(--xs-glass-thick-bg);
  backdrop-filter: blur(24px) saturate(185%);
  -webkit-backdrop-filter: blur(24px) saturate(185%);
  border: 1px solid color-mix(in srgb, var(--xs-border-strong, #CBD5E1) 80%, rgba(255, 255, 255, 0.5));
  box-shadow:
    0 8px 24px -6px rgba(15, 23, 42, 0.1),
    0 2px 6px -1px rgba(15, 23, 42, 0.05),
    var(--xs-specular-rim-top);
}

/* Milled Physical Grip Pill on Splitters */
.xs-app-splitter::after {
  width: 4px;
  height: 36px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--xs-border-strong, #94A3B8) 55%, transparent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), 0 0 0 0.5px rgba(15, 23, 42, 0.08);
}

/* Physical Material Swatch Cards for Documentation Showcase */
.xs-material-swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.xs-material-card {
  position: relative;
  border-radius: 12px;
  padding: 16px;
  overflow: hidden;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  box-shadow: var(--xs-tactile-bevel-shadow);
  background-image: var(--xs-tactile-grain-svg);
  transition: transform 160ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 160ms ease;
  cursor: pointer;
  text-align: left;
}

.xs-material-card:hover {
  transform: translateY(-2px);
}

.xs-material-card.is-selected {
  outline: 2px solid var(--xs-accent-navy, #1E3A8A);
  outline-offset: 2px;
}

/* ==========================================================================
   Phase 1 & 2 Scientific Perceptual Auto-Compensation Rules (/find-research-clues)
   1. High-Relief Texture Stroke Grade Compensation (Legge et al., 1990):
      Counteracts 2.8~3.2 cpd spatial-frequency masking on Hanji & Travertine
      without layout shift (CLS = 0).
   2. Dark-Mode Astigmatic Halation Clamp:
      Caps specular rim intensity at 0.16 on Obsidian & TechDark surfaces.
   3. 256px Tile-Cached Procedural Texture Surface:
      Bounds SVG <feTurbulence> GPU rasterization to O(Tile) instead of O(Viewport).
   ========================================================================== */
.xs-shell[data-xs-texture="hanji"] .xs-message-prose,
.xs-shell[data-xs-texture="travertine"] .xs-message-prose,
[data-xs-texture="hanji"] .xs-shell .xs-message-prose,
[data-xs-texture="travertine"] .xs-shell .xs-message-prose {
  --xs-texture-grade-wght: 435;
  font-variation-settings: "wght" var(--xs-texture-grade-wght, 435);
  -webkit-font-smoothing: antialiased;
}

[data-xs-harmony="techdark"] .xs-shell,
[data-xs-harmony="obsidian"] .xs-shell,
.xs-shell[data-xs-harmony="techdark"],
.xs-shell[data-xs-harmony="obsidian"] {
  --xs-light-intensity: 0.16;
  --xs-specular-rim-top: inset 0 1px 0 0 rgba(255, 255, 255, 0.14);
}

.xs-shell[data-xs-texture]::before,
.xs-material-card {
  background-size: 256px 256px;
  background-repeat: repeat;
}

/* ==========================================================================
   5-Module Orthogonal Staging Management System (연출 모듈 통합 관리 시스템)
   Bindings for:
   - Module 1: [data-xs-craft] & [data-xs-curvature]
   - Module 2: [data-xs-harmony] (Tokens & Harmonies)
   - Module 3: [data-xs-topology] & [data-xs-density]
   - Module 4: [data-xs-light] & Optical Vectors
   - Module 5: [data-xs-voice] & [data-xs-spring]
   ========================================================================== */

/* Module 1A: Surface Craft Archetypes */
[data-xs-craft="liquid-glass"] {
  --xs-craft-blur: 24px;
  --xs-craft-saturate: 185%;
}
[data-xs-craft="tactile-craft"] {
  --xs-craft-blur: 12px;
  --xs-craft-saturate: 140%;
}
[data-xs-craft="editorial-press"] {
  --xs-craft-blur: 0px;
  --xs-craft-saturate: 100%;
  --xs-specular-rim-top: inset 0 1px 0 0 transparent;
}
[data-xs-craft="zero-chrome"] {
  --xs-craft-blur: 6px;
  --xs-craft-saturate: 105%;
  --xs-border-subtle: transparent;
}

/* Module 1B: Concentric Curvature Profiles (|R_outer - d_pad - R_inner| <= 1px) */
[data-xs-curvature="concentric-app"] {
  --xs-concentric-outer: 16px;
  --xs-concentric-pad: 6px;
  --xs-concentric-inner: 10px;
}
[data-xs-curvature="editorial-soft"] {
  --xs-concentric-outer: 8px;
  --xs-concentric-pad: 4px;
  --xs-concentric-inner: 4px;
}
[data-xs-curvature="swiss-sharp"] {
  --xs-concentric-outer: 0px;
  --xs-concentric-pad: 4px;
  --xs-concentric-inner: 0px;
}

/* Module 3: Workspace Topology Presets */
[data-xs-topology="focus-zen"] {
  --xs-reading-measure: 48rem;
}
[data-xs-topology="deliberation-5050"] {
  --xs-reading-measure: 44rem;
}
[data-xs-density="compact"] {
  --xs-density-scale: 0.85;
}
[data-xs-density="comfortable"] {
  --xs-density-scale: 1;
}
[data-xs-density="spacious"] {
  --xs-density-scale: 1.2;
}

/* Module 5A: Typography Voice */
[data-xs-voice="neo-grotesque"] .xs-message-prose,
.xs-shell[data-xs-voice="neo-grotesque"] {
  font-family: var(--xs-font-sans, "Pretendard Variable", "Inter", system-ui, sans-serif);
}
[data-xs-voice="editorial-serif"] .xs-message-prose,
.xs-shell[data-xs-voice="editorial-serif"] .xs-message-prose {
  font-family: Georgia, "Noto Serif KR", "AppleMyungjo", serif;
}
[data-xs-voice="technical-mono"] .xs-message-prose,
.xs-shell[data-xs-voice="technical-mono"] .xs-message-prose {
  font-family: var(--xs-font-mono, "JetBrains Mono", monospace);
  font-size: 0.92em;
}

/* Module 5B: Spring Motion Profiles */
[data-xs-spring="critically-damped"] {
  --xs-ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --xs-duration-spring: 240ms;
}
[data-xs-spring="snappy"] {
  --xs-ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --xs-duration-spring: 160ms;
}
[data-xs-spring="reduced-motion"] {
  --xs-ease-spring: linear;
  --xs-duration-spring: 0.01ms;
}

/* Staging Director Console UI (.xs-director-deck) */
.xs-director-deck {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  padding: 18px;
  border-radius: var(--xs-concentric-outer, 16px);
  background: var(--xs-surface-primary, #FFFFFF);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  box-shadow: var(--xs-tactile-bevel-shadow);
}

.xs-director-module-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  border-radius: var(--xs-concentric-inner, 10px);
  background: var(--xs-bg-canvas, #F8FAFC);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
}

.xs-director-module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--xs-text-secondary, #475569);
}

.xs-director-telemetry-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--xs-concentric-inner, 10px);
  background: var(--xs-bg-subtle, #F1F5F9);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  font-family: var(--xs-font-mono, monospace);
  font-size: 0.78rem;
}

/* ==========================================================================
   Multi-Layer Optical & Material Compositing Stack Engine (다중 레이어 적층 합성)
   Z0 (Base Substrate) -> Z1 (Primary Grain) -> Z2 (Secondary Cross-Weave) ->
   Z3 (Translucent Glaze/Blur) -> Z4 (Incident Caustic Light) ->
   Z5 (Specular Rim Bevel) -> Z10 (Protected Deterministic Text Foreground)
   ========================================================================== */
.xs-layer-stack-stage {
  --xs-layer-1-opacity: 0.16;
  --xs-layer-1-blend: multiply;
  --xs-layer-1-scale: 256px;
  --xs-layer-2-opacity: 0.08;
  --xs-layer-2-blend: soft-light;
  --xs-layer-2-scale: 128px;
  --xs-layer-3-opacity: 0.74;
  --xs-layer-3-blend: normal;
  --xs-layer-4-opacity: 0.22;
  --xs-layer-4-blend: overlay;
  --xs-layer-5-opacity: 0.85;
  --xs-layer-5-blend: screen;
  --xs-stack-blur: 18px;
  --xs-stack-font-wght: 435;

  position: relative;
  border-radius: var(--xs-concentric-outer, 16px);
  background: var(--xs-bg-canvas, #F4F8F6);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
  overflow: hidden;
  min-height: 290px;
  padding: 24px;
  transition: transform 360ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 360ms ease;
  transform-style: preserve-3d;
}

.xs-optical-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  transition: opacity 180ms ease, transform 420ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 420ms ease;
}

/* Z1: Primary Deep Grain Layer */
.xs-optical-layer[data-layer-slot="1"] {
  z-index: 1;
  opacity: var(--xs-layer-1-opacity, 0.16);
  mix-blend-mode: var(--xs-layer-1-blend, multiply);
  background-size: var(--xs-layer-1-scale, 256px) var(--xs-layer-1-scale, 256px);
  background-repeat: repeat;
}

/* Z2: Secondary Cross-Weave / Micro-Grain Layer */
.xs-optical-layer[data-layer-slot="2"] {
  z-index: 2;
  opacity: var(--xs-layer-2-opacity, 0.08);
  mix-blend-mode: var(--xs-layer-2-blend, soft-light);
  background-size: var(--xs-layer-2-scale, 128px) var(--xs-layer-2-scale, 128px);
  background-repeat: repeat;
}

/* Z3: Translucent Glaze / Liquid Glass Refraction Film */
.xs-optical-layer[data-layer-slot="3"] {
  z-index: 3;
  opacity: var(--xs-layer-3-opacity, 0.74);
  mix-blend-mode: var(--xs-layer-3-blend, normal);
  background: color-mix(in srgb, var(--xs-surface-primary, #FFFFFF) 78%, transparent);
  backdrop-filter: blur(var(--xs-stack-blur, 18px)) saturate(175%);
  -webkit-backdrop-filter: blur(var(--xs-stack-blur, 18px)) saturate(175%);
}

/* Z4: Incident Caustic Light & Atmospheric Gradient */
.xs-optical-layer[data-layer-slot="4"] {
  z-index: 4;
  opacity: var(--xs-layer-4-opacity, 0.22);
  mix-blend-mode: var(--xs-layer-4-blend, overlay);
  background: radial-gradient(
    circle at var(--xs-light-x, 28%) var(--xs-light-y, 16%),
    rgba(255, 252, 240, 0.92) 0%,
    rgba(255, 255, 255, 0.25) 42%,
    transparent 78%
  );
}

/* Z5: 1px Concentric Specular Rim & Inner Bevel */
.xs-optical-layer[data-layer-slot="5"] {
  z-index: 5;
  opacity: var(--xs-layer-5-opacity, 0.85);
  mix-blend-mode: var(--xs-layer-5-blend, screen);
  box-shadow:
    inset 0 1.5px 0 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 0 rgba(15, 23, 42, 0.08),
    inset 1px 0 0 0 rgba(255, 255, 255, 0.35),
    inset -1px 0 0 0 rgba(255, 255, 255, 0.35);
}

/* Z10: Deterministic Native Typography Foreground (Never muddied by background layers) */
.xs-layer-foreground-content {
  position: relative;
  z-index: 10;
  font-variation-settings: "wght" var(--xs-stack-font-wght, 435);
}

/* Exploded Isometric 3D Inspection Mode ([data-xs-stack-exploded="true"]) */
.xs-layer-stack-stage[data-xs-stack-exploded="true"] {
  overflow: visible;
  margin: 44px auto;
  transform: perspective(1100px) rotateX(42deg) rotateZ(-18deg) scale(0.88);
  box-shadow: -18px 28px 38px rgba(15, 23, 42, 0.18);
}

.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer {
  border: 1.5px dashed rgba(37, 99, 235, 0.55);
  box-shadow: -8px 12px 20px rgba(15, 23, 42, 0.10);
}

.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer[data-layer-slot="1"] {
  transform: translate3d(0, -14px, 18px);
}
.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer[data-layer-slot="2"] {
  transform: translate3d(0, -28px, 36px);
}
.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer[data-layer-slot="3"] {
  transform: translate3d(0, -42px, 54px);
}
.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer[data-layer-slot="4"] {
  transform: translate3d(0, -56px, 72px);
}
.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-optical-layer[data-layer-slot="5"] {
  transform: translate3d(0, -70px, 90px);
}
.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-layer-foreground-content {
  transform: translate3d(0, -86px, 110px);
  background: color-mix(in srgb, var(--xs-surface-primary, #FFFFFF) 88%, transparent);
  padding: 16px;
  border-radius: 10px;
  border: 1.5px solid var(--xs-color-accent, #0051FF);
  box-shadow: -10px 16px 26px rgba(15, 23, 42, 0.14);
}

.xs-layer-badge-tag {
  display: none;
  position: absolute;
  top: 8px;
  right: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.82);
  color: #F8FAFC;
  font-family: var(--xs-font-mono, monospace);
  font-size: 10px;
  font-weight: 700;
}

.xs-layer-stack-stage[data-xs-stack-exploded="true"] .xs-layer-badge-tag {
  display: inline-block;
}

/* --- File: publication-widgets.css --- */
/**
 * xsDesignSystem — Modular Widget & Publication Component System (v2.0.0)
 * Zero-AI Invariants: No ungrounded bento grids, no neon glows, pure typography & spatial grid.
 * APCA Lc >= 75 Compliance & WCAG 2.2 AAA Double-Ring Focus.
 */

/* ==========================================================================
   1. BASE MODULAR WIDGET CONTAINER & SLOTS
   ========================================================================== */

.xs-widget-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  width: 100%;
  margin: 24px 0;
}

.xs-widget-container--duo {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

.xs-widget {
  display: flex;
  flex-direction: column;
  background-color: var(--xs-widget-bg, var(--xs-bg-surface, #FFFFFF));
  border: 1px solid var(--xs-widget-border, var(--xs-border-subtle, #E2E8F0));
  border-radius: var(--xs-widget-radius, var(--xs-radius-sm, 6px));
  box-shadow: var(--xs-widget-shadow, var(--xs-shadow-subtle, 0 1px 3px rgba(0,0,0,0.04)));
  overflow: hidden;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  position: relative;
  font-family: inherit;
}

.xs-widget:focus-within {
  border-color: var(--xs-border-strong);
}

.xs-widget:focus-visible {
  outline: var(--xs-focus-ring-width, 2px) solid var(--xs-focus-ring-outer, #1E3A8A);
  outline-offset: var(--xs-focus-ring-offset, 2px);
}

/* Header & Meta */
.xs-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--xs-widget-header-bg, var(--xs-bg-subtle, #F8FAFC));
  border-bottom: 1px solid var(--xs-widget-border, var(--xs-border-subtle, #E2E8F0));
  gap: 12px;
}

.xs-widget__header-lead {
  display: flex;
  align-items: center;
  gap: 8px;
}

.xs-widget__category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--xs-text-muted, #64748B);
}

.xs-widget__title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--xs-text-ink, #0F172A);
  line-height: 1.4;
}

.xs-widget__badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 2px;
  background-color: var(--xs-bg-subtle, #F1F5F9);
  color: var(--xs-text-body, #334155);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
}

.xs-widget__badge--seal {
  background-color: var(--xs-accent-vermilion-light, #FEF2F2);
  color: var(--xs-accent-vermilion, #C9381F);
  border-color: var(--xs-accent-vermilion-border, #FECACA);
}

.xs-widget__badge--indigo {
  background-color: var(--xs-accent-navy-light, #EEF2FF);
  color: var(--xs-accent-navy, #182B49);
  border-color: var(--xs-accent-navy-border, #C7D2FE);
}

/* Body & Slots */
.xs-widget__body {
  padding: 16px;
  flex: 1 1 auto;
  color: var(--xs-text-body, #334155);
  font-size: 13px;
  line-height: 1.6;
}

.xs-widget__slot {
  margin-top: 12px;
}

/* Footer & Actions */
.xs-widget__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: var(--xs-bg-subtle, #FAFBFD);
  border-top: 1px solid var(--xs-border-subtle, #F0F0F0);
  font-size: 12px;
  color: var(--xs-text-muted, #64748B);
  gap: 8px;
}

.xs-widget__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.xs-widget__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--xs-radius-xs, 4px);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
  background-color: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-text-ink, #0F172A);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.12s ease;
}

.xs-widget__btn:hover {
  background-color: var(--xs-bg-subtle, #F1F5F9);
  border-color: var(--xs-border-strong, #94A3B8);
  color: var(--xs-text-ink, #0F172A);
}

.xs-widget__btn:focus-visible {
  outline: 2px solid var(--xs-focus-ring-outer, #1E3A8A);
  outline-offset: 1px;
}

.xs-widget__btn--primary {
  background-color: var(--xs-accent-navy, #1E3A8A);
  color: #FFFFFF;
  border-color: var(--xs-accent-navy, #1E3A8A);
}

.xs-widget__btn--primary:hover {
  background-color: var(--xs-accent-navy-hover, #1E293B);
  color: #FFFFFF;
}

/* ==========================================================================
   2. SPECIALIZED PUBLICATION WIDGET: BOOK COLOPHON (판권지 위젯)
   ========================================================================== */

.xs-widget--colophon {
  background-color: var(--xs-bg-surface, #F7F4EE);
  border: 1px solid var(--xs-border-subtle, #DCD7CD);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Serif KR", serif;
}

.xs-widget--colophon .xs-widget__header {
  background-color: transparent;
  border-bottom: 2px solid var(--xs-border-strong, #090B0E);
  padding: 16px 20px 12px;
}

.xs-widget--colophon .xs-widget__body {
  padding: 20px;
}

.xs-colophon-grid {
  display: grid;
  grid-template-columns: 80px 1fr;
  row-gap: 8px;
  column-gap: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--xs-text-body, #121314);
}

.xs-colophon-grid dt {
  font-weight: 600;
  color: var(--xs-text-muted, #1C1917);
  letter-spacing: -0.01em;
}

.xs-colophon-grid dd {
  margin: 0;
  color: var(--xs-text-ink, #121314);
}

.xs-colophon-seal {
  width: var(--xs-widget-colophon-seal-size, 48px);
  height: var(--xs-widget-colophon-seal-size, 48px);
  border: 2px solid var(--xs-accent-vermilion, #C9381F);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: serif;
  font-weight: 900;
  font-size: 13px;
  color: var(--xs-accent-vermilion, #C9381F);
  letter-spacing: 1px;
  line-height: 1.1;
  text-align: center;
  padding: 2px;
  box-shadow: inset 0 0 4px rgba(201, 56, 31, 0.15);
  background: var(--xs-accent-vermilion-light, rgba(201, 56, 31, 0.03));
}

.xs-colophon-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--xs-border-subtle, #DCD7CD);
}

.xs-colophon-isbn {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--xs-text-muted, #1C1917);
}

/* ==========================================================================
   3. SPECIALIZED PUBLICATION WIDGET: PALETTE & SUBSTRATE MATRIX (지업·잉크 스와치 위젯)
   ========================================================================== */

.xs-widget--palette .xs-palette-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.xs-swatch-item {
  display: flex;
  flex-direction: column;
  padding: 8px;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  border-radius: 4px;
  background: var(--xs-bg-surface, #FFFFFF);
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.12s ease;
  position: relative;
}

.xs-swatch-item:hover {
  border-color: var(--xs-border-strong);
  transform: translateY(-1px);
}

.xs-swatch-item:focus-visible {
  outline: 2px solid var(--xs-focus-ring-outer, #1E3A8A);
  outline-offset: 1px;
}

.xs-swatch-preview {
  height: 44px;
  border-radius: 2px;
  border: 1px solid var(--xs-border-subtle);
  margin-bottom: 8px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.xs-swatch-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--xs-text-ink, #0F172A);
  margin-bottom: 2px;
}

.xs-swatch-spec {
  font-size: 11px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  color: var(--xs-text-muted, #64748B);
}

/* ==========================================================================
   4. SPECIALIZED PUBLICATION WIDGET: EDITORIAL GRID & IMPOSITION (조판·판형 위젯)
   ========================================================================== */

.xs-widget--editorial-grid .xs-grid-stage {
  background-color: var(--xs-bg-subtle, #F1F5F9);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
  border-radius: 4px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.xs-page-geometry {
  width: 160px;
  height: 220px;
  background-color: var(--xs-pub-substrate-munken-pure, #F7F4EE);
  border: 1px solid #94A3B8;
  position: relative;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
  padding: 14px 12px 16px 16px; /* Inner margin emulated */
  display: flex;
  flex-direction: column;
}

.xs-page-bleed-guide {
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 1px dashed #DC2626;
  pointer-events: none;
}

.xs-page-text-area {
  flex: 1;
  border: 1px solid rgba(24, 43, 73, 0.25);
  background-color: rgba(255, 255, 255, 0.6);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.xs-page-text-line {
  height: 3px;
  background-color: var(--xs-pub-ink-rich-black, #090B0E);
  opacity: 0.25;
  border-radius: 1px;
}

.xs-page-text-line--title {
  height: 6px;
  width: 70%;
  opacity: 0.8;
  background-color: var(--xs-pub-ink-rich-black, #090B0E);
}

.xs-geometry-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-top: 12px;
  font-size: 12px;
}

.xs-geometry-meta-item {
  padding: 6px 10px;
  background: var(--xs-bg-subtle, #F1F5F9);
  border-radius: 3px;
  display: flex;
  justify-content: space-between;
}

/* ==========================================================================
   5. SPECIALIZED WIDGET: 50:50 DELIBERATION (모듈형 심의 위젯)
   ========================================================================== */

.xs-widget--deliberation .xs-deliberation-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 12px;
}

@media (max-width: 640px) {
  .xs-widget--deliberation .xs-deliberation-split {
    grid-template-columns: 1fr;
  }
}

.xs-deliberation-pane {
  padding: 12px;
  border-radius: 4px;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  background: #FFFFFF;
}

.xs-deliberation-pane--thesis {
  border-left: 3px solid var(--xs-primitive-sage-700, #15803D);
  background: #F0FDF4;
}

.xs-deliberation-pane--antithesis {
  border-left: 3px solid var(--xs-primitive-red-600, #DC2626);
  background: #FEF2F2;
}

.xs-deliberation-pane-title {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.xs-deliberation-pane--thesis .xs-deliberation-pane-title {
  color: var(--xs-primitive-sage-800, #166534);
}

.xs-deliberation-pane--antithesis .xs-deliberation-pane-title {
  color: var(--xs-primitive-red-700, #B91C1C);
}

/* ==========================================================================
   6. SPECIALIZED WIDGET: 3-STRATUM KNOWLEDGE (3층 지식 위젯)
   ========================================================================== */

.xs-widget--stratum .xs-stratum-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.xs-stratum-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  border-radius: 4px;
  background-color: #FFFFFF;
  font-size: 13px;
}

.xs-stratum-row--s1 { border-left: 3px solid var(--xs-primitive-navy-900); }
.xs-stratum-row--s2 { border-left: 3px solid var(--xs-primitive-sage-700); }
.xs-stratum-row--s3 { border-left: 3px solid var(--xs-primitive-amber-600); }

.xs-stratum-row__label {
  font-weight: 600;
  color: var(--xs-text-ink, #0F172A);
  display: flex;
  align-items: center;
  gap: 8px;
}

.xs-stratum-row__type {
  font-size: 11px;
  font-family: monospace;
  padding: 1px 6px;
  border-radius: 2px;
  background: var(--xs-bg-subtle, #F1F5F9);
  color: var(--xs-text-muted, #64748B);
}

/* --- File: image-staging-engine.css --- */
/**
 * xsDesignSystems — 3-Layer Hybrid Visual Staging Styles
 * Zero-AI Invariant: Zero Contextless Neon Glow, Spot Color <= 3%, 1:1 Light/Dark Parity.
 */

.xs-hybrid-stage {
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  font-family: var(--xs-font-sans, -apple-system, BlinkMacSystemFont, "Pretendard", sans-serif);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.xs-hybrid-layer {
  box-sizing: border-box;
}

.xs-layer-scene {
  pointer-events: none;
  user-select: none;
}

.xs-layer-vectors {
  pointer-events: none;
  user-select: none;
}

.xs-layer-typography {
  position: relative;
  pointer-events: auto;
}

/* 5 Kinetic Archetype Geometry Hooks */
.xs-hybrid-stage[data-archetype="kinetic-pivot"] .xs-layer-vectors svg {
  transform-origin: center center;
}

.xs-hybrid-stage[data-archetype="gravitational-stream"] .xs-layer-vectors svg path {
  stroke-dasharray: 6 3;
}

.xs-hybrid-stage[data-archetype="scale-caliper"] .xs-layer-vectors line {
  stroke-width: 1px;
}

.xs-hybrid-stage[data-archetype="precision-docking"] .xs-layer-vectors rect {
  rx: 2px;
}

.xs-hybrid-stage[data-archetype="hydraulic-engine"] .xs-layer-vectors path {
  stroke-linejoin: round;
}

/* Zero-AI Compliance: No uncontextual glowing box shadows */
.xs-hybrid-stage:focus-visible {
  outline: 2px solid var(--xs-brand-primary, #2563EB);
  outline-offset: 2px;
}

/* Fluid responsive typography within hybrid stage */
.xs-hybrid-stage h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.875rem);
  letter-spacing: -0.02em;
}

.xs-hybrid-stage p {
  font-size: clamp(0.875rem, 1.2vw, 1rem);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .xs-hybrid-stage {
    padding: 16px;
    min-height: 380px;
  }
  .xs-hybrid-metrics {
    grid-template-columns: 1fr;
  }
}

/* --- File: carbon-structural.css --- */
/**
 * Carbon Design System — Structural & Unstyled Component Baseline (v1.0.0)
 * Pure Neutral / Wireframe / Headless UI Modules
 * No Colors, No Theming, No Decorative Effects
 */

/* ==========================================================================
   0. Baseline Reset, Focus Management & Accessibility Utilities (WAI-ARIA)
   ========================================================================== */
.carbon-root, .carbon-root * {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: inherit;
}

/* Accessible Focus-Visible (Double-Ring APCA Lc 75+ & High-Contrast Compliant) */
:focus {
  outline: none;
}

/* Strict Input Modality Isolation: Completely suppress outline during mouse/pointer interaction */
:focus:not(:focus-visible),
.carbon-root :focus:not(:focus-visible) {
  outline: none !important;
  box-shadow: none !important;
}

:focus-visible,
.carbon-root button:focus-visible,
.carbon-root input:focus-visible,
.carbon-root select:focus-visible,
.carbon-root textarea:focus-visible,
.carbon-root a:focus-visible,
.carbon-root [tabindex]:focus-visible,
.carbon-root [role="button"]:focus-visible,
.carbon-root [role="tab"]:focus-visible,
.carbon-root [role="treeitem"]:focus-visible,
.carbon-root [role="menuitem"]:focus-visible,
.carbon-root [role="option"]:focus-visible {
  outline: var(--xs-focus-ring-width, 2px) solid var(--xs-focus-ring-outer, #1E3A8A) !important;
  outline-offset: var(--xs-focus-ring-offset, 2px) !important;
  box-shadow: 0 0 0 var(--xs-focus-ring-offset, 2px) var(--xs-focus-ring-inner, #FFFFFF) !important;
  transition: outline-offset 0.1s ease, box-shadow 0.1s ease;
}

/* Windows High Contrast / Forced Colors Mode */
@media (forced-colors: active) {
  :focus-visible,
  .carbon-root button:focus-visible,
  .carbon-root input:focus-visible,
  .carbon-root select:focus-visible,
  .carbon-root textarea:focus-visible,
  .carbon-root a:focus-visible,
  .carbon-root [tabindex]:focus-visible,
  .carbon-root [role="button"]:focus-visible,
  .carbon-root [role="tab"]:focus-visible,
  .carbon-root [role="treeitem"]:focus-visible,
  .carbon-root [role="menuitem"]:focus-visible,
  .carbon-root [role="option"]:focus-visible {
    outline: 3px solid Highlight !important;
    outline-offset: 3px !important;
    box-shadow: none !important;
  }
}

/* Screen Reader Only (Visually Hidden, Accessible to Assistive Tech) */
.carbon-sr-only,
.carbon-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Skip Navigation Link */
.carbon-skip-link {
  position: absolute;
  top: -9999px;
  left: 16px;
  background: #0F172A;
  color: #FFFFFF;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  z-index: 9999;
  border: 2px solid #FFFFFF;
}

.carbon-skip-link:focus,
.carbon-skip-link:focus-visible {
  top: 16px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   A. Navigation Components
   ========================================================================== */

/* 1. Header / UI Shell */
.carbon-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  border-bottom: 1px solid #71717A;
  background: #FFFFFF;
  padding: 0 16px;
  position: relative;
  z-index: 100;
}
.carbon-header-left, .carbon-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.carbon-header-title {
  font-weight: 700;
  font-size: 14px;
}
.carbon-header-nav {
  display: flex;
  list-style: none;
  gap: 8px;
}
.carbon-header-nav-item a {
  display: block;
  padding: 8px 12px;
  text-decoration: none;
  color: inherit;
  font-size: 13px;
  border: 1px solid transparent;
}
.carbon-header-nav-item a:hover {
  border-color: #A1A1AA;
}

/* 2. Side Navigation / Tree View */
.carbon-sidenav {
  width: 240px;
  border-right: 1px solid #71717A;
  background: #FAFAFA;
  display: flex;
  flex-direction: column;
}
.carbon-sidenav-list {
  list-style: none;
  padding: 8px 0;
}
.carbon-sidenav-item a, .carbon-sidenav-item button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 16px;
  font-size: 13px;
  text-align: left;
  background: none;
  border: none;
  border-left: 3px solid transparent;
  cursor: pointer;
  color: inherit;
}
.carbon-sidenav-item.is-active a, .carbon-sidenav-item.is-active button {
  font-weight: 700;
  border-left-color: #18181B;
  background: #F4F4F5;
}

/* Tree View */
.carbon-treeview {
  list-style: none;
  font-size: 13px;
}
.carbon-treeview-node {
  padding-left: 16px;
}
.carbon-treeview-label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  cursor: pointer;
  border: 1px solid transparent;
}
.carbon-treeview-label:hover {
  border-color: #D4D4D8;
}

/* 3. Breadcrumb */
.carbon-breadcrumb {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 6px;
  font-size: 12px;
}
.carbon-breadcrumb-item:not(:last-child)::after {
  content: "/";
  margin-left: 6px;
  color: #A1A1AA;
}
.carbon-breadcrumb-item a {
  color: inherit;
  text-decoration: underline;
}
.carbon-breadcrumb-item.is-current {
  font-weight: 700;
  text-decoration: none;
}

/* 4. Pagination */
.carbon-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-top: 1px solid #E4E4E7;
  font-size: 12px;
}
.carbon-pagination-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 5. Tabs */
.carbon-tabs {
  display: flex;
  flex-direction: column;
}
.carbon-tab-list {
  display: flex;
  list-style: none;
  border-bottom: 1px solid var(--xs-border-subtle, #D4D4D8);
  gap: 2px;
}
.carbon-tab-btn, .carbon-tab {
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 500;
  background: var(--xs-bg-surface, transparent);
  border: 1px solid var(--xs-border-subtle, transparent);
  border-bottom: 2px solid transparent;
  border-radius: var(--xs-radius-xs, 4px) var(--xs-radius-xs, 4px) 0 0;
  cursor: pointer;
  color: var(--xs-text-muted, inherit);
  transition: all 0.12s ease;
}
.carbon-tab-btn:hover, .carbon-tab:hover {
  background: var(--xs-bg-subtle, #F4F4F5);
  color: var(--xs-text-ink, inherit);
}
.carbon-tab-btn[aria-selected="true"], .carbon-tab-btn.is-active,
.carbon-tab[aria-selected="true"], .carbon-tab.active, .carbon-tab.is-active {
  font-weight: 700;
  color: var(--xs-accent-navy, #18181B);
  background: var(--xs-accent-navy-light, #EEF2FF);
  border-color: var(--xs-accent-navy-border, #C7D2FE);
  border-bottom-color: var(--xs-accent-navy, #18181B);
}
.carbon-tab-panel {
  padding: 16px 0;
  display: none;
}
.carbon-tab-panel.is-active {
  display: block;
}

/* 6. Content Switcher */
.carbon-content-switcher {
  display: inline-flex;
  border: 1px solid #71717A;
}
.carbon-content-switcher-btn {
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  background: #FFFFFF;
  border: none;
  border-right: 1px solid #71717A;
  cursor: pointer;
  color: inherit;
}
.carbon-content-switcher-btn:last-child {
  border-right: none;
}
.carbon-content-switcher-btn[aria-selected="true"], .carbon-content-switcher-btn.is-active {
  background: #18181B;
  color: #FFFFFF;
  font-weight: 700;
}

/* ==========================================================================
   B. Inputs & Form Controls
   ========================================================================== */

.carbon-form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}
.carbon-label {
  font-size: 12px;
  font-weight: 600;
  color: inherit;
}
.carbon-helper-text {
  font-size: 11px;
  color: #71717A;
}
.carbon-error-text {
  font-size: 11px;
  font-weight: 600;
  color: #000000;
  display: none;
}
.has-error .carbon-error-text {
  display: block;
}

/* Text Input & Text Area */
.carbon-text-input, .carbon-textarea, .carbon-select-input {
  width: 100%;
  padding: 8px 12px;
  font-size: 13px;
  border: 1px solid #71717A;
  background: #FFFFFF;
  color: inherit;
  outline: none;
}
.carbon-text-input:focus, .carbon-textarea:focus, .carbon-select-input:focus {
  border-width: 2px;
  outline: 1px solid #000000;
}
.carbon-textarea {
  min-height: 80px;
  resize: vertical;
}

/* Number Input */
.carbon-number-input-wrap {
  display: inline-flex;
  border: 1px solid #71717A;
}
.carbon-number-input {
  border: none;
  padding: 8px 12px;
  width: 100px;
  outline: none;
  font-size: 13px;
}
.carbon-number-steppers {
  display: flex;
  flex-direction: column;
  border-left: 1px solid #71717A;
}
.carbon-stepper-btn {
  background: #FAFAFA;
  border: none;
  border-bottom: 1px solid #E4E4E7;
  padding: 2px 8px;
  cursor: pointer;
  font-size: 10px;
}
.carbon-stepper-btn:last-child {
  border-bottom: none;
}

/* Checkbox & Radio */
.carbon-checkbox-label, .carbon-radio-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}
.carbon-checkbox-input, .carbon-radio-input {
  width: 16px;
  height: 16px;
  border: 1px solid #71717A;
  cursor: pointer;
}

/* Toggle / Switch */
.carbon-toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  cursor: pointer;
}
.carbon-toggle-track {
  width: 36px;
  height: 20px;
  background: #E4E4E7;
  border: 1px solid #71717A;
  border-radius: 10px;
  position: relative;
  transition: all 150ms ease;
}
.carbon-toggle-thumb {
  width: 14px;
  height: 14px;
  background: #18181B;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: all 150ms ease;
}
.carbon-toggle-input:checked + .carbon-toggle-track {
  background: #18181B;
}
.carbon-toggle-input:checked + .carbon-toggle-track .carbon-toggle-thumb {
  background: #FFFFFF;
  transform: translateX(16px);
}
.carbon-toggle-input {
  display: none;
}

/* Slider */
.carbon-slider-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}
.carbon-slider-input {
  flex: 1;
  cursor: pointer;
}
.carbon-slider-val {
  font-size: 12px;
  font-family: monospace;
  width: 36px;
}

/* File Uploader */
.carbon-file-uploader-dropzone {
  border: 2px dashed #71717A;
  padding: 24px;
  text-align: center;
  background: #FAFAFA;
  cursor: pointer;
}
.carbon-file-list {
  list-style: none;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.carbon-file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: #FFFFFF;
  border: 1px solid #E4E4E7;
  font-size: 12px;
}

/* Search */
.carbon-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.carbon-search-input {
  width: 100%;
  padding: 8px 32px 8px 12px;
  border: 1px solid #71717A;
  font-size: 13px;
  outline: none;
}

/* ==========================================================================
   C. Buttons & Action Components
   ========================================================================== */
.carbon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--xs-border-subtle, #18181B);
  border-radius: var(--xs-radius-xs, 4px);
  background: var(--xs-bg-surface, #18181B);
  color: var(--xs-text-ink, #FFFFFF);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.12s ease;
}
.carbon-btn:hover {
  background: var(--xs-bg-subtle, #27272E);
  border-color: var(--xs-border-strong, #71717A);
}
.carbon-btn-secondary, .carbon-btn--secondary {
  background: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-text-ink, #18181B);
  border: 1px solid var(--xs-border-strong, #18181B);
}
.carbon-btn-tertiary, .carbon-btn--tertiary {
  background: transparent;
  color: var(--xs-text-ink, #18181B);
  border: 1px solid var(--xs-border-subtle, #71717A);
}
.carbon-btn-ghost, .carbon-btn--ghost {
  background: transparent;
  color: var(--xs-text-body, #18181B);
  border: 1px solid transparent;
}
.carbon-btn-ghost:hover, .carbon-btn--ghost:hover {
  background: var(--xs-bg-surface, rgba(255,255,255,0.08));
  border-color: var(--xs-border-subtle, #D4D4D8);
  color: var(--xs-text-ink, #18181B);
}
.carbon-btn.active, .carbon-btn.is-active,
.carbon-btn-ghost.active, .carbon-btn--ghost.active {
  background: var(--xs-accent-navy, #1E3A8A);
  color: #FFFFFF;
  border-color: var(--xs-accent-navy, #1E3A8A);
}
.carbon-btn-danger, .carbon-btn--danger {
  background: var(--xs-accent-vermilion, #DC2626);
  color: #FFFFFF;
  border: 1px solid var(--xs-accent-vermilion, #DC2626);
}

.carbon-btn-set {
  display: flex;
  gap: 1px;
  border: 1px solid #18181B;
}
.carbon-btn-set .carbon-btn {
  border: none;
  flex: 1;
}

/* Overflow Menu */
.carbon-overflow-menu-wrap {
  position: relative;
  display: inline-block;
}
.carbon-overflow-menu-btn {
  background: none;
  border: 1px solid transparent;
  padding: 4px 8px;
  font-size: 16px;
  cursor: pointer;
}
.carbon-overflow-menu-btn:hover {
  border-color: #71717A;
}
.carbon-overflow-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: #FFFFFF;
  border: 1px solid #71717A;
  min-width: 140px;
  list-style: none;
  z-index: 200;
  display: none;
}
.carbon-overflow-menu-dropdown.is-open {
  display: block;
}
.carbon-overflow-menu-item a, .carbon-overflow-menu-item button {
  display: block;
  width: 100%;
  padding: 8px 12px;
  font-size: 12px;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  text-decoration: none;
}
.carbon-overflow-menu-item:hover {
  background: #F4F4F5;
}

/* Link */
.carbon-link {
  font-size: 13px;
  color: inherit;
  text-decoration: underline;
  cursor: pointer;
}

/* ==========================================================================
   D. Data Display & Content Structure
   ========================================================================== */

/* Data Table */
.carbon-table-container {
  width: 100%;
  border: 1px solid #71717A;
  overflow-x: auto;
}
.carbon-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}
.carbon-table th {
  background: #F4F4F5;
  padding: 10px 14px;
  font-weight: 700;
  border-bottom: 1px solid #71717A;
  border-right: 1px solid #E4E4E7;
}
.carbon-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #E4E4E7;
  border-right: 1px solid #E4E4E7;
}
.carbon-table tr:hover td {
  background: #FAFAFA;
}

/* Structured List */
.carbon-structured-list {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.carbon-structured-list th {
  padding: 8px 12px;
  font-weight: 700;
  border-bottom: 2px solid #18181B;
  text-align: left;
}
.carbon-structured-list td {
  padding: 8px 12px;
  border-bottom: 1px solid #E4E4E7;
}

/* Accordion */
.carbon-accordion {
  border-top: 1px solid #71717A;
  list-style: none;
}
.carbon-accordion-item {
  border-bottom: 1px solid #71717A;
}
.carbon-accordion-header {
  width: 100%;
  padding: 12px 16px;
  background: none;
  border: none;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
}
.carbon-accordion-content {
  padding: 0 16px 12px;
  font-size: 13px;
  display: none;
}
.carbon-accordion-item.is-open .carbon-accordion-content {
  display: block;
}

/* Tile */
.carbon-tile {
  border: 1px solid #71717A;
  background: #FFFFFF;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.carbon-tile.is-clickable {
  cursor: pointer;
}
.carbon-tile.is-clickable:hover {
  border-width: 2px;
}

/* Code Snippet */
.carbon-code-snippet {
  border: 1px solid #71717A;
  background: #F4F4F5;
  padding: 12px 16px;
  font-family: monospace;
  font-size: 12px;
  position: relative;
  overflow-x: auto;
}
.carbon-code-snippet-inline {
  border: 1px solid #A1A1AA;
  background: #F4F4F5;
  padding: 2px 6px;
  font-family: monospace;
  font-size: 11px;
}

/* Tag / Badge */
.carbon-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--xs-radius-xs, 4px);
  border: 1px solid var(--xs-border-subtle, #18181B);
  background: var(--xs-bg-subtle, #FFFFFF);
  color: var(--xs-text-ink, #18181B);
}

/* ==========================================================================
   E. Feedback & Status Components
   ========================================================================== */

/* Notification (Inline / Toast) */
.carbon-notification {
  border: 1px solid #18181B;
  border-left: 6px solid #18181B;
  padding: 12px 16px;
  background: #FAFAFA;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
  margin-bottom: 12px;
}
.carbon-notification-title {
  font-weight: 700;
  margin-bottom: 2px;
}
.carbon-notification-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
}

/* Progress Bar */
.carbon-progress-bar-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.carbon-progress-bar-track {
  width: 100%;
  height: 8px;
  border: 1px solid #71717A;
  background: #E4E4E7;
}
.carbon-progress-bar-fill {
  height: 100%;
  background: #18181B;
  width: 0%;
}

/* Progress Indicator (Step Wizard) */
.carbon-progress-indicator {
  display: flex;
  list-style: none;
  border-bottom: 1px solid #71717A;
}
.carbon-progress-step {
  flex: 1;
  padding: 10px 12px;
  border-right: 1px solid #E4E4E7;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.carbon-progress-step.is-current {
  font-weight: 700;
  border-bottom: 3px solid #18181B;
}

/* Skeleton Loaders */
.carbon-skeleton-text {
  height: 14px;
  background: #E4E4E7;
  margin-bottom: 6px;
}
.carbon-skeleton-btn {
  height: 36px;
  width: 100px;
  background: #E4E4E7;
}

/* ==========================================================================
   F. Overlays & Dialogs
   ========================================================================== */

/* Modal */
.carbon-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  display: none;
}
.carbon-modal-backdrop.is-open {
  display: flex;
}
.carbon-modal {
  background: #FFFFFF;
  border: 1px solid #18181B;
  width: 100%;
  max-width: 520px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.carbon-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid #E4E4E7;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.carbon-modal-title {
  font-size: 16px;
  font-weight: 700;
}
.carbon-modal-body {
  padding: 20px;
  font-size: 13px;
  line-height: 1.5;
}
.carbon-modal-footer {
  padding: 12px 20px;
  border-top: 1px solid #E4E4E7;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Tooltip */
.carbon-tooltip-wrap {
  position: relative;
  display: inline-block;
}
.carbon-tooltip-bubble {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 6px;
  padding: 4px 8px;
  background: #18181B;
  color: #FFFFFF;
  font-size: 11px;
  border: 1px solid #000000;
  white-space: nowrap;
  display: none;
  z-index: 500;
}
.carbon-tooltip-wrap:hover .carbon-tooltip-bubble {
  display: block;
}

/* --- File: staging-decorator.css --- */
/**
 * xsDesignSystem — Kinetic Staging Decorator (v2.0.0)
 * Modular Coupling: Carbon Achromatic Components + 5 Geometric Staging Archetypes
 * (Rotation / Gravity / Caliper / Docking / Kinetic Engine)
 * Zero-AI Invariants: Spot Color <= 3%, APCA Lc >= 75, High-Precision Mechanical Geometry
 */

/* ==========================================================================
   1. Staging Base Stage & Canvas
   ========================================================================== */
.xs-stage-container {
  position: relative;
  background: var(--xs-bg-surface, #FFFFFF);
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  padding: 24px;
  margin-bottom: 24px;
  overflow: hidden;
  transition: border-color var(--xs-transition-fast, 120ms ease);
}

.xs-stage-container:focus-within {
  border-color: var(--xs-border-focus, #1E293B);
}

.xs-stage-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--xs-border-subtle, #E2E8F0);
}

.xs-stage-title {
  font-family: var(--xs-font-mono, monospace);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--xs-text-secondary, #475569);
  display: flex;
  align-items: center;
  gap: 8px;
}

.xs-stage-badge {
  font-family: var(--xs-font-mono, monospace);
  font-size: 11px;
  padding: 2px 6px;
  background: var(--xs-bg-subtle, #F1F5F9);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
  color: var(--xs-text-primary, #0F172A);
  font-weight: 600;
}

.xs-stage-badge[data-status="active"] {
  background: var(--xs-primitive-navy-900, #1E3A8A);
  color: #FFFFFF;
  border-color: var(--xs-primitive-navy-900, #1E3A8A);
}

/* ==========================================================================
   2. Archetype 1: Caliper Precision Stage (캘리퍼스 정밀 측정 무대)
   ========================================================================== */
[xs-stage="caliper"],
.xs-stage-caliper {
  position: relative;
  border: 1px solid var(--xs-border-strong, #94A3B8);
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 28px 20px 20px 20px;
}

[xs-stage="caliper"]::before,
.xs-stage-caliper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 12px;
  background: repeating-linear-gradient(
    90deg,
    var(--xs-border-strong, #94A3B8) 0,
    var(--xs-border-strong, #94A3B8) 1px,
    transparent 1px,
    transparent 8px
  ),
  repeating-linear-gradient(
    90deg,
    var(--xs-text-primary, #0F172A) 0,
    var(--xs-text-primary, #0F172A) 1px,
    transparent 1px,
    transparent 40px
  );
  border-bottom: 1px solid var(--xs-border-subtle, #CBD5E1);
  opacity: 0.85;
}

[xs-stage="caliper"]::after,
.xs-stage-caliper::after {
  content: "VERNIER 0.01mm · ISO 2768-m";
  position: absolute;
  top: 14px;
  right: 8px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 9px;
  letter-spacing: 0.05em;
  color: var(--xs-text-muted, #64748B);
}

/* Caliper Jaw Reticle Indicator on focus / hover */
[xs-stage="caliper"]:hover,
[xs-stage="caliper"]:focus-within {
  box-shadow: inset 0 0 0 1px var(--xs-primitive-navy-900, #1E3A8A);
}

/* ==========================================================================
   3. Archetype 2: Kinetic Engine / Manifold Stage (동역학 엔진 & 매니폴드 무대)
   ========================================================================== */
[xs-stage="engine"],
.xs-stage-engine {
  position: relative;
  border: 1px solid var(--xs-border-strong, #475569);
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 24px;
}

.xs-stage-engine-manifold {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.xs-stage-pulse-line {
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--xs-border-strong, #94A3B8) 0,
    var(--xs-border-strong, #94A3B8) 6px,
    transparent 6px,
    transparent 12px
  );
  position: relative;
}

.xs-stage-pulse-line::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  top: -2px;
  left: 0;
  background: var(--xs-primitive-navy-900, #1E3A8A);
  border-radius: 50%;
  animation: xsPulseTravel 2.4s linear infinite;
}

@keyframes xsPulseTravel {
  0% { left: 0%; opacity: 0.2; }
  50% { opacity: 1; }
  100% { left: calc(100% - 6px); opacity: 0.2; }
}

/* ==========================================================================
   4. Archetype 3: Docking & Interlock Stage (도킹 & 기계적 결합 무대)
   ========================================================================== */
[xs-stage="dock"],
.xs-stage-dock {
  position: relative;
  border: 1px dashed var(--xs-border-strong, #64748B);
  background: var(--xs-bg-canvas, #F8FAFC);
  padding: 20px;
  transition: background-color var(--xs-transition-fast, 120ms ease), border-color var(--xs-transition-fast, 120ms ease);
}

[xs-stage="dock"]::before {
  content: "DOCK PIN ⌖";
  position: absolute;
  top: -10px;
  left: 16px;
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 0 6px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 10px;
  font-weight: 700;
  color: var(--xs-text-secondary, #334155);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
}

.xs-stage-dock[data-docked="true"],
[xs-stage="dock"].is-docked {
  border-style: solid;
  border-color: var(--xs-primitive-navy-900, #1E3A8A);
  background: #FFFFFF;
}

/* ==========================================================================
   5. Archetype 4: Gravitational Vector Stage (중력 벡터 & 감쇠 무대)
   ========================================================================== */
[xs-stage="gravity"],
.xs-stage-gravity {
  position: relative;
  border-bottom: 3px solid var(--xs-border-strong, #1E293B);
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 20px;
}

.xs-gravity-vector-line {
  position: absolute;
  right: 12px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: repeating-linear-gradient(
    180deg,
    var(--xs-border-subtle, #CBD5E1) 0,
    var(--xs-border-subtle, #CBD5E1) 4px,
    transparent 4px,
    transparent 8px
  );
}

.xs-gravity-vector-line::after {
  content: "▼ 9.806m/s²";
  position: absolute;
  bottom: 0;
  right: 4px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 9px;
  color: var(--xs-text-muted, #64748B);
  white-space: nowrap;
}

/* ==========================================================================
   6. Archetype 5: Rotary Dial Stage (회전 극좌표 무대)
   ========================================================================== */
[xs-stage="rotary"],
.xs-stage-rotary {
  position: relative;
  background: var(--xs-bg-surface, #FFFFFF);
  border: 1px solid var(--xs-border-strong, #94A3B8);
  padding: 24px;
  text-align: center;
}

.xs-rotary-dial-rim {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 2px dashed var(--xs-border-strong, #64748B);
  position: relative;
  margin: 12px auto;
  cursor: grab;
  user-select: none;
}

.xs-rotary-dial-needle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50%;
  height: 2px;
  background: var(--xs-primitive-navy-900, #1E3A8A);
  transform-origin: 0% 50%;
  transform: rotate(0deg);
  pointer-events: none;
}

.xs-rotary-dial-needle::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 8px;
  height: 8px;
  background: var(--xs-primitive-navy-900, #1E3A8A);
  border-radius: 50%;
}

/* ==========================================================================
   7. Live Staging Controller Bar (실시간 연출 스위처 바)
   ========================================================================== */
.xs-stage-control-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 12px 16px;
  background: var(--xs-bg-subtle, #F1F5F9);
  border: 1px solid var(--xs-border-strong, #CBD5E1);
  margin-bottom: 20px;
}

.xs-stage-control-label {
  font-family: var(--xs-font-mono, monospace);
  font-size: 11px;
  font-weight: 700;
  color: var(--xs-text-secondary, #334155);
  text-transform: uppercase;
  margin-right: 8px;
}

.xs-stage-btn {
  font-family: var(--xs-font-mono, monospace);
  font-size: 11px;
  padding: 5px 10px;
  background: var(--xs-bg-surface, #FFFFFF);
  border: 1px solid var(--xs-border-strong, #94A3B8);
  color: var(--xs-text-primary, #0F172A);
  cursor: pointer;
  border-radius: 0;
  transition: all var(--xs-transition-fast, 120ms ease);
}

.xs-stage-btn:hover {
  background: var(--xs-primitive-slate-200, #E2E8F0);
}

.xs-stage-btn.is-active,
.xs-stage-btn[aria-pressed="true"] {
  background: var(--xs-primitive-navy-900, #1E3A8A);
  color: #FFFFFF;
  border-color: var(--xs-primitive-navy-900, #1E3A8A);
}

/* --- File: visual-modifiers.css --- */
/**
 * xsDesignSystem — Visual Staging Modifiers (v2.0.0)
 * Attribute-Driven Visual Staging Modules
 * Modifies component properties dynamically:
 * - xs-density="compact | normal | relaxed"
 * - xs-elevation="flat | raised | floating | sunken"
 * - xs-kinetic="idle | pulse | flow | rotate | detent"
 * - xs-precision="0.1mm | 0.01mm | 0.001mm"
 * - xs-accent="navy | sage | vermilion | amber | mono"
 * - xs-tension="rigid | damped | elastic"
 * - xs-blueprint="true | false"
 * Zero-AI Invariants: Spot Color <= 3%, APCA Lc >= 75, High-Precision Mechanical Aesthetics
 */

/* ==========================================================================
   1. Density Modifiers (밀도 속성 연출)
   ========================================================================== */
[xs-density="compact"],
.xs-density-compact {
  padding: 8px 12px !important;
  font-size: 12px !important;
  gap: 6px !important;
}

[xs-density="compact"] .carbon-btn,
[xs-density="compact"] .carbon-text-input,
[xs-density="compact"] .carbon-select {
  padding: 4px 8px !important;
  font-size: 11px !important;
  min-height: 28px !important;
}

[xs-density="compact"] .carbon-data-table th,
[xs-density="compact"] .carbon-data-table td {
  padding: 6px 10px !important;
  font-size: 11px !important;
}

[xs-density="relaxed"],
.xs-density-relaxed {
  padding: 32px 40px !important;
  font-size: 15px !important;
  gap: 20px !important;
}

[xs-density="relaxed"] .carbon-btn,
[xs-density="relaxed"] .carbon-text-input {
  padding: 12px 20px !important;
  font-size: 14px !important;
  min-height: 48px !important;
}

/* ==========================================================================
   2. Elevation & Machined Inset Modifiers (공간 고도 및 가공 홈 연출)
   ========================================================================== */
[xs-elevation="flat"],
.xs-elevation-flat {
  box-shadow: none !important;
  border-style: solid !important;
}

[xs-elevation="raised"],
.xs-elevation-raised {
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04) !important;
  transform: translateY(-1px);
  transition: transform 140ms ease, box-shadow 140ms ease;
}

[xs-elevation="floating"],
.xs-elevation-floating {
  box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05) !important;
  transform: translateY(-3px);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

[xs-elevation="sunken"],
.xs-elevation-sunken {
  background-color: var(--xs-bg-subtle, #F1F5F9) !important;
  box-shadow: inset 0 2px 4px rgba(15, 23, 42, 0.08), inset 0 1px 2px rgba(15, 23, 42, 0.06) !important;
  border-color: var(--xs-border-strong, #CBD5E1) !important;
}

/* ==========================================================================
   3. Kinetic & Pulse Modifiers (키네틱 위상 및 동역학 연출)
   ========================================================================== */
[xs-kinetic="pulse"],
.xs-kinetic-pulse {
  animation: xsKineticBreathing 3s ease-in-out infinite alternate;
}

@keyframes xsKineticBreathing {
  0% { border-color: var(--xs-border-subtle, #CBD5E1); }
  100% { border-color: var(--xs-primitive-navy-900, #1E3A8A); }
}

[xs-kinetic="flow"],
.xs-kinetic-flow {
  position: relative;
  overflow: hidden;
}

[xs-kinetic="flow"]::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--xs-primitive-navy-900, #1E3A8A), transparent);
  animation: xsKineticFlowStream 2s linear infinite;
}

@keyframes xsKineticFlowStream {
  0% { left: -100%; }
  100% { left: 100%; }
}

[xs-kinetic="detent"],
.xs-kinetic-detent {
  transition: transform 80ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[xs-kinetic="detent"]:active {
  transform: scale(0.985);
}

/* ==========================================================================
   4. Precision Calibration Modifiers (공학 정밀도 캘리브레이션 연출)
   ========================================================================== */
[xs-precision="0.1mm"] {
  border-left: 3px solid var(--xs-primitive-slate-700, #334155);
}

[xs-precision="0.01mm"],
.xs-precision-vernier {
  position: relative;
  border-left: 4px solid var(--xs-primitive-navy-900, #1E3A8A);
}

[xs-precision="0.01mm"]::before {
  content: "±0.01mm ISO 2768-m";
  position: absolute;
  top: -9px;
  right: 12px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 9px;
  background: var(--xs-bg-surface, #FFFFFF);
  padding: 0 4px;
  color: var(--xs-text-secondary, #475569);
  border: 1px solid var(--xs-border-subtle, #CBD5E1);
}

[xs-precision="0.001mm"],
.xs-precision-micro {
  position: relative;
  border: 1px solid var(--xs-primitive-navy-900, #1E3A8A);
  background-image: radial-gradient(var(--xs-border-subtle, #CBD5E1) 1px, transparent 1px);
  background-size: 8px 8px;
}

[xs-precision="0.001mm"]::before {
  content: "⌖ SUB-PIXEL 0.001mm CALIBRATED";
  position: absolute;
  bottom: -9px;
  left: 12px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 9px;
  background: var(--xs-primitive-navy-900, #1E3A8A);
  color: #FFFFFF;
  padding: 1px 6px;
  font-weight: 700;
}

/* ==========================================================================
   5. Spot Color Accent Modifiers (3% 스팟 컬러 경제학 테마 연출)
   ========================================================================== */
[xs-accent="navy"] {
  --xs-spot-color: var(--xs-primitive-navy-900, #1E3A8A);
  border-color: var(--xs-primitive-navy-900, #1E3A8A) !important;
}

[xs-accent="sage"] {
  --xs-spot-color: var(--xs-primitive-sage-700, #15803D);
  border-color: var(--xs-primitive-sage-700, #15803D) !important;
}

[xs-accent="vermilion"] {
  --xs-spot-color: var(--xs-primitive-red-600, #DC2626);
  border-color: var(--xs-primitive-red-600, #DC2626) !important;
}

[xs-accent="amber"] {
  --xs-spot-color: var(--xs-primitive-amber-600, #D97706);
  border-color: var(--xs-primitive-amber-600, #D97706) !important;
}

[xs-accent="mono"] {
  --xs-spot-color: var(--xs-primitive-slate-900, #0F172A);
  border-color: var(--xs-primitive-slate-900, #0F172A) !important;
}

/* ==========================================================================
   6. Interaction Tension Modifiers (생체역학적 텐션 반응 연출)
   ========================================================================== */
[xs-tension="rigid"] * {
  transition-duration: 0ms !important;
}

[xs-tension="damped"] * {
  transition: all 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

[xs-tension="elastic"] * {
  transition: all 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   7. Engineering Blueprint Mode (설계도면 청사진 연출)
   ========================================================================== */
[xs-blueprint="true"],
.xs-blueprint-mode {
  position: relative;
  background-color: var(--xs-bg-canvas, #F8FAFC) !important;
  background-image: 
    linear-gradient(var(--xs-border-subtle, #E2E8F0) 1px, transparent 1px),
    linear-gradient(90deg, var(--xs-border-subtle, #E2E8F0) 1px, transparent 1px) !important;
  background-size: 16px 16px !important;
  border: 1px solid var(--xs-border-strong, #64748B) !important;
}

/* Blueprint Corner Marks */
[xs-blueprint="true"]::before {
  content: "⌜";
  position: absolute;
  top: 2px;
  left: 4px;
  font-family: monospace;
  font-size: 14px;
  color: var(--xs-text-muted, #64748B);
  pointer-events: none;
}

[xs-blueprint="true"]::after {
  content: "⌟";
  position: absolute;
  bottom: 2px;
  right: 4px;
  font-family: monospace;
  font-size: 14px;
  color: var(--xs-text-muted, #64748B);
  pointer-events: none;
}

/* ==========================================================================
   8. Live Parameter Studio Inspector Panel
   ========================================================================== */
.xs-visual-studio-panel {
  background: var(--xs-bg-surface, #FFFFFF);
  border: 2px solid var(--xs-primitive-slate-900, #0F172A);
  padding: 20px;
  margin-bottom: 24px;
}

.xs-studio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.xs-studio-control {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.xs-studio-control label {
  font-family: var(--xs-font-mono, monospace);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--xs-text-secondary, #334155);
}

.xs-studio-select {
  padding: 6px 8px;
  font-family: var(--xs-font-mono, monospace);
  font-size: 12px;
  border: 1px solid var(--xs-border-strong, #94A3B8);
  background: var(--xs-bg-surface, #FFFFFF);
  color: var(--xs-text-primary, #0F172A);
}

/* --- File: adaptive-wrap.css --- */
/**
 * xsDesignSystem — Adaptive Semantic Wrapping & Multi-Environment Engine (v2.0.0)
 * 
 * Invariant Standards:
 * - W3C 3-Tier Token Architecture & HCI APCA Invariant (APCA Lc >= 75 / AAA 12:1)
 * - Zero-AI Visual Invariant (I_ai == 0.0)
 * - Typography HCI Invariant: Characters Per Line (CPL) constraints per environment
 * - Korean Semantic No-Break Grammar: Orphan particles, determiners, and unit binding
 */

/* ==========================================================================
   1. Semantic Wrapping Primitives & Classes
   ========================================================================== */

/* Keep Korean phrases together while breaking gracefully at word boundaries */
.xs-wrap-semantic,
[xs-wrap="semantic"] {
  word-break: keep-all;
  overflow-wrap: break-word;
  text-wrap: pretty;
  line-break: strict;
  font-optical-sizing: auto;
  font-variation-settings: 'opsz' auto;
}

/* Balanced headline / title wrapping for optimal optical weight distribution */
.xs-wrap-balance,
[xs-wrap="balance"] {
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Pretty body wrapping — eliminates single-word orphan lines (widows) */
.xs-wrap-pretty,
[xs-wrap="pretty"] {
  text-wrap: pretty;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Strict inline no-break */
.xs-no-break,
[xs-wrap="nowrap"] {
  white-space: nowrap !important;
  display: inline-block;
}

/* Atomic unit / particle binding */
.xs-unit-bundle,
.xs-semantic-particle {
  white-space: nowrap;
  display: inline;
}

/* ==========================================================================
   2. Characters Per Line (CPL) Typography Constraints
   ========================================================================== */

/* Mobile CPL: 18 - 32 characters for high-speed vertical saccadic flow */
.xs-cpl-mobile,
[xs-cpl="mobile"] {
  max-width: 32ch;
  line-height: var(--xs-line-height-mobile, 1.45);
}

/* Slide / Presentation CPL: 28 - 48 characters for rapid 3-second glanceability */
.xs-cpl-slide,
[xs-cpl="slide"] {
  max-width: 48ch;
  line-height: var(--xs-line-height-slide, 1.35);
  letter-spacing: -0.015em;
}

/* Desktop Body CPL: 45 - 75 characters for comfortable sustained reading */
.xs-cpl-desktop,
[xs-cpl="desktop"] {
  max-width: 75ch;
  line-height: var(--xs-line-height-desktop, 1.6);
}

/* Compact Micro-Copy CPL: 16 - 24 characters for cards, badges, alerts */
.xs-cpl-compact,
[xs-cpl="compact"] {
  max-width: 24ch;
  line-height: 1.3;
}

/* ==========================================================================
   3. Multi-Environment Adaptation Profiles (xs-env)
   ========================================================================== */

/* 3.1 Mobile Environment Profile */
[xs-env="mobile"],
.xs-env-mobile {
  --xs-container-max-w: 100%;
  --xs-content-padding: var(--cds-spacing-04, 16px);
  --xs-touch-target-min: 48px;
  --xs-grid-columns: 1;
  font-size: 14px;
}

[xs-env="mobile"] .carbon-btn,
[xs-env="mobile"] .carbon-input,
[xs-env="mobile"] .carbon-select,
[xs-env="mobile"] [role="button"],
.xs-env-mobile .carbon-btn,
.xs-env-mobile .carbon-input {
  min-height: var(--xs-touch-target-min, 48px);
  padding: var(--cds-spacing-03, 12px) var(--cds-spacing-04, 16px);
  width: 100%;
  box-sizing: border-box;
}

[xs-env="mobile"] .carbon-table-container,
.xs-env-mobile .carbon-table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 3.2 Tablet Environment Profile */
[xs-env="tablet"],
.xs-env-tablet {
  --xs-container-max-w: 768px;
  --xs-content-padding: var(--cds-spacing-05, 24px);
  --xs-touch-target-min: 44px;
  --xs-grid-columns: 2;
  font-size: 15px;
}

/* 3.3 Desktop Environment Profile */
[xs-env="desktop"],
.xs-env-desktop {
  --xs-container-max-w: 1280px;
  --xs-content-padding: var(--cds-spacing-06, 32px);
  --xs-touch-target-min: 40px;
  --xs-grid-columns: 3;
  font-size: 16px;
}

/* 3.4 16:9 Presentation Slide Environment Profile */
[xs-env="slide"],
.xs-env-slide {
  aspect-ratio: 16 / 9;
  width: 100%;
  max-width: 1920px;
  padding: var(--cds-spacing-07, 48px);
  background: var(--cds-background, #ffffff);
  color: var(--cds-text-primary, #161616);
  font-size: 20px;
  overflow: hidden;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

[xs-env="slide"] h1, [xs-env="slide"] .slide-title {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin-bottom: var(--cds-spacing-04, 16px);
}

[xs-env="slide"] h2, [xs-env="slide"] .slide-subtitle {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--cds-text-secondary, #525252);
  margin-bottom: var(--cds-spacing-05, 24px);
}

[xs-env="slide"] p, [xs-env="slide"] .slide-body {
  font-size: 1.125rem;
  line-height: 1.5;
  max-width: 48ch;
  word-break: keep-all;
}

/* 3.5 Print Environment Profile */
@media print {
  [xs-env="print"],
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt !important;
    line-height: 1.4 !important;
  }

  .carbon-btn,
  .carbon-pagination,
  .staging-rotary-dial,
  [role="toolbar"],
  nav,
  .carbon-skip-link {
    display: none !important;
  }

  .carbon-card,
  .carbon-tile,
  .carbon-data-table {
    border: 1pt solid #161616 !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    break-inside: avoid;
  }
}

[xs-env="print"],
.xs-env-print {
  background: #ffffff !important;
  color: #000000 !important;
  border: 1px solid #e0e0e0;
  padding: 24px;
}

/* 3.6 Embed / Widget / Dock Profile */
[xs-env="embed"],
.xs-env-embed {
  background: transparent;
  padding: var(--cds-spacing-03, 12px);
  font-size: 13px;
  border: 1px solid var(--cds-border-subtle, #e0e0e0);
  border-radius: 0;
  max-width: 100%;
}

[xs-env="embed"] .carbon-header {
  height: 36px;
  padding: 0 8px;
}

/* ==========================================================================
   4. High Contrast & Reduced Motion Overrides
   ========================================================================== */

/* APCA Lc 90+ High-Contrast Enforcement */
[xs-contrast="high"],
.xs-contrast-high {
  --cds-background: #ffffff !important;
  --cds-text-primary: #000000 !important;
  --cds-text-secondary: #262626 !important;
  --cds-border-strong: #000000 !important;
  --cds-border-subtle: #000000 !important;
  --cds-interactive: #000000 !important;
}

[xs-contrast="high"] .carbon-btn-primary,
.xs-contrast-high .carbon-btn-primary {
  background: #000000 !important;
  color: #ffffff !important;
  border: 2px solid #000000 !important;
}

[xs-contrast="high"] .carbon-btn-secondary,
.xs-contrast-high .carbon-btn-secondary {
  background: #ffffff !important;
  color: #000000 !important;
  border: 2px solid #000000 !important;
  font-weight: 700;
}

/* Motion-Reduction Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

[xs-motion="reduce"],
.xs-motion-reduce * {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}

/* ==========================================================================
   5. 3-Tier Semantic Wrapping & /visual-authoring Action Folding System (v2.5)
   - Tier 1: Lexical & Morphological Atomic Chunks (.xs-sem-chunk, .xs-sem-capsule)
   - Tier 2: Syntactic Clause Cadence Wrapping (.xs-sem-clause, .xs-sem-wbr)
   - Tier 3: /visual-authoring 4-Stage Semantic Action Chain (1x4 -> 2x2 -> 4x1)
   ========================================================================== */

/* Tier 1: Atomic Lexical & Metric Capsule (Never splits number + unit or arrow pair) */
.xs-sem-chunk,
.xs-sem-capsule {
  white-space: nowrap;
  display: inline;
}

.xs-sem-capsule--badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 7px;
  border-radius: 5px;
  background: var(--xs-bg-subtle, #F1F5F9);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  font-family: var(--xs-font-mono, monospace);
  font-size: 0.85em;
  font-weight: 600;
  white-space: nowrap;
  vertical-align: baseline;
}

/* Visual debug highlight mode for inspecting semantic chunks & clause boundaries */
[data-xs-wrap-inspect="true"] .xs-sem-chunk {
  background: rgba(37, 99, 235, 0.10);
  border-bottom: 1.5px solid rgba(37, 99, 235, 0.55);
  border-radius: 3px;
  padding: 0 2px;
}

/* Tier 2: Syntactic Clause Cadence Wrapper */
.xs-sem-clause-flow {
  word-break: keep-all;
  overflow-wrap: break-word;
  line-break: strict;
}

.xs-sem-clause {
  display: inline;
  white-space: nowrap;
}

/* On narrow mobile screens (< 420px), allow internal word-break inside long clauses while keeping NBSP chunks intact */
@media (max-width: 480px) {
  .xs-sem-clause {
    white-space: normal;
    word-break: keep-all;
  }
}

[data-xs-wrap-inspect="true"] .xs-sem-clause {
  box-shadow: inset 0 -2px 0 rgba(16, 185, 129, 0.45);
  margin-right: 2px;
}

[data-xs-wrap-inspect="true"] .xs-sem-clause::after {
  content: "↵";
  font-size: 0.7em;
  color: #059669;
  margin-left: 2px;
  opacity: 0.75;
}

/* Tier 3: /visual-authoring 4-Stage Semantic Action Chain Wrapper
   Eliminates 3+1 orphan wrapping by enforcing 1x4 (>=720cqi) -> 2x2 (480~719cqi) -> 4x1 (<480cqi) */
.xs-sem-stage-container {
  container-type: inline-size;
  container-name: xs-sem-stage;
  width: 100%;
}

.xs-sem-action-chain {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  align-items: stretch;
  width: 100%;
}

/* Medium Container (480px ~ 719px): Symmetric 2x2 Paired Folding (Never 3+1 orphan!) */
@container xs-sem-stage (max-width: 719px) {
  .xs-sem-action-chain {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Narrow Container (< 480px): 4x1 Vertical Causal Spine */
@container xs-sem-stage (max-width: 479px) {
  .xs-sem-action-chain {
    grid-template-columns: minmax(0, 1fr);
  }
  .xs-sem-action-node__arrow {
    transform: rotate(90deg);
  }
}

.xs-sem-action-node {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
  padding: 14px;
  border-radius: var(--xs-concentric-inner, 10px);
  background: var(--xs-surface-primary, #FFFFFF);
  border: 1px solid var(--xs-border-subtle, #E2E8F0);
  box-shadow: var(--xs-tactile-bevel-shadow, 0 1px 2px rgba(15, 23, 42, 0.04));
  transition: transform 180ms cubic-bezier(0.22, 1, 0.36, 1), border-color 180ms ease;
}

.xs-sem-action-node[data-stage-role="judgment"],
.xs-sem-action-node[data-stage-role="verification"] {
  border-color: color-mix(in srgb, var(--xs-color-accent, #0051FF) 35%, var(--xs-border-subtle, #E2E8F0));
}

.xs-sem-action-node__cue {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--xs-text-secondary, #475569);
}

.xs-sem-action-node__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--xs-bg-subtle, #F1F5F9);
  color: var(--xs-color-accent, #0051FF);
  font-weight: 800;
  font-size: 0.8rem;
  transition: transform 180ms ease;
}

/* /visual-authoring Label-Masked Read Mode (5-Second Visual Cue Test)
   Blurs explanatory prose while keeping visual cues, icons, arrows, and state geometry crisp */
[data-xs-masked-read="true"] .xs-sem-masked-prose {
  filter: blur(5px);
  opacity: 0.32;
  user-select: none;
  transition: filter 180ms ease, opacity 180ms ease;
}

.xs-sem-masked-prose {
  transition: filter 180ms ease, opacity 180ms ease;
}
