@import 'tailwindcss';
@import 'tw-animate-css';

/* SUMI generated tokens — Single source of truth. See packages/design-system/tokens/.
   This adds --color-* primitives and --sumi-* semantics (bg/text/accent/viz/feedback).
   The legacy :root block below still defines additional --sumi-* vars (typography, motion,
   z-index, glass…) pending migration to tokens.json (Sprint 2 follow-up). */
@import '@veza/design-system/tokens.css';

@custom-variant dark (&:is([data-theme="dark"] *));

/* ╔══════════════════════════════════════════════════════════════════════════╗
   ║  SUMI DESIGN SYSTEM v3.0 — "Lavis d'encre" (墨の濃淡)                  ║
   ║  VEZA × TALAS — Single Source of Truth                                  ║
   ║  Ink wash aesthetic — contrast, wabi-sabi, ma (間)                      ║
   ║  Accent: Mizu cyan (#0098B5) — the only color in monochrome ink wash   ║
   ╚══════════════════════════════════════════════════════════════════════════╝ */

/* ═══ @font-face — Self-hosted woff2 ═══ */
@font-face {
  font-family: 'Space Grotesk';
  src: url('/fonts/SpaceGrotesk-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('/fonts/Inter-Variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* ═══════════════════════════════════════════════════════════════════════════
   DARK THEME (default) — Sumi ink on void (墨の闇)
   ═══════════════════════════════════════════════════════════════════════════ */
:root, [data-theme="dark"] {
  /* ═══ BACKGROUNDS — Ink dilutions (墨の濃淡) ═══ */
  --sumi-bg-void:      #0A0A0C;
  --sumi-bg-base:      #0D0D0F;
  --sumi-bg-raised:    #141416;
  --sumi-bg-overlay:   #1A1A1E;
  --sumi-bg-hover:     #222226;
  --sumi-bg-active:    #2A2A2F;
  --sumi-bg-wash:      #111113;

  /* ═══ SURFACES — Ink planes (墨面) ═══ */
  --sumi-surface-inset:    #0B0B0D;
  --sumi-surface-subtle:   #161618;
  --sumi-surface-card:     #141416;
  --sumi-surface-elevated: #1A1A1E;

  /* ═══ BORDERS — Ink lines (筆線) ═══ */
  --sumi-border-faint:   rgba(232,227,219, 0.03);
  --sumi-border-default: rgba(232,227,219, 0.06);
  --sumi-border-strong:  rgba(232,227,219, 0.10);
  --sumi-border-focus:   rgba(0,152,181, 0.50);
  --sumi-border-accent:  rgba(0,152,181, 0.25);

  /* ═══ TEXT — Ink on washi (墨と和紙) ═══ */
  --sumi-text-primary:   #E8E3DB;
  --sumi-text-secondary: #9A958D;
  --sumi-text-tertiary:  #6B6660;
  --sumi-text-disabled:  #3D3A35;
  --sumi-text-inverse:   #F2EDE6;
  --sumi-text-link:      #0098B5;

  /* ═══ PIGMENT — Mizu cyan (水) — the only color ═══ */
  --sumi-accent:           #0098B5;
  --sumi-accent-hover:     #00B4D8;
  --sumi-accent-active:    #007A94;
  --sumi-accent-muted:     rgba(0,152,181, 0.18);
  --sumi-accent-subtle:    rgba(0,152,181, 0.06);
  --sumi-accent-emphasis:  #006B7F;

  /* ═══ FUNCTIONAL — Diluted pastels only (never solid fills) ═══ */
  --sumi-error:            rgba(180,80,70, 0.55);
  --sumi-error-hover:      rgba(180,80,70, 0.65);
  --sumi-error-subtle:     rgba(180,80,70, 0.10);

  --sumi-sage:             rgba(90,140,100, 0.60);
  --sumi-sage-hover:       rgba(90,140,100, 0.70);
  --sumi-sage-subtle:      rgba(90,140,100, 0.10);

  --sumi-gold:             rgba(190,150,60, 0.55);
  --sumi-gold-hover:       rgba(190,150,60, 0.65);
  --sumi-gold-subtle:      rgba(190,150,60, 0.10);

  /* ═══ 金 — KIN (GOLD LEAF) ═══ */
  --sumi-kin:              #b8860b;
  --sumi-kin-hover:        #c8960b;
  --sumi-kin-subtle:       rgba(184,134,11, 0.08);

  /* ═══ LEGACY ALIASES — backwards compat (components still reference these) ═══ */
  --sumi-vermillion:       #a04050;
  --sumi-vermillion-hover: #b05060;
  --sumi-vermillion-subtle: rgba(160,64,80, 0.10);

  /* PATINA — runtime state, mutated by ThemeProvider per account age.
     grain-opacity is theme-dependent (overridden in [data-theme="light"] below). */
  --sumi-patina-warmth:    0deg;
  --sumi-grain-opacity:    0.04;

  /* Tokenized in @veza/design-system/tokens.css (theme-independent):
       - 墨の六色 ink tones (--sumi-ink-{kuro,sumi,usuzumi,hai,gin,kasumi})
       - 和紙 washi tones (--sumi-washi-*)
       - mizu/ai/vermillion aliases
       - circadian state (--sumi-circadian-warmth/brightness)
       - semantic aliases (--sumi-{success,warning,info,live,online,error-semantic}*)
       - typography (--sumi-font-*, --sumi-text-{xs..4xl}, --sumi-{leading,tracking,weight}-*)
       - spacing + radius (--sumi-space-*, --sumi-radius-*) */

  /* ═══ SHADOWS — Ink diffusion (滲み) — omnidirectional ═══ */
  --sumi-shadow-xs:    0 0 4px rgba(26,26,30, 0.03);
  --sumi-shadow-sm:    0 0 8px rgba(26,26,30, 0.05);
  --sumi-shadow-md:    0 0 16px rgba(26,26,30, 0.08);
  --sumi-shadow-lg:    0 0 24px rgba(26,26,30, 0.10);
  --sumi-shadow-xl:    0 0 32px rgba(26,26,30, 0.15);
  --sumi-shadow-2xl:   0 0 48px rgba(26,26,30, 0.20);
  --sumi-shadow-glow:  0 0 0 3px rgba(0,152,181, 0.25);
  --sumi-shadow-glow-lg: 0 0 20px rgba(0,152,181, 0.12);
  --sumi-shadow-kin:   0 0 16px rgba(184,134,11, 0.15);

  /* ═══ GLASS — Shoji screen (障子) ═══ */
  --sumi-glass-bg:     rgba(13,13,15, 0.80);
  --sumi-glass-border: rgba(232,227,219, 0.04);
  --sumi-glass-blur:   12px;

  /* ═══ SCROLLBAR ═══ */
  --sumi-scrollbar-track: transparent;
  --sumi-scrollbar-thumb: rgba(232,227,219, 0.06);
  --sumi-scrollbar-hover: rgba(232,227,219, 0.12);

  /* Tokenized in @veza/design-system/tokens.css (theme-independent):
       - motion (--sumi-motion-{goutte,trait,lavis,vague,maree})
       - duration aliases (--sumi-duration-{instant,fast,normal,slow,slower})
       - easings (--sumi-ease-{goutte,trait,lavis,vague,maree,rebond,default,out,in,in-out,bounce,spring})
       - transition shorthands (--sumi-transition-{colors,opacity,transform,shadow})
       - z-index scale (--sumi-z-*)
       - layout primitives (--sumi-{max-width,max-width-content,max-width-narrow,max-width-prose,sidebar-width,sidebar-collapsed,header-height,player-height}) */

  /* Non-prefixed legacy aliases (Tailwind utilities still reference these — KEEP) */
  --duration-fast:   var(--sumi-motion-trait);
  --duration-normal: var(--sumi-motion-lavis);

  /* ═══ CONTEXTUAL ACCENTS (feature-specific) ═══ */
  --graffiti-magenta: #a04050;
  --gaming-gold:     #b8860b;
  --terminal-green:  #4f6840;
  --sakura:          #d4a0b0;
  --sumi-mizu:       #0098B5;  /* 水 — mizu cyan accent */
  --sumi-ai:         #2a4e68;  /* 藍 — indigo */

  /* ═══ SHADCN/RADIX SEMANTIC MAPPING ═══ */
  --background:             var(--sumi-bg-base);
  --foreground:             var(--sumi-text-primary);
  --card:                   var(--sumi-surface-card);
  --card-foreground:        var(--sumi-text-primary);
  --popover:                var(--sumi-bg-overlay);
  --popover-foreground:     var(--sumi-text-primary);
  --primary:                var(--sumi-accent);
  --primary-foreground:     var(--sumi-text-inverse);
  --secondary:              var(--sumi-bg-hover);
  --secondary-foreground:   var(--sumi-text-primary);
  --muted:                  var(--sumi-bg-hover);
  --muted-foreground:       var(--sumi-text-secondary);
  --accent:                 var(--sumi-bg-hover);
  --accent-foreground:      var(--sumi-text-primary);
  --destructive:            var(--sumi-error);
  --destructive-foreground: #E8E3DB;
  --success:                var(--sumi-success);
  --success-foreground:     #E8E3DB;
  --warning:                var(--sumi-warning);
  --warning-foreground:     var(--sumi-text-inverse);
  --info:                   var(--sumi-info);
  --info-foreground:        var(--sumi-text-inverse);
  --border:                 var(--sumi-border-default);
  --input:                  var(--sumi-border-default);
  --ring:                   var(--sumi-border-focus);
  --radius:                 var(--sumi-radius-md);

  /* Charts */
  --chart-1: var(--sumi-accent);
  --chart-2: var(--sumi-error);
  --chart-3: var(--sumi-sage);
  --chart-4: var(--sumi-gold);
  --chart-5: #8b7ec8;

  /* Sidebar mapping */
  --sidebar:                    var(--sumi-bg-raised);
  --sidebar-foreground:         var(--sumi-text-secondary);
  --sidebar-primary:            var(--sumi-accent);
  --sidebar-primary-foreground: var(--sumi-text-primary);
  --sidebar-accent:             var(--sumi-accent-subtle);
  --sidebar-accent-foreground:  var(--sumi-text-primary);
  --sidebar-border:             var(--sumi-border-faint);
  --sidebar-ring:               var(--sumi-accent);

  /* Sidebar active item indicator */
  --sidebar-active-indicator: inset 2px 0 0 0 var(--sidebar-primary);

  /* ═══ LAYOUT PRIMITIVES (preserved from previous system) ═══ */
  --layout-content-max-width: 100rem;
  --layout-main-min-height: calc(100vh - 4rem);
  --layout-page-min-height: 37.5rem;
  --layout-page-min-height-sm: 25rem;
  --layout-story-decorator-min-height: 12rem;
  --layout-gap: 1rem;
  --layout-gap-sm: 0.75rem;
  --layout-gap-lg: 1.5rem;
  --layout-drawer-max-height: 60vh;
  --layout-panel-max-height: 70vh;
  --layout-list-max-height: 25rem;
  --layout-modal-max-height: 85vh;
  --layout-modal-max-height-sm: 80vh;
  --layout-modal-max-height-xs: 70vh;
  --layout-modal-max-height-lg: 90vh;
  --layout-lyrics-height: 60vh;
  --layout-lyrics-height-sm: 50vh;
  --layout-chat-height: calc(100vh - 6.25rem);
  --layout-chat-main-height: calc(100vh - 6rem);
  --layout-stream-height: calc(100vh - 6rem);
  --layout-modal-full-height: calc(100vh - 2rem);

  /* App shell — header, main offsets and margins (sidebar-driven) */
  --header-height: 4rem;
  --main-offset-top: 5rem;
  --main-offset-bottom: 9rem;
  --mobile-bottom-nav-height: 4rem;
  --main-margin-left-expanded: 18rem;
  --main-margin-left-collapsed: 7rem;
  --header-left-expanded: 18rem;
  --header-left-collapsed: 5rem;

  /* Sidebar layout */
  --sidebar-width-expanded: 15rem;
  --sidebar-width-collapsed: 5rem;
  --sidebar-offset-left: 1.5rem;
  --sidebar-offset-top: 5rem;
  --sidebar-offset-bottom: 1.5rem;
  --sidebar-z-index: 95;
  --sidebar-overlay-z-index: 90;
  --player-z-index: var(--sumi-z-sticky);
}

/* ═══════════════════════════════════════════════════════════════════════════
   LIGHT THEME — Washi Paper (和紙) — Ink on warm paper
   ═══════════════════════════════════════════════════════════════════════════ */
[data-theme="light"] {
  /* All --sumi-* light theme overrides tokenized in @veza/design-system/tokens.css
     (see semantic/light.json — byte-for-byte preservation of former tuned values).
     This block keeps only app-specific shadcn/Radix overrides for light theme. */

  --primary-foreground: #F2EDE6;
}

/* ═══════════════════════════════════════════════════════════════════════════
   HIGH CONTRAST MODE — 極墨 (Extreme Ink) — WCAG AA 4.5:1+
   ═══════════════════════════════════════════════════════════════════════════ */
[data-theme="dark"][data-contrast="high"] {
  --sumi-bg-void:      #000000;
  --sumi-bg-base:      #050506;
  --sumi-bg-raised:    #0D0D0F;
  --sumi-bg-overlay:   #141416;
  --sumi-bg-hover:     #1E1E22;
  --sumi-bg-active:    #262628;
  --sumi-text-primary:   #ffffff;
  --sumi-text-secondary: #D5D0C8;
  --sumi-text-tertiary:  #B0ABA3;
  --sumi-border-default: rgba(232,227,219, 0.25);
  --sumi-border-faint:   rgba(232,227,219, 0.12);
  --sumi-border-strong:  rgba(232,227,219, 0.40);
  --sumi-accent:         #00C4E8;
  --sumi-accent-hover:   #00D8FF;
}

[data-theme="light"][data-contrast="high"] {
  --sumi-bg-void:      #ffffff;
  --sumi-bg-base:      #FDFCF8;
  --sumi-bg-raised:    #F8F5EE;
  --sumi-bg-overlay:   #F0ECE2;
  --sumi-bg-hover:     #E5E0D5;
  --sumi-bg-active:    #D8D2C5;
  --sumi-text-primary:   #000000;
  --sumi-text-secondary: #1A1A1E;
  --sumi-text-tertiary:  #3D3A35;
  --sumi-border-default: rgba(26,26,30, 0.25);
  --sumi-border-faint:   rgba(26,26,30, 0.12);
  --sumi-border-strong:  rgba(26,26,30, 0.40);
  --sumi-accent:         #005A6B;
  --sumi-accent-hover:   #004A58;
}

/* ═══════════════════════════════════════════════════════════════════════════
   DENSITY MODES — compact reduces spacing ~25%
   ═══════════════════════════════════════════════════════════════════════════ */
[data-density="compact"] {
  --sumi-space-0-5: 1.5px;
  --sumi-space-1:   3px;
  --sumi-space-1-5: 4.5px;
  --sumi-space-2:   6px;
  --sumi-space-2-5: 7.5px;
  --sumi-space-3:   9px;
  --sumi-space-4:   12px;
  --sumi-space-5:   15px;
  --sumi-space-6:   18px;
  --sumi-space-8:   24px;
  --sumi-space-10:  30px;
  --sumi-space-12:  36px;
  --sumi-space-16:  48px;
  --sumi-space-20:  60px;
  --sumi-text-base: 0.8125rem;
}

[data-density="comfortable"] {
  font-size: 1rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOCUS VISIBLE — distinct ring for keyboard navigation
   ═══════════════════════════════════════════════════════════════════════════ */
:focus-visible {
  outline: 2px solid var(--sumi-accent);
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TAILWIND THEME MAPPING
   ═══════════════════════════════════════════════════════════════════════════ */
@theme inline {
  /* Typography */
  --font-sans:     var(--sumi-font-body);
  --font-heading:  var(--sumi-font-heading);
  --font-mono:     var(--sumi-font-mono);
  --font-serif:    var(--sumi-font-serif);

  /* Semantic color mapping to Tailwind utilities */
  --color-background:             var(--background);
  --color-foreground:             var(--foreground);
  --color-card:                   var(--card);
  --color-card-foreground:        var(--card-foreground);
  --color-popover:                var(--popover);
  --color-popover-foreground:     var(--popover-foreground);
  --color-primary:                var(--primary);
  --color-primary-foreground:     var(--primary-foreground);
  --color-secondary:              var(--secondary);
  --color-secondary-foreground:   var(--secondary-foreground);
  --color-muted:                  var(--muted);
  --color-muted-foreground:       var(--muted-foreground);
  --color-accent:                 var(--accent);
  --color-accent-foreground:      var(--accent-foreground);
  --color-destructive:            var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border:                 var(--border);
  --color-input:                  var(--input);
  --color-ring:                   var(--ring);

  /* Extended semantic */
  --color-success:          var(--success);
  --color-success-foreground: var(--success-foreground);
  --color-warning:          var(--warning);
  --color-warning-foreground: var(--warning-foreground);
  --color-info:             var(--info);
  --color-info-foreground:  var(--info-foreground);

  /* SUMI direct accent access */
  --color-sumi-accent:      var(--sumi-accent);
  --color-sumi-vermillion:  var(--sumi-vermillion);
  --color-sumi-sage:        var(--sumi-sage);
  --color-sumi-gold:        var(--sumi-gold);
  --color-gaming-gold:      var(--sumi-gold);
  --color-terminal-green:   #3eaa5e;
  --color-graffiti-magenta: #c840a0;
  --color-sakura:           #d090a8;
  --color-sumi-mizu:        var(--sumi-mizu);
  --color-sumi-kin:         var(--sumi-kin);
  --color-sumi-ai:          var(--sumi-ai);

  /* Chart colors */
  --color-chart-1: var(--chart-1);
  --color-chart-2: var(--chart-2);
  --color-chart-3: var(--chart-3);
  --color-chart-4: var(--chart-4);
  --color-chart-5: var(--chart-5);

  /* Shadows — wired to SUMI tokens (auto dark/light) */
  --shadow-xs:   var(--sumi-shadow-xs);
  --shadow-sm:   var(--sumi-shadow-sm);
  --shadow-md:   var(--sumi-shadow-md);
  --shadow-lg:   var(--sumi-shadow-lg);
  --shadow-xl:   var(--sumi-shadow-xl);
  --shadow-2xl:  var(--sumi-shadow-2xl);
  /* Card-specific shadows */
  --shadow-card:       var(--sumi-shadow-sm);
  --shadow-card-hover: var(--sumi-shadow-md);

  /* Radius */
  --radius-sm:   var(--sumi-radius-sm);
  --radius-md:   var(--sumi-radius-md);
  --radius-lg:   var(--sumi-radius-lg);
  --radius-xl:   var(--sumi-radius-xl);
  --radius-2xl:  var(--sumi-radius-2xl);
  --radius-full: var(--sumi-radius-full);

  /* Sidebar */
  --color-sidebar:                    var(--sidebar);
  --color-sidebar-foreground:         var(--sidebar-foreground);
  --color-sidebar-primary:            var(--sidebar-primary);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-accent:             var(--sidebar-accent);
  --color-sidebar-accent-foreground:  var(--sidebar-accent-foreground);
  --color-sidebar-border:             var(--sidebar-border);
  --color-sidebar-ring:               var(--sidebar-ring);
}

/* ═══════════════════════════════════════════════════════════════════════════
   BASE STYLES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer base {
  * {
    @apply border-border outline-ring/50;
  }

  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    @apply bg-background text-foreground;
    font-size: var(--sumi-font-size-base);
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  }

  /* ═══ SUMI v3 — Washi fiber grain (和紙繊維) ═══
     Anisotropic noise simulating washi paper fiber direction.
     baseFrequency 0.4x0.9 = horizontal fibers. 5 octaves = fine detail.
     GPU-composited via position:fixed. */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background:
      url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='w'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.4 0.9' numOctaves='5' stitchTiles='stitch' seed='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23w)'/%3E%3C/svg%3E");
    opacity: var(--sumi-grain-opacity, 0.04);
    pointer-events: none;
    z-index: 9998;
    mix-blend-mode: soft-light;
  }

  /* ═══ SUMI v3 — Subtle ink wash vignette (墨暈し) ═══
     Very faint radial light at top-center, like a distant lamp on canvas. */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(210,195,168, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(180,165,135, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }

  /* ═══ SUMI v3 — Circadian + Patina filter ═══
     Applied on #root to avoid affecting the grain layer.
     hue-rotate shifts warmth. brightness adjusts for time of day.
     Transition is 5 min (300s) so changes are imperceptible. */
  #root {
    filter:
      hue-rotate(calc(var(--sumi-circadian-warmth) + var(--sumi-patina-warmth, 0deg)))
      brightness(var(--sumi-circadian-brightness));
    transition: filter 300s linear;
  }

  /* Eco mode — disable all cosmetic layers */
  [data-eco="true"] body::after { display: none; }
  [data-eco="true"] body::before { display: none; }
  [data-eco="true"] #root { filter: none; transition: none; }

  /* Respect reduced motion */
  @media (prefers-reduced-motion: reduce) {
    body::after { display: none; }
    body::before { display: none; }
    #root { filter: none; transition: none; }
  }

  /* ═══ SUMI v3 — Patina levels (墨の歳月) ═══ */
  [data-patina="1"] { --sumi-grain-opacity: 0.05; }
  [data-patina="2"] { --sumi-grain-opacity: 0.06; }
  [data-patina="3"] {
    --sumi-grain-opacity: 0.07;
    --sumi-border-default: rgba(0,152,181, 0.05);
  }
  [data-patina="4"] {
    --sumi-grain-opacity: 0.08;
    --sumi-border-default: rgba(0,152,181, 0.08);
    --sumi-shadow-sm: 0 0 8px rgba(0,152,181, 0.08);
  }

  ::selection {
    background: var(--primary);
    color: var(--primary-foreground);
  }

  /* Custom Scrollbar — thin, subtle */
  ::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }

  ::-webkit-scrollbar-track {
    background: var(--sumi-scrollbar-track);
  }

  ::-webkit-scrollbar-thumb {
    background: var(--sumi-scrollbar-thumb);
    border-radius: var(--sumi-radius-full);
    transition: background-color 0.2s ease;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: var(--sumi-scrollbar-hover);
  }

  @supports (scrollbar-width: thin) {
    * {
      scrollbar-width: thin;
      scrollbar-color: var(--sumi-scrollbar-thumb) transparent;
    }
  }

  /* Typography — Space Grotesk Bold UPPERCASE (engraved stone) */
  h1, h2, h3, h4, h5, h6 {
    @apply font-heading text-foreground;
    font-weight: 700;
    text-transform: uppercase;
    text-wrap: balance;
  }

  h1 { font-size: 2rem; letter-spacing: 0.15em; line-height: 1.2; }
  h2 { font-size: 1.5rem; letter-spacing: 0.12em; line-height: 1.3; }
  h3 { font-size: 1.25rem; letter-spacing: 0.10em; line-height: 1.4; }
  h4 { font-size: 1.125rem; letter-spacing: 0.08em; line-height: 1.4; }
  h5 { font-size: 1rem; letter-spacing: 0.08em; line-height: 1.4; }
  h6 { font-size: 0.875rem; letter-spacing: 0.08em; line-height: 1.5; }

  p {
    @apply text-muted-foreground leading-relaxed;
    text-wrap: pretty;
  }

  a:not([class]) {
    @apply text-primary transition-colors;
  }
  a:not([class]):hover {
    @apply text-primary/80;
  }

  code {
    @apply font-mono text-sm bg-muted px-1.5 py-0.5 rounded;
  }

  pre {
    @apply font-mono text-sm bg-muted p-4 rounded-lg overflow-x-auto;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUMI UTILITY CLASSES
   ═══════════════════════════════════════════════════════════════════════════ */
@layer utilities {

  /* Layout primitives — standard widths/heights for app shell and pages */
  .max-w-layout-content { max-width: var(--layout-content-max-width); }
  .min-h-layout-main { min-height: var(--layout-main-min-height); }
  .min-h-layout-page { min-height: var(--layout-page-min-height); }
  .min-h-layout-page-sm { min-height: var(--layout-page-min-height-sm); }
  .min-h-layout-story { min-height: var(--layout-story-decorator-min-height); }
  .max-h-layout-drawer { max-height: var(--layout-drawer-max-height); }
  .max-h-layout-panel { max-height: var(--layout-panel-max-height); }
  .max-h-layout-list { max-height: var(--layout-list-max-height); }
  .max-h-layout-modal { max-height: var(--layout-modal-max-height); }
  .max-h-layout-modal-sm { max-height: var(--layout-modal-max-height-sm); }
  .max-h-layout-modal-xs { max-height: var(--layout-modal-max-height-xs); }
  .max-h-layout-modal-lg { max-height: var(--layout-modal-max-height-lg); }
  .h-layout-modal-sm { height: var(--layout-modal-max-height-sm); }
  .h-layout-lyrics { height: var(--layout-lyrics-height); }
  .h-layout-lyrics-sm { height: var(--layout-lyrics-height-sm); }
  .h-layout-chat { height: var(--layout-chat-height); }
  .h-layout-chat-main { height: var(--layout-chat-main-height); }
  .h-layout-stream { height: var(--layout-stream-height); }
  .h-layout-modal-full { height: var(--layout-modal-full-height); }

  /* Sidebar layout utilities */
  .w-sidebar-expanded { width: var(--sidebar-width-expanded); }
  .w-sidebar-collapsed { width: var(--sidebar-width-collapsed); }
  .left-sidebar { left: var(--sidebar-offset-left); }
  .top-sidebar { top: var(--sidebar-offset-top); }
  .bottom-sidebar { bottom: var(--sidebar-offset-bottom); }
  .z-sidebar { z-index: var(--sidebar-z-index); }
  .z-sidebar-overlay { z-index: var(--sidebar-overlay-z-index); }
  .z-player { z-index: var(--player-z-index); }
  .h-mobile-nav { height: var(--mobile-bottom-nav-height); }

  /* App shell — header / main offsets */
  .h-header { height: var(--header-height); }
  .pt-main { padding-top: var(--main-offset-top); }
  .pb-main { padding-bottom: var(--main-offset-bottom); }
  .ml-main-expanded { margin-left: var(--main-margin-left-expanded); }
  .ml-main-collapsed { margin-left: var(--main-margin-left-collapsed); }

  /* Responsive margin-left for main */
  @media (min-width: 1024px) {
    .lg\:ml-main-expanded { margin-left: var(--main-margin-left-expanded); }
    .lg\:ml-main-collapsed { margin-left: var(--main-margin-left-collapsed); }
    .lg\:left-main-expanded { left: var(--main-margin-left-expanded); }
    .lg\:left-main-collapsed { left: var(--main-margin-left-collapsed); }
    .lg\:w-player-bar-expanded { width: calc(100vw - var(--main-margin-left-expanded) - 1rem); }
    .lg\:w-player-bar-collapsed { width: calc(100vw - var(--main-margin-left-collapsed) - 1rem); }
  }

  /* Player bar width: mobile (no sidebar) */
  .w-player-bar { width: calc(100vw - 2rem); }

  .left-header-expanded { left: var(--header-left-expanded); }
  .left-header-collapsed { left: var(--header-left-collapsed); }

  /* Shell transition — sidebar width/opacity */
  .transition-shell {
    transition: width var(--sumi-duration-normal) var(--sumi-ease-out),
      opacity var(--sumi-duration-normal) var(--sumi-ease-out),
      transform var(--sumi-duration-normal) var(--sumi-ease-out);
  }

  /* Respect prefers-reduced-motion */
  @media (prefers-reduced-motion: reduce) {
    .transition-shell {
      transition: none;
    }
    .player-bar-entrance {
      animation: none !important;
    }
  }

  /* Sidebar active nav item — left border indicator */
  .sidebar-active-indicator {
    box-shadow: var(--sidebar-active-indicator);
  }

  /* ═══ Ink Edge utilities — diffused shadows instead of borders ═══ */
  .ink-edge {
    border: none;
    box-shadow: 0 0 8px rgba(26,26,30, 0.05);
  }
  .ink-edge-faint {
    border: none;
    box-shadow: 0 0 4px rgba(26,26,30, 0.03);
  }
  .ink-edge-strong {
    border: none;
    box-shadow: 0 0 12px rgba(26,26,30, 0.08);
  }
  .ink-edge-bottom {
    border: none;
    box-shadow: 0 4px 8px -4px rgba(26,26,30, 0.08);
  }
  .ink-edge-right {
    border: none;
    box-shadow: 4px 0 8px -4px rgba(26,26,30, 0.06);
  }

  /* Glass Effect — Shoji screen (障子) */
  .glass, .sumi-glass {
    background: var(--sumi-glass-bg);
    backdrop-filter: blur(var(--sumi-glass-blur)) saturate(0.85);
    -webkit-backdrop-filter: blur(var(--sumi-glass-blur)) saturate(0.85);
    box-shadow: 0 0 8px rgba(26,26,30, 0.05);
  }

  /* Typography utilities — SUMI hierarchy */
  .font-heading { font-family: var(--sumi-font-heading); }
  .font-serif { font-family: var(--sumi-font-serif); }

  .text-display { font-size: 2.25rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; line-height: 1.2; }
  .text-heading-1 { font-size: 1.875rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; line-height: 1.3; }
  .text-heading-2 { font-size: 1.5rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.10em; line-height: 1.4; }
  .text-heading-3 { font-size: 1.25rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; line-height: 1.4; }
  .text-heading-4 { font-size: 1.125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; line-height: 1.4; }
  .text-body-lg { @apply text-base leading-relaxed; }
  .text-body { @apply text-sm leading-relaxed; }
  .text-caption { @apply text-xs text-muted-foreground; }
  .text-label { @apply text-xs font-medium uppercase tracking-wider text-muted-foreground; }

  /* SUMI typography classes (from design system) */
  .sumi-display { font-family: var(--sumi-font-heading); font-size: 2.25rem; font-weight: 700; line-height: 1.2; letter-spacing: 0.15em; text-transform: uppercase; }
  .sumi-h1 { font-family: var(--sumi-font-heading); font-size: 1.875rem; font-weight: 700; line-height: 1.3; letter-spacing: 0.12em; text-transform: uppercase; }
  .sumi-h2 { font-family: var(--sumi-font-heading); font-size: 1.5rem; font-weight: 700; line-height: 1.4; letter-spacing: 0.10em; text-transform: uppercase; }
  .sumi-h3 { font-family: var(--sumi-font-heading); font-size: 1.25rem; font-weight: 700; line-height: 1.4; letter-spacing: 0.08em; text-transform: uppercase; }
  .sumi-h4 { font-family: var(--sumi-font-heading); font-size: 1.125rem; font-weight: 700; line-height: 1.4; letter-spacing: 0.08em; text-transform: uppercase; }
  .sumi-body-lg { font-size: var(--sumi-text-md); font-weight: var(--sumi-weight-regular); line-height: var(--sumi-leading-relaxed); }
  .sumi-body { font-size: var(--sumi-text-base); font-weight: var(--sumi-weight-regular); line-height: var(--sumi-leading-normal); }
  .sumi-body-sm { font-size: var(--sumi-text-sm); font-weight: var(--sumi-weight-regular); line-height: var(--sumi-leading-normal); }
  .sumi-caption { font-size: var(--sumi-text-xs); font-weight: var(--sumi-weight-regular); line-height: var(--sumi-leading-normal); }
  .sumi-label { font-size: var(--sumi-text-xs); font-weight: var(--sumi-weight-medium); line-height: var(--sumi-leading-normal); letter-spacing: var(--sumi-tracking-wider); text-transform: uppercase; }
  .sumi-mono { font-family: var(--sumi-font-mono); font-size: var(--sumi-text-sm); }

  /* Animation Utilities */
  .animate-fade-in { animation: sumi-fade-in var(--sumi-duration-normal) var(--sumi-ease-out); }
  .animate-slide-up { animation: sumi-slide-up var(--sumi-duration-normal) var(--sumi-ease-out); }
  .animate-scale-in { animation: sumi-scale-in var(--sumi-duration-normal) var(--sumi-ease-out); }
  .animate-fadeIn { animation: sumi-fade-in var(--sumi-duration-normal) var(--sumi-ease-out); }
  .animate-scaleIn { animation: sumi-scale-in var(--sumi-duration-normal) var(--sumi-ease-out); }
  .animate-pop { animation: sumi-pop var(--sumi-duration-slower) var(--sumi-ease-bounce); }
  .animate-like-bounce { animation: like-bounce var(--sumi-duration-slow) var(--sumi-ease-out); }
  .animate-shake { animation: shake 0.4s ease-in-out; }
  .animate-spin-slow { animation: spin-slow 10s linear infinite; }
  .animate-achievement { animation: achievement-slide 0.5s var(--sumi-ease-spring); }
  .animate-eq { animation: eq-bar 0.5s ease-in-out infinite; }
  .animate-marquee { animation: marquee 10s linear infinite; }
  .animate-auth-enter { animation: auth-enter var(--sumi-duration-slow) var(--sumi-ease-out) both; }
  .animate-empty-state-in { animation: sumi-scale-in var(--sumi-duration-normal) var(--sumi-ease-out) both; }
  .animate-stagger-in { animation: sumi-slide-up var(--sumi-duration-normal) var(--sumi-ease-out) both; }
  .animate-glow-pulse { animation: sumi-pulse 2s ease-in-out infinite; }
  .animate-content-reveal { animation: content-reveal var(--sumi-duration-slow) var(--sumi-ease-out) both; }
  .animate-glow-breathe { animation: glow-breathe 3s ease-in-out infinite; }
  .animate-vinyl-spin { animation: vinyl-spin 3s linear infinite; }
  .animate-vinyl-spin.paused { animation-play-state: paused; }
  .animate-slide-in-right { animation: slide-in-right var(--sumi-duration-normal) var(--sumi-ease-spring); }
  .animate-subtle-float { animation: subtle-float 6s ease-in-out infinite; }
  .animate-card-enter { animation: card-enter var(--sumi-duration-slow) var(--sumi-ease-out) both; }

  /* Now-playing EQ bars container */
  .eq-bars {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 14px;
    width: 14px;
  }
  .eq-bars > span {
    display: block;
    width: 3px;
    border-radius: 1px;
    background: currentColor;
  }
  .eq-bars > span:nth-child(1) { animation: eq-bar-1 0.8s ease-in-out infinite; }
  .eq-bars > span:nth-child(2) { animation: eq-bar-2 0.7s ease-in-out infinite; }
  .eq-bars > span:nth-child(3) { animation: eq-bar-3 0.9s ease-in-out infinite; }
  .eq-bars.paused > span { animation-play-state: paused; height: 30%; }

  /* Gradient text animation */
  .animate-gradient-text {
    background-size: 200% auto;
    animation: gradient-shift 3s ease-in-out infinite;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  /* Section divider — brush stroke (筆致) */
  .section-divider {
    height: 2px;
    background: linear-gradient(90deg,
      transparent 0%,
      var(--sumi-border-faint) 8%,
      var(--sumi-border-strong) 25%,
      var(--sumi-border-strong) 75%,
      var(--sumi-border-faint) 92%,
      transparent 100%
    );
    opacity: 0.8;
  }

  /* Gold leaf line — 金箔 accent divider */
  .gold-line {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(184,134,11,0.4) 30%, rgba(184,134,11,0.15) 70%, transparent 100%);
  }

  /* Player bar entrance */
  .player-bar-entrance {
    animation: player-bar-entrance var(--sumi-duration-slower) var(--sumi-ease-spring) both;
  }

    /* Progress bar — ink flow */
  .progress-bar-animated {
    background: linear-gradient(90deg, var(--sumi-accent) 0%, var(--sumi-accent-hover) 50%, var(--sumi-accent) 100%);
    background-size: 200% 100%;
    animation: progress-shimmer 2s ease-in-out infinite;
  }

  /* Sumi-e animation utilities */
  .animate-ink-drop { animation: sumi-ink-drop var(--sumi-duration-slow) var(--sumi-ease-spring); }
  .animate-ink-spread { animation: sumi-ink-spread var(--sumi-duration-slower) var(--sumi-ease-out); }
  .animate-brush-stroke { animation: sumi-brush-stroke var(--sumi-duration-slow) var(--sumi-ease-out); }
  .animate-ink-reveal { animation: sumi-ink-reveal var(--sumi-duration-slower) var(--sumi-ease-out) both; }

  /* Discord-style hover card lift */
  .hover-lift {
    transition: transform var(--sumi-duration-normal) var(--sumi-ease-out),
                box-shadow var(--sumi-duration-normal) var(--sumi-ease-out);
  }
  .hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--sumi-shadow-lg);
  }
  .hover-lift:active {
    transform: translateY(0);
    box-shadow: var(--sumi-shadow-sm);
  }

  /* Scrollbar hide utility */
  .scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  .scrollbar-hide::-webkit-scrollbar {
    display: none;
  }

  /* Line clamp utilities */
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* Ink Wash Texture — sumi-nagashi (墨流し) */
  .sumi-wash-texture { position: relative; }
  .sumi-wash-texture::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 15% 60%, var(--sumi-accent-subtle) 0%, transparent 55%),
      radial-gradient(ellipse at 85% 25%, rgba(255,255,255,0.015) 0%, transparent 45%),
      radial-gradient(ellipse at 50% 90%, rgba(0,152,181,0.03) 0%, transparent 50%);
    pointer-events: none;
  }

  /* Ink bleed hover — bokashi (暈し) */
  .sumi-ink-bleed { position: relative; overflow: hidden; }
  .sumi-ink-bleed::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
      rgba(0,152,181, 0.06) 0%,
      transparent 55%);
    opacity: 0;
    transition: opacity var(--sumi-duration-normal) var(--sumi-ease-default);
    pointer-events: none;
  }
  .sumi-ink-bleed:hover::after { opacity: 1; }

  /* Hanko stamp — subtle seal impression (判子) */
  .sumi-hanko {
    transform: rotate(-1.5deg);
    box-shadow:
      1px 1px 0 rgba(0,152,181, 0.2),
      -0.5px -0.5px 0 rgba(0,0,0, 0.08);
  }

  /* Notan — dramatic light/dark contrast container (濃淡) */
  .sumi-notan {
    background: linear-gradient(
      180deg,
      var(--sumi-bg-void) 0%,
      var(--sumi-bg-base) 30%,
      var(--sumi-bg-raised) 100%
    );
  }

  /* Bokashi gradient wash — for hero backgrounds (暈し) */
  .sumi-bokashi {
    background: linear-gradient(
      135deg,
      var(--sumi-bg-void) 0%,
      var(--sumi-bg-base) 40%,
      var(--sumi-bg-wash) 60%,
      var(--sumi-bg-void) 100%
    );
  }

  /* Sumi-nagashi marble background — floating ink (墨流し) */
  .sumi-nagashi {
    background:
      radial-gradient(ellipse at 20% 50%, var(--sumi-bg-wash) 0%, transparent 50%),
      radial-gradient(ellipse at 80% 50%, var(--sumi-bg-raised) 0%, transparent 40%),
      radial-gradient(ellipse at 50% 80%, rgba(0,152,181,0.02) 0%, transparent 45%),
      var(--sumi-bg-void);
    background-size: 200% 200%;
  }
  .sumi-nagashi.animate { animation: sumi-nagashi 25s ease-in-out infinite; }

  /* Ink card — atmospheric container with wash background */
  .ink-card {
    position: relative;
    border-radius: var(--sumi-radius-sm);
    overflow: hidden;
  }
  .ink-card::before {
    content: '';
    position: absolute;
    inset: -20px;
    background:
      radial-gradient(ellipse at 25% 25%, rgba(232,224,208, 0.035) 0%, transparent 55%),
      radial-gradient(ellipse at 75% 75%, rgba(232,224,208, 0.025) 0%, transparent 50%);
    filter: blur(8px);
    pointer-events: none;
  }
  .ink-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 5%; right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--sumi-border-default) 20%, var(--sumi-border-faint) 60%, transparent 100%);
    pointer-events: none;
  }
  .ink-card > * { position: relative; z-index: 1; }

  /* Ghost kanji — large decorative character */
  .ghost-kanji {
    position: absolute;
    font-family: var(--sumi-font-heading);
    font-weight: 200;
    opacity: 0.06;
    pointer-events: none;
    user-select: none;
    line-height: 1;
    z-index: 0;
    color: currentColor;
  }
  [data-theme="light"] .ghost-kanji { opacity: 0.08; }

  /* Brush underline — vermillion stroke accent */
  .brush-underline::after {
    content: '';
    display: block;
    margin-top: 8px;
    height: 2px;
    width: min(120px, 40%);
    background: linear-gradient(90deg, var(--sumi-accent) 0%, transparent 100%);
    border-radius: 1px;
  }

  /* Hanko seal — logo mark */
  .hanko-seal {
    position: relative;
    transform: rotate(-2deg);
    box-shadow:
      0 0 0 1px rgba(0,152,181, 0.25),
      0 2px 8px rgba(0,152,181, 0.12);
    overflow: hidden;
  }
  .hanko-seal::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.15'/%3E%3C/svg%3E");
    mix-blend-mode: overlay;
    pointer-events: none;
  }

  /* Brush stroke divider — tapered ink line */
  .brush-divider {
    height: 2px;
    background: linear-gradient(90deg,
      var(--sumi-border-strong) 0%,
      var(--sumi-border-default) 40%,
      var(--sumi-border-faint) 70%,
      transparent 100%);
    border-radius: 1px;
  }

  /* Vertical brush stroke border — for sidebar/panel edges */
  .sumi-stroke-border-left {
    border-left: 2px solid var(--sumi-border-strong);
    border-image: linear-gradient(
      to bottom,
      transparent 0%,
      var(--sumi-border-default) 10%,
      var(--sumi-border-strong) 30%,
      var(--sumi-border-strong) 70%,
      var(--sumi-border-default) 90%,
      transparent 100%
    ) 1;
  }

  /* Noise texture utility — washi fiber (和紙) */
  .noise { position: relative; }
  .noise::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.35 0.85' numOctaves='5' stitchTiles='stitch' seed='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.5;
    mix-blend-mode: overlay;
    border-radius: inherit;
  }

  @media (prefers-reduced-motion: reduce) {
    .animate-stagger-in { animation: none; }
    .animate-glow-pulse { animation: none; }
    .animate-content-reveal { animation: none; }
    .animate-glow-breathe { animation: none; }
    .animate-vinyl-spin { animation: none; }
    .animate-slide-in-right { animation: none; }
    .animate-subtle-float { animation: none; }
    .progress-bar-animated { animation: none; }
    .hover-lift { transition: none; }
    .hover-lift:hover { transform: none; }
    .animate-ink-drop { animation: none; }
    .animate-ink-spread { animation: none; }
    .animate-brush-stroke { animation: none; }
    .animate-ink-reveal { animation: none; }
    .sumi-nagashi.animate { animation: none; }
    .sumi-ink-bleed::after { display: none; }
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SKELETON SHIMMER — loading effect
   ═══════════════════════════════════════════════════════════════════════════ */
.skeleton-shimmer {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.06) 40%,
    rgba(255, 255, 255, 0.1) 50%,
    rgba(255, 255, 255, 0.06) 60%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .skeleton-shimmer {
    animation: none;
    background: none;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   KEYFRAME ANIMATIONS — SUMI
   ═══════════════════════════════════════════════════════════════════════════ */

/* Core SUMI animations */
@keyframes sumi-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* S5.1: Branded loading progress bar */
@keyframes loading-progress {
  0%   { width: 0; transform: translateX(0); }
  50%  { width: 70%; transform: translateX(0); }
  100% { width: 100%; transform: translateX(100%); }
}

@keyframes sumi-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes sumi-slide-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes sumi-slide-down {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes sumi-scale-in {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes sumi-scale-out {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.95); }
}

/* Pop animation for modals/toasts */
@keyframes sumi-pop {
  0%   { opacity: 0; transform: scale(0.8); }
  60%  { opacity: 1; transform: scale(1.05); }
  100% { transform: scale(1); }
}

/* Live/status pulse */
@keyframes sumi-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

/* Ink brush stroke reveal — page transitions */
@keyframes sumi-brush-reveal {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

/* Skeleton loading */
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* EQ bars — "now playing" indicator */
@keyframes eq-bar {
  0%, 100% { transform: scaleY(0.3); }
  50%      { transform: scaleY(1); }
}

/* Legacy-compatible animations (used in existing codebase) */
@keyframes like-bounce {
  0%   { transform: scale(1); }
  25%  { transform: scale(1.3); }
  50%  { transform: scale(0.9); }
  75%  { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

@keyframes spin-slow {
  to { transform: rotate(360deg); }
}

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

@keyframes marquee {
  0%, 20% { transform: translateX(0); }
  80%, 100% { transform: translateX(-100%); }
}

@keyframes achievement-slide {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

@keyframes terminal-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@keyframes auth-enter {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Player bar entrance — Spotify-style float up */
@keyframes player-bar-entrance {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Ink content reveal — emerges from darkness */
@keyframes content-reveal {
  from { opacity: 0; transform: translateY(16px) scale(0.99); filter: blur(6px); }
  to   { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

/* Sumi ink glow — subtle vermillion breathe */
@keyframes glow-breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,152,181, 0); }
  50% { box-shadow: 0 0 20px 2px rgba(0,152,181, 0.10); }
}

/* Vinyl spin for now-playing */
@keyframes vinyl-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Progress bar shimmer (Spotify-style) */
@keyframes progress-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Notification slide in from right */
@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Subtle float for cards */
@keyframes subtle-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

@keyframes bar-fill {
  from { width: 0; }
}

@keyframes level-up {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.2); filter: brightness(1.5); }
  100% { transform: scale(1); }
}

/* Now-playing EQ bars — 3-bar audio visualizer */
@keyframes eq-bar-1 {
  0%, 100% { height: 30%; }
  25%      { height: 80%; }
  50%      { height: 50%; }
  75%      { height: 100%; }
}
@keyframes eq-bar-2 {
  0%, 100% { height: 50%; }
  20%      { height: 100%; }
  45%      { height: 30%; }
  70%      { height: 80%; }
}
@keyframes eq-bar-3 {
  0%, 100% { height: 60%; }
  30%      { height: 40%; }
  55%      { height: 100%; }
  80%      { height: 45%; }
}

/* Gradient text shimmer (for headings) */
@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Gentle card entrance — stagger-friendly */
@keyframes card-enter {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Ripple expand for empty states */
@keyframes ripple-expand {
  0%   { transform: scale(0.8); opacity: 0.4; }
  50%  { transform: scale(1.15); opacity: 0.15; }
  100% { transform: scale(0.8); opacity: 0.4; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUMI-E ANIMATIONS — 墨絵 Ink Wash Effects
   ═══════════════════════════════════════════════════════════════════════════ */

/* Ink drop — element appears like ink hitting wet paper */
@keyframes sumi-ink-drop {
  0%   { transform: scale(0); opacity: 0; border-radius: 50%; }
  35%  { transform: scale(1.08); opacity: 0.85; border-radius: 48% 52% 50% 50%; }
  55%  { transform: scale(0.96); opacity: 1; }
  75%  { transform: scale(1.02); }
  100% { transform: scale(1); opacity: 1; border-radius: inherit; }
}

/* Ink spread — circular reveal like ink spreading on washi */
@keyframes sumi-ink-spread {
  0%   { clip-path: circle(0% at 50% 50%); filter: blur(6px); opacity: 0; }
  40%  { filter: blur(2px); opacity: 0.8; }
  100% { clip-path: circle(100% at 50% 50%); filter: blur(0); opacity: 1; }
}

/* Brush stroke reveal — horizontal wipe like a calligraphy stroke */
@keyframes sumi-brush-stroke {
  0%   { clip-path: inset(0 100% 0 0); opacity: 0.4; }
  60%  { clip-path: inset(0 8% 0 0); opacity: 0.9; }
  100% { clip-path: inset(0 0 0 0); opacity: 1; }
}

/* Ink reveal — content emerges from darkness like ink on wet paper */
@keyframes sumi-ink-reveal {
  0%   { opacity: 0; transform: translateY(12px); filter: blur(8px) brightness(0.7); }
  40%  { filter: blur(3px) brightness(0.9); }
  100% { opacity: 1; transform: translateY(0); filter: blur(0) brightness(1); }
}

/* Sumi-nagashi — floating ink marble drift */
@keyframes sumi-nagashi {
  0%   { background-position: 0% 50%; }
  25%  { background-position: 100% 25%; }
  50%  { background-position: 100% 75%; }
  75%  { background-position: 0% 60%; }
  100% { background-position: 0% 50%; }
}

/* Ink pulse — like a droplet ripple in an ink stone (硯) */
@keyframes sumi-ink-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0,152,181, 0.25); }
  50%  { box-shadow: 0 0 0 8px rgba(0,152,181, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0,152,181, 0); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════════════════════ */
@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;
  }
  /* Keep opacity transitions for functional feedback */
  .interactive { transition: opacity 100ms ease-out; }
}