@charset "UTF-8";
@import 'https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Caveat:wght@400;500;600;700&family=Noto+Serif+JP:wght@400;500;700&family=Noto+Sans+JP:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500;700&display=swap';
:root, :root[data-theme=sketchbook] {
  color-scheme: light dark;
  /* Surfaces — warm paper / warm charcoal paper */
  --paper: light-dark(#F7F3EA, #1A1815);
  --paper-raised: light-dark(#FDFAF2, #2A2520);
  --paper-sunk: light-dark(#ECE5D3, #11100E);
  --paper-glass: light-dark(rgba(253, 250, 242, 0.75), rgba(42, 37, 32, 0.78));
  /* Ink — warm pencil + sumi / warm cream */
  --ink: light-dark(#2A241E, #F4EFE2);
  --ink-soft: light-dark(#4A4037, #D8D0BE);
  --ink-faint: light-dark(#726858, #A89E89);
  --graphite: light-dark(#3A332B, #E8E0CE);
  --muted: light-dark(#948977, #7A715F);
  /* Construction lines */
  --guide: light-dark(#C9BDA5, #4A4239);
  --guide-soft: light-dark(#DDD4C0, #382F27);
  --hair: light-dark(#D4CCBB, #3F362C);
  --hair-soft: light-dark(#E8E2D4, #2A241E);
  /* Primary accent — indigo (lifted for dark paper) */
  --ai: light-dark(#1F3A5F, #6E8FBF);
  --ai-ink: light-dark(#14263F, #8DA8D1);
  --ai-wash: light-dark(#E5EBF1, #1F2B3F);
  /* Seal — vermilion (warm, brightens slightly on dark) */
  --shu: light-dark(#C1272D, #E36148);
  --shu-wash: light-dark(#F6E3E1, #3A1A14);
  /* Draft / marginalia — warm gold */
  --ochre: light-dark(#A37B30, #D4A04B);
  --ochre-wash: light-dark(#F0E5CC, #382B14);
  /* Code surface — inverts intentionally */
  --code-bg: light-dark(#2B2420, #F7F3EA);
  --code-ink: light-dark(#F7F3EA, #2B2420);
  --code-muted: light-dark(#A39787, #6B5E50);
  --code-accent: light-dark(#E5B660, #836327);
  --code-green: light-dark(#A8B86C, #537136);
  --code-blue: light-dark(#94AFC9, #1F3A5F);
  /* Typography — identical across modes */
  --font-display: 'DM Serif Display', 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-script: 'Caveat', 'Shadows Into Light', cursive;
  --font-serif: 'Noto Serif JP', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, Menlo, monospace;
  /* Radius — identical */
  --r-sm: 2px;
  --r-md: 3px;
  --r-lg: 6px;
  /* Shadows — ink bleeding through paper / deep drop on charcoal */
  --shadow-sm: 0 1px 2px light-dark(rgba(42, 36, 30, 0.06), rgba(0, 0, 0, 0.35));
  --shadow-md: 0 4px 18px light-dark(rgba(42, 36, 30, 0.08), rgba(0, 0, 0, 0.45));
  --shadow-lg: 0 12px 40px light-dark(rgba(42, 36, 30, 0.12), rgba(0, 0, 0, 0.55));
  --shadow-xl: 0 20px 50px light-dark(rgba(42, 36, 30, 0.16), rgba(0, 0, 0, 0.65));
  --shadow-2xl: 0 28px 70px light-dark(rgba(42, 36, 30, 0.22), rgba(0, 0, 0, 0.75));
  /* Blur / glow — paper themes don't use either */
  --blur-sm: none;
  --blur-md: none;
  --blur-lg: none;
  --glow-sm: 0 0 0 transparent;
  --glow-md: 0 0 0 transparent;
  --glow-lg: 0 0 0 transparent;
  /* Motion — editorial pace, identical */
  --duration-fast: 180ms;
  --duration-normal: 240ms;
  --duration-slow: 380ms;
  --ease: cubic-bezier(0.33, 0.66, 0.33, 1);
  /* Semantic aliases */
  --background-default: var(--paper);
  --background-subtle: var(--paper-sunk);
  --background-navbar: var(--paper-raised);
  --surface-default: var(--paper);
  --surface-raised: var(--paper-raised);
  --surface-sunk: var(--paper-sunk);
  --surface-muted: var(--paper-sunk);
  --surface-subtle: var(--paper-raised);
  --surface-emphasis: var(--ink);
  --surface-glass: var(--paper-glass);
  --text-primary: var(--ink);
  --text-secondary: var(--ink-soft);
  --text-muted: var(--ink-faint);
  --text-tertiary: var(--muted);
  --text-inverse: var(--paper);
  --text-link: var(--ai);
  --text-link-hover: var(--ai-ink);
  --border-default: var(--hair);
  --border-subtle: var(--hair-soft);
  --border-emphasis: light-dark(var(--ink), var(--guide));
  --border-focus: var(--ai);
  --interactive-hover: light-dark(rgba(42, 36, 30, 0.06), rgba(244, 239, 226, 0.06));
  --interactive-active: light-dark(rgba(42, 36, 30, 0.12), rgba(244, 239, 226, 0.12));
  --brand-primary: var(--ai);
  --brand-primary-hover: var(--ai-ink);
  --action-primary-default: var(--ai);
  --action-primary-hover: var(--ai-ink);
  --action-primary-active: var(--ai-ink);
  --action-primary-wash: var(--ai-wash);
  --action-secondary-default: var(--shu);
  --action-secondary-hover: var(--shu);
  --action-secondary-active: var(--shu);
  --action-secondary-wash: var(--shu-wash);
  --action-tertiary-default: var(--ochre);
  --action-tertiary-hover: var(--ochre);
  --action-tertiary-active: var(--ochre);
  --action-tertiary-wash: var(--ochre-wash);
  --feedback-info: var(--ai);
  --feedback-success: var(--code-green);
  --feedback-warning: var(--ochre);
  --feedback-error: var(--shu);
  --info-default: var(--ai);
  --info-subtle: var(--ai-wash);
  --info-text: var(--ai-ink);
  --success-default: light-dark(#5A7A3A, #8DA86A);
  --success-subtle: light-dark(#EAEFDC, #1F2B14);
  --success-text: light-dark(#3F5627, #B8CC8E);
  --warning-default: var(--ochre);
  --warning-subtle: var(--ochre-wash);
  --warning-text: light-dark(#6B4E1E, #E8BF6E);
  --error-default: var(--shu);
  --error-subtle: var(--shu-wash);
  --error-text: light-dark(#7A1A1F, #F08A72);
  /* Library scales — identical */
  /* Spacing rhythm — THE knob for how dense or airy this theme feels.
     The numbered scale is the source of truth: every component reads
     var(--space-N), and the t-shirt aliases (--space-md, --space-lg …)
     are emitted by the library as references to these, so they follow
     automatically. Change a value here and the whole page re-proportions.
     Halve them for a compact UI; raise 4/5/6 for an airy editorial feel. */
  --space-0: 0; /* flush            */
  --space-1: 0.5rem; /* tight inner gap  */
  --space-2: 0.75rem; /* control padding  */
  --space-3: 0.875rem; /* (no t-shirt)     */
  --space-4: 1rem; /* default rhythm   */
  --space-5: 1.5rem; /* section gap      */
  --space-6: 2rem; /* block gap        */
  --space-7: 3rem; /* major gap        */
  --space-8: 4rem; /* page section     */
  --space-9: 6rem; /* hero rhythm      */
  /* T-shirt aliases - var() references into this theme's numbered scale,
     so re-tuning a numbered step re-tunes its alias automatically. */
  --space-xs: var(--space-1);
  --space-sm: var(--space-2);
  --space-md: var(--space-4);
  --space-lg: var(--space-5);
  --space-xl: var(--space-6);
  --space-2xl: var(--space-7);
  --space-3xl: var(--space-8);
  --space-4xl: var(--space-9);
  --radius-sm: var(--r-sm);
  --radius-md: var(--r-md);
  --radius-lg: var(--r-lg);
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
  --font-primary: var(--font-sans);
  --font-size-base: 1rem;
  --line-height-normal: 1.5;
  --font-weight-medium: 500;
  --z-sticky: 1020;
  --z-dropdown: 1030;
  --z-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}