/* ============================================================
   THEME — Sketchbook
   -----------------------------------------------------------
   This is the ONE FILE users swap to reskin their site.
   Replace this file with any other theme.css to change the
   entire look & feel. Tokens only — no component CSS lives here.

   TOKEN CONTRACT
   -----------------------------------------------------------
   The authoritative contract lives in:
     - CONTRACT.md              (human-readable, grouped & typed)
     - scripts/theme-contract.json (machine-readable; validator input)

   Every theme MUST declare every required token, even if it
   sets a value to a neutral one (e.g. --blur-md: none;). That
   is what guarantees a clean one-file swap.

   Validate this file:
     node scripts/theme-validator.js public/theme.css
   ============================================================ */

@import url('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 {
  /* Surfaces — warm paper */
  --paper:        #F7F3EA;
  --paper-raised: #FDFAF2;
  --paper-sunk:   #ECE5D3;
  --paper-glass:  rgba(253, 250, 242, 0.75);

  /* Ink — warm pencil + sumi */
  --ink:        #2A241E;
  --ink-soft:   #4A4037;
  --ink-faint:  #726858;
  --graphite:   #3A332B;
  --muted:      #948977;

  /* Construction lines */
  --guide:      #C9BDA5;
  --guide-soft: #DDD4C0;
  --hair:       #D4CCBB;
  --hair-soft:  #E8E2D4;

  /* Primary accent — indigo */
  --ai:         #1F3A5F;
  --ai-ink:     #14263F;
  --ai-wash:    #E5EBF1;

  /* Seal — vermilion (reserve for emphasis) */
  --shu:        #C1272D;
  --shu-wash:   #F6E3E1;

  /* Draft / marginalia — warm gold */
  --ochre:      #A37B30;
  --ochre-wash: #F0E5CC;

  /* Code surface */
  --code-bg:     #2B2420;
  --code-ink:    #F7F3EA;
  --code-muted:  #A39787;
  --code-accent: #E5B660;
  --code-green:  #A8B86C;
  --code-blue:   #94AFC9;

  /* Typography */
  --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 */
  --r-sm: 2px;
  --r-md: 3px;
  --r-lg: 6px;

  /* Shadows — ink bleeding through paper */
  --shadow-sm: 0 1px 2px rgba(42, 36, 30, .06);
  --shadow-md: 0 4px 18px rgba(42, 36, 30, .08);
  --shadow-lg: 0 12px 40px rgba(42, 36, 30, .12);
  --shadow-xl: 0 20px 50px rgba(42, 36, 30, .16);
  --shadow-2xl: 0 28px 70px rgba(42, 36, 30, .22);

  /* Blur — paper themes don't use it; declared so swap stays lossless */
  --blur-sm: none;
  --blur-md: none;
  --blur-lg: none;

  /* Glow — faint ink bleed, not phosphor */
  --glow-sm: 0 0 0 transparent;
  --glow-md: 0 0 0 transparent;
  --glow-lg: 0 0 0 transparent;

  /* Motion */
  --duration-fast:   180ms;
  --duration-normal: 240ms;
  --duration-slow:   380ms;
  --ease:            cubic-bezier(0.33, 0.66, 0.33, 1);

  /* ----------------------------------------------------------
     SEMANTIC ALIASES
     -----------------------------------------------------------
     Bridge the library's expected names to this theme's native
     palette. Components can now write m.color(surface-default)
     or var(--surface-default) and reskin with the theme
     automatically.
     ---------------------------------------------------------- */

  /* Backgrounds (page-level) */
  --background-default: var(--paper);
  --background-subtle:  var(--paper-sunk);
  --background-navbar:  var(--paper-raised);

  /* Surfaces */
  --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 */
  --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);

  /* Borders */
  --border-default:    var(--hair);
  --border-subtle:     var(--hair-soft);
  --border-emphasis:   var(--ink);
  --border-focus:      var(--ai);

  /* Interactive (hover / active wash layers) */
  --interactive-hover:  rgba(42, 36, 30, 0.06);
  --interactive-active: rgba(42, 36, 30, 0.12);

  /* Brand (identity — action-primary usually references these) */
  --brand-primary:        var(--ai);
  --brand-primary-hover:  var(--ai-ink);

  /* Action (primary / secondary / tertiary) */
  --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 / status (high-level semantic) */
  --feedback-info:     var(--ai);
  --feedback-success:  var(--code-green);
  --feedback-warning:  var(--ochre);
  --feedback-error:    var(--shu);

  /* Status — info (three-part: default / subtle / text) */
  --info-default: var(--ai);
  --info-subtle:  var(--ai-wash);
  --info-text:    var(--ai-ink);

  /* Status — success */
  --success-default: #5A7A3A;
  --success-subtle:  #EAEFDC;
  --success-text:    #3F5627;

  /* Status — warning */
  --warning-default: var(--ochre);
  --warning-subtle:  var(--ochre-wash);
  --warning-text:    #6B4E1E;

  /* Status — error */
  --error-default: var(--shu);
  --error-subtle:  var(--shu-wash);
  --error-text:    #7A1A1F;

  /* ----------------------------------------------------------
     LIBRARY SCALES (space / radius / type / motion / z)
     -----------------------------------------------------------
     The library mixins emit var(--space-<key>), var(--radius-<key>),
     var(--font-primary), var(--font-size-<key>), var(--z-<key>), …
     Themes declare the slots so those mixins always resolve.
     Override any of these to change the whole system's rhythm.
     ---------------------------------------------------------- */

  /* Space scale (rem for accessibility) */
  --space-2xs: 0.25rem;
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;

  /* Radius alias — mirrors --r-* with standard names so
     `m.radius(size)` in the library finds --radius-<size>. */
  --radius-sm:   var(--r-sm);
  --radius-md:   var(--r-md);
  --radius-lg:   var(--r-lg);
  --radius-xl:   0.75rem;
  --radius-full: 9999px;

  /* Typography — base body font + key scale slots */
  --font-primary: var(--font-sans);
  --font-size-base: 1rem;
  --line-height-normal: 1.5;
  --font-weight-medium: 500;

  /* Z-index layers */
  --z-sticky:   1020;
  --z-dropdown: 1030;
  --z-backdrop: 1040;
  --z-modal:    1050;
  --z-popover:  1060;
  --z-tooltip:  1070;
}