/* ============================================
   GameLab — Applesauce Design System
   Sans-serif variant / research lab personality
   Full revision: depth, container queries, scroll-driven,
   mobile haptics, ambient light, view transitions
   ============================================ */

/* ---- DESIGN TOKENS ---- */
:root, [data-theme="dark"] {
  /* Backgrounds */
  --bg: #111117;
  --bg-subtle: #1a1a22;
  --card-bg: rgba(24,24,32,0.75);
  --card-border: rgba(255,255,255,0.06);
  --listing-bg: rgba(18,18,24,0.85);

  /* Shadows */
  --card-shadow: 0 2px 4px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --card-hover-shadow: 0 4px 8px rgba(0,0,0,0.4), 0 8px 32px rgba(0,0,0,0.15);

  /* Depth system (3-level elevation) */
  --depth-1-bg: color-mix(in srgb, var(--bg) 95%, #000);
  --depth-1-border: rgba(255,255,255,0.03);
  --depth-1-inset: inset 0 1px 0 rgba(255,255,255,0.02);
  --depth-1-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
  --depth-2-bg: color-mix(in srgb, var(--bg) 93%, #fff);
  --depth-2-border: rgba(255,255,255,0.06);
  --depth-2-inset: inset 0 1px 0 rgba(255,255,255,0.05);
  --depth-2-shadow: 0 2px 8px rgba(0,0,0,0.25);
  --depth-3-bg: color-mix(in srgb, var(--bg) 88%, #fff);
  --depth-3-border: rgba(255,255,255,0.10);
  --depth-3-inset: inset 0 1px 0 rgba(255,255,255,0.08);
  --depth-3-shadow: 0 4px 16px rgba(0,0,0,0.3);

  /* Text */
  --text: #e4e4ec;
  --text-muted: #8e8e9e;
  --text-dim: #5a5a6a;

  /* Accents */
  --accent-primary: #a78bfa;
  --accent-green: #6EE7A0;
  --accent-red: #f87171;
  --accent-gold: #fbbf24;

  /* Typography — sans-serif headings per site request */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'Space Mono', monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Type Scale (8 stops only) */
  --text-xs: 0.65rem;
  --text-sm: 0.75rem;
  --text-base: 0.85rem;
  --text-md: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;

  /* Spacing Scale (multiples of 4px) */
  --space-1: 2px;
  --space-2: 4px;
  --space-3: 8px;
  --space-4: 12px;
  --space-5: 16px;
  --space-6: 20px;
  --space-7: 24px;
  --space-8: 32px;
  --space-9: 40px;
  --space-10: 48px;
  --space-11: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 50%;

  /* Z-Index */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 50;
  --z-modal: 100;
  --z-noise: 9999;

  /* Transitions */
  --ease-out: cubic-bezier(.4,0,.2,1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-quick: 0.15s ease;
  --transition-base: 0.2s cubic-bezier(.4,0,.2,1);
  --transition-smooth: 0.3s cubic-bezier(.4,0,.2,1);
  --transition-entrance: 0.4s cubic-bezier(.4,0,.2,1);
}

[data-theme="warm"] {
  --bg: #F2F0EB;
  --bg-subtle: #ECEAE4;
  --card-bg: rgba(255,255,255,0.55);
  --card-border: rgba(212,197,170,0.5);
  --listing-bg: rgba(255,255,255,0.4);

  --card-shadow: 0 1px 2px rgba(42,33,24,0.04), 0 4px 16px rgba(42,33,24,0.06);
  --card-hover-shadow: 0 2px 4px rgba(42,33,24,0.06), 0 8px 32px rgba(42,33,24,0.08);

  --depth-1-bg: color-mix(in srgb, var(--bg) 95%, #2A2118);
  --depth-1-border: rgba(42,33,24,0.06);
  --depth-1-inset: inset 0 1px 0 rgba(255,255,255,0.5);
  --depth-1-shadow: inset 0 1px 3px rgba(42,33,24,0.08);
  --depth-2-bg: color-mix(in srgb, var(--bg) 93%, #2A2118);
  --depth-2-border: rgba(42,33,24,0.1);
  --depth-2-inset: inset 0 1px 0 rgba(255,255,255,0.6);
  --depth-2-shadow: 0 2px 8px rgba(42,33,24,0.06);
  --depth-3-bg: color-mix(in srgb, var(--bg) 88%, #2A2118);
  --depth-3-border: rgba(42,33,24,0.14);
  --depth-3-inset: inset 0 1px 0 rgba(255,255,255,0.7);
  --depth-3-shadow: 0 4px 16px rgba(42,33,24,0.08);

  --text: #2A2118;
  --text-muted: #7A6A58;
  --text-dim: #A09080;

  --accent-primary: #C2654E;
  --accent-green: #5E8C65;
  --accent-red: #B83A2E;
  --accent-gold: #D4A23A;
}

/* ---- RESET ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

/* ---- NOISE TEXTURE (one overlay, never per-card) ---- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: var(--z-noise);
  opacity: 0.4;
}

/* ---- HEADINGS ---- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.3;
  font-weight: 700;
}
h1 { font-size: clamp(var(--text-2xl), 5vw + 0.5rem, var(--text-3xl)); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-md); }

/* ---- LAYOUT ---- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-7);
}

/* ---- HEADER (opaque, no backdrop-filter) ---- */
header {
  border-bottom: 1px solid var(--card-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: var(--z-sticky);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.logo-icon {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary) 60%, var(--accent-green)));
}

.logo span {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

nav {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

nav button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  transition: var(--transition-quick);
  -webkit-tap-highlight-color: transparent;
}

nav button:hover {
  color: var(--text);
  background: var(--bg-subtle);
}

nav button.active {
  color: var(--text);
  background: var(--bg-subtle);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
  transition: transform 300ms var(--spring);
}

.nav-toggle:active {
  transform: scale(0.94);
  transition: transform 50ms ease-in;
}

.nav-toggle svg { width: 18px; height: 18px; }

/* Theme toggle in header */
.theme-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-quick);
  font-size: var(--text-sm);
  margin-left: var(--space-3);
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--bg-subtle);
  border-color: var(--accent-primary);
}

/* Theme transition (temporary class — never permanent on body) */
body.theme-transitioning,
body.theme-transitioning * {
  transition: background-color 0.4s var(--ease-out),
              color 0.4s var(--ease-out),
              border-color 0.4s var(--ease-out),
              box-shadow 0.4s var(--ease-out) !important;
}

/* ---- HERO ---- */
.hero {
  text-align: center;
  padding: var(--space-11) 0 var(--space-10);
  position: relative;
}

/* Ambient light glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, color-mix(in srgb, var(--accent-primary) 8%, transparent) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero h1 {
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}

.hero-sub {
  font-size: var(--text-md);
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.hero .stats {
  display: flex;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.stat { text-align: center; }

.stat .number {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--accent-primary);
}

.stat .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: var(--space-1);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

/* ---- SECTIONS ---- */
.section { display: none; padding: var(--space-9) 0 var(--space-11); }
.section.active { display: block; }

.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.section-desc {
  color: var(--text-muted);
  font-size: var(--text-base);
  margin-bottom: var(--space-7);
  max-width: 580px;
}

/* ---- BUTTONS (3D push + mobile haptic) ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
  transition: transform 300ms var(--spring), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.btn-primary {
  padding: var(--space-4) var(--space-7);
  font-size: var(--text-md);
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary) 80%, #000));
  box-shadow:
    var(--depth-3-inset),
    0 2px 0 color-mix(in srgb, var(--accent-primary) 50%, #000),
    0 4px 12px rgba(0,0,0,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    var(--depth-3-inset),
    0 4px 0 color-mix(in srgb, var(--accent-primary) 50%, #000),
    0 8px 20px rgba(0,0,0,0.4),
    0 0 20px color-mix(in srgb, var(--accent-primary) 15%, transparent);
}

/* Asymmetric timing: fast press, spring release */
.btn-primary:active {
  transform: translateY(1px) scale(0.97);
  transition: transform 50ms ease-in;
  box-shadow:
    0 1px 0 color-mix(in srgb, var(--accent-primary) 50%, #000),
    0 2px 4px rgba(0,0,0,0.2);
}

.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--accent-primary);
  background: var(--bg-subtle);
}

.btn-secondary:active {
  transform: scale(0.97);
  transition: transform 50ms ease-in;
}

.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-sm); }
.btn-danger { color: var(--accent-red); border-color: var(--accent-red); }
.btn-danger:hover { background: color-mix(in srgb, var(--accent-red) 10%, transparent); }

/* Touch-specific: faster press feedback */
@media (hover: none) and (pointer: coarse) {
  .btn-primary:active { transition: transform 34ms ease-in; }
  .btn-secondary:active { transition: transform 34ms ease-in; }
}

/* ---- CARDS (depth-2, perf-safe) ---- */
.card {
  background: var(--depth-2-bg);
  border: 1px solid var(--depth-2-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--depth-2-inset), var(--depth-2-shadow);
  transition: var(--transition-smooth);
  contain: layout style paint;
}

.card:hover {
  box-shadow: var(--depth-3-inset), var(--depth-3-shadow);
  transform: translateY(-2px);
}

.panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  contain: layout style paint;
}

.panel h3 {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-5);
}

/* ---- GAME GRID (container queries) ---- */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-5);
}

.game-card-wrap {
  container-type: inline-size;
  container-name: game-card;
}

.game-card {
  background: var(--depth-2-bg);
  border: 1px solid var(--depth-2-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  cursor: pointer;
  transition: transform 300ms var(--spring), box-shadow var(--transition-smooth);
  contain: layout style paint;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 3px solid var(--accent-primary);
  box-shadow: var(--depth-2-inset), var(--depth-2-shadow);
  -webkit-tap-highlight-color: transparent;
  height: 100%;
}

.game-card:hover {
  box-shadow: var(--depth-3-inset), var(--depth-3-shadow);
  transform: translateY(-2px);
}

.game-card:active {
  transform: scale(0.98);
  transition: transform 50ms ease-in;
}

.game-card:nth-child(2) { border-left-color: var(--accent-green); }
.game-card:nth-child(3) { border-left-color: var(--accent-gold); }
.game-card:nth-child(4) { border-left-color: var(--accent-red); }
.game-card:nth-child(5) { border-left-color: color-mix(in srgb, var(--accent-primary) 60%, var(--accent-green)); }
.game-card:nth-child(6) { border-left-color: color-mix(in srgb, var(--accent-gold) 60%, var(--accent-red)); }

.game-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.game-card:nth-child(2) .game-card-icon { background: color-mix(in srgb, var(--accent-green) 15%, transparent); color: var(--accent-green); }
.game-card:nth-child(3) .game-card-icon { background: color-mix(in srgb, var(--accent-gold) 15%, transparent); color: var(--accent-gold); }
.game-card:nth-child(4) .game-card-icon { background: color-mix(in srgb, var(--accent-red) 15%, transparent); color: var(--accent-red); }
.game-card:nth-child(5) .game-card-icon { background: color-mix(in srgb, var(--accent-primary) 10%, transparent); color: var(--accent-primary); }
.game-card:nth-child(6) .game-card-icon { background: color-mix(in srgb, var(--accent-gold) 10%, transparent); color: var(--accent-gold); }

.game-card h3 { font-size: var(--text-md); font-weight: 700; margin-bottom: var(--space-3); }
.game-card p { color: var(--text-muted); font-size: var(--text-sm); margin-bottom: var(--space-5); line-height: 1.6; }

.benchmark {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  padding-top: var(--space-4);
  border-top: 1px solid var(--card-border);
}

.bench-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--accent-green);
  box-shadow: 0 0 6px color-mix(in srgb, var(--accent-green) 40%, transparent);
  flex-shrink: 0;
}

/* ---- PLAY AREA ---- */
.play-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-7);
}

.play-header h2 {
  font-size: var(--text-xl);
  font-weight: 800;
}

.back-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  transition: var(--transition-quick);
  -webkit-tap-highlight-color: transparent;
}

.back-btn:hover { border-color: var(--accent-primary); color: var(--text); }
.back-btn:active { transform: scale(0.97); transition: transform 50ms ease-in; }

.play-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

/* ---- FORMS (depth-1 inputs) ---- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  color: var(--text);
  font-size: var(--text-base);
  font-family: var(--font-body);
  transition: var(--transition-quick);
  width: 100%;
  box-shadow: var(--depth-1-shadow);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: var(--depth-1-shadow), 0 0 0 2px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%238e8e9e' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
}

/* ---- SCENARIO BOX ---- */
.scenario-box {
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
  font-size: var(--text-base);
  line-height: 1.8;
  white-space: pre-line;
  color: var(--text-muted);
  box-shadow: var(--depth-1-shadow);
}

/* ---- RESULT DISPLAY ---- */
.result-card {
  background: var(--depth-1-bg);
  border-radius: var(--radius);
  padding: var(--space-6);
  margin-top: var(--space-4);
  border-left: 3px solid var(--accent-primary);
  animation: fadeInUp 0.3s var(--ease-out);
}

.result-card.error { border-left-color: var(--accent-red); }

.result-card .choice { font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-3); }
.result-card .reasoning {
  color: var(--text-muted);
  font-size: var(--text-base);
  font-style: italic;
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.result-card .payoffs { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.result-card .payoff-item {
  background: var(--card-bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
}

.result-card .payoff-item .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.result-card .payoff-item .value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-green);
  text-shadow: 0 0 10px color-mix(in srgb, var(--accent-green) 30%, transparent);
}
.result-card .payoff-item .value.dim { color: var(--text-muted); text-shadow: none; }

/* ---- BADGES ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 2px var(--space-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge-cooperate {
  background: color-mix(in srgb, var(--accent-green) 15%, transparent);
  color: var(--accent-green);
}
.badge-defect {
  background: color-mix(in srgb, var(--accent-red) 15%, transparent);
  color: var(--accent-red);
}
.badge-neutral {
  background: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  color: var(--accent-primary);
}
.badge-dim {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
}

/* ---- PROFILES ---- */
.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-5);
}

.profile-card {
  background: var(--depth-2-bg);
  border: 1px solid var(--depth-2-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  cursor: pointer;
  transition: transform 300ms var(--spring), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  contain: layout style paint;
  box-shadow: var(--depth-2-inset), var(--depth-2-shadow);
  -webkit-tap-highlight-color: transparent;
}

.profile-card:hover {
  box-shadow: var(--depth-3-inset), var(--depth-3-shadow);
  transform: translateY(-2px);
}

.profile-card:active {
  transform: scale(0.98);
  transition: transform 50ms ease-in;
}

.profile-card.selected {
  border-width: 2px;
  box-shadow: var(--depth-3-inset), var(--depth-3-shadow);
}

.profile-header {
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--card-border);
}

.profile-model {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.profile-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.profile-stats {
  display: flex;
  gap: var(--space-5);
  margin-bottom: var(--space-4);
}

.profile-stat { text-align: center; flex: 1; }
.profile-stat-val { font-family: var(--font-mono); font-size: var(--text-lg); font-weight: 700; }
.profile-stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.profile-summary {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-style: italic;
}

.profile-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-5);
}

.detail-panel h3 { font-size: var(--text-md); margin-bottom: var(--space-4); }

.detail-table { display: flex; flex-direction: column; gap: var(--space-2); }

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px dotted var(--card-border);
  font-size: var(--text-sm);
}

.detail-label {
  color: var(--text-muted);
  text-transform: capitalize;
  flex: 1;
}

.detail-val {
  font-family: var(--font-mono);
  font-weight: 600;
  margin-left: var(--space-5);
  min-width: 48px;
  text-align: right;
}

/* ---- DASHBOARD ---- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-7);
}

.dash-card {
  background: var(--depth-2-bg);
  border: 1px solid var(--depth-2-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  contain: layout style paint;
  box-shadow: var(--depth-2-inset), var(--depth-2-shadow);
}

.dash-card h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.dash-card .big-number {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
}

.chart-container {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  margin-bottom: var(--space-7);
  contain: layout style paint;
}

.chart-container h3 {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.chart-container canvas { width: 100% !important; max-height: 400px; }

/* ---- RESULTS TABLE ---- */
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.results-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--card-border);
}

.results-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--card-border);
}

.results-table tr:hover td { background: var(--bg-subtle); }

.nowrap { white-space: nowrap; }
.truncate { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mono { font-family: var(--font-mono); font-size: var(--text-xs); }

/* ---- RESEARCH FINDINGS (bento layout) ---- */
.findings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto auto;
  gap: var(--space-5);
}

/* Hero card spans full width */
.finding-card:first-child {
  grid-column: 1 / -1;
}

.finding-card {
  background: var(--depth-2-bg);
  border: 1px solid var(--depth-2-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  contain: layout style paint;
  box-shadow: var(--depth-2-inset), var(--depth-2-shadow);
}

/* Hero finding has accent gradient border */
.finding-hero-card {
  border-color: color-mix(in srgb, var(--accent-primary) 30%, transparent);
  position: relative;
}

.finding-hero-card::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-green), var(--accent-gold));
}

.finding-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  margin-bottom: var(--space-3);
}

.finding-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  line-height: 1.4;
}

.finding-card p {
  color: var(--text-muted);
  font-size: var(--text-base);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.finding-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.finding-example {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
}

.finding-example.cooperate {
  background: color-mix(in srgb, var(--accent-green) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent-green) 20%, transparent);
}
.finding-example.defect {
  background: color-mix(in srgb, var(--accent-red) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent-red) 20%, transparent);
}

.finding-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}

.finding-example.cooperate .finding-tag { color: var(--accent-green); }
.finding-example.defect .finding-tag { color: var(--accent-red); }

.finding-example code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* Dimensions */
.dimension-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.dimension {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.5;
}

.dimension strong { color: var(--text); }

.dim-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Language markers */
.marker-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.marker {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.marker.cooperate {
  background: color-mix(in srgb, var(--accent-green) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent-green) 20%, transparent);
}
.marker.defect {
  background: color-mix(in srgb, var(--accent-red) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent-red) 20%, transparent);
}

.marker strong { font-size: var(--text-sm); }
.marker.cooperate strong { color: var(--accent-green); }
.marker.defect strong { color: var(--accent-red); }

.marker span { font-size: var(--text-sm); color: var(--text-muted); }
.marker-stat { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-dim); margin-top: var(--space-2); }

/* Effect stats */
.stat-row {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-4);
}

.stat-block { flex: 1; }

.stat-big {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--accent-primary);
  text-shadow: 0 0 20px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* ---- PROMPT BROWSER ---- */
.prompts-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
}

.prompt-browser {
  max-height: 480px;
  overflow-y: auto;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

.prompt-item {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--card-border);
  cursor: pointer;
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  transition: var(--transition-quick);
  white-space: pre-line;
  color: var(--text-dim);
  -webkit-tap-highlight-color: transparent;
}

.prompt-item:hover { background: var(--bg-subtle); color: var(--text); }
.prompt-item.selected {
  background: color-mix(in srgb, var(--accent-primary) 10%, transparent);
  border-left: 3px solid var(--accent-primary);
  color: var(--text);
}
.prompt-item.dim { cursor: default; color: var(--text-dim); }

/* ---- HISTORY ---- */
.history-list { max-height: 400px; overflow-y: auto; }

.history-item {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--card-border);
  font-size: var(--text-sm);
}

.history-item:last-child { border-bottom: none; }
.history-time { color: var(--text-dim); font-family: var(--font-mono); font-size: var(--text-xs); margin-left: var(--space-3); }
.history-reason { margin-top: var(--space-2); color: var(--text-muted); font-size: var(--text-sm); line-height: 1.5; }

/* ---- EMPTY / LOADING ---- */
.empty-state { color: var(--text-muted); font-size: var(--text-base); text-align: center; padding: var(--space-5); }
.loading-state { text-align: center; padding: var(--space-9); }
.loading-state p { color: var(--text-muted); margin-top: var(--space-4); font-size: var(--text-base); }

/* ---- SPINNER (dot pulse) ---- */
.spinner {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  justify-content: center;
}
.spinner-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--accent-primary);
  animation: pulse 1.2s ease-in-out infinite;
}
.spinner-dot:nth-child(2) { animation-delay: 0.2s; }
.spinner-dot:nth-child(3) { animation-delay: 0.4s; }

/* Ring spinner (for inline use) */
.spinner-ring {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--card-border);
  border-top-color: var(--accent-primary);
  border-radius: var(--radius-full);
  animation: spin 0.7s linear infinite;
}

/* ---- SIMULATION PROGRESS ---- */
.sim-progress { margin-top: var(--space-5); }

.progress-bar {
  height: 6px;
  background: var(--depth-1-bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-3);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary) 70%, var(--accent-green)));
  border-radius: var(--radius-sm);
  transition: width 0.4s var(--ease-out);
}

.progress-text { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted); }

/* ---- MODAL (backdrop-filter OK — not scrollable) ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.modal-content {
  max-width: 400px;
  width: 100%;
  animation: modalIn 0.3s var(--ease-out);
}

/* ---- TOAST ---- */
.toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  background: var(--bg-subtle);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  min-width: 240px;
  max-width: 360px;
  font-size: var(--text-sm);
  color: var(--text);
  box-shadow: var(--depth-3-shadow);
  animation: slideInRight 0.3s var(--ease-out) both;
  contain: layout style paint;
}

.toast.toast-error   { border-left: 3px solid var(--accent-red); }
.toast.toast-success { border-left: 3px solid var(--accent-green); }
.toast.toast-info    { border-left: 3px solid var(--accent-primary); }

.toast.removing {
  animation: slideOutRight 0.2s var(--ease-out) forwards;
}

/* ---- API BANNER ---- */
.api-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-3) var(--space-7);
  font-size: var(--text-sm);
  text-align: center;
  z-index: var(--z-sticky);
}

.api-banner.warning {
  background: color-mix(in srgb, var(--accent-gold) 8%, var(--bg));
  border-top: 1px solid color-mix(in srgb, var(--accent-gold) 20%, transparent);
  color: var(--accent-gold);
}

/* ---- FOOTER ---- */
footer {
  background: color-mix(in srgb, var(--bg) 90%, #000);
  border-top: 1px solid var(--card-border);
  padding: var(--space-9) 0 var(--space-7);
  margin-top: var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-7);
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: 800;
  color: var(--text);
  margin-bottom: var(--space-3);
}

.footer-desc {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-quick);
  cursor: pointer;
}

.footer-links a:hover { color: var(--text); }

.footer-bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--card-border);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
}

/* ---- ANIMATIONS ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40%           { opacity: 1;   transform: scale(1.1); }
}

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

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

@keyframes slideOutRight {
  to { opacity: 0; transform: translateX(100%); }
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Stagger children (60ms increments) */
.stagger > * {
  animation: fadeInUp 0.4s var(--ease-out) both;
}
.stagger > :nth-child(1) { animation-delay: 0s; }
.stagger > :nth-child(2) { animation-delay: 0.06s; }
.stagger > :nth-child(3) { animation-delay: 0.12s; }
.stagger > :nth-child(4) { animation-delay: 0.18s; }
.stagger > :nth-child(5) { animation-delay: 0.24s; }
.stagger > :nth-child(6) { animation-delay: 0.30s; }

/* Scroll reveal (base state) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Layer 3: CSS scroll-driven animations (Chrome/Safari/Edge) */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .reveal {
      animation: fadeInUp 0.5s var(--ease-out) both;
      animation-timeline: view();
      animation-range: entry 0% entry 60%;
    }
    .reveal.visible {
      /* scroll-driven takes over, JS class is a no-op */
    }
  }
}

/* ---- REDUCED MOTION ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero::before { display: none; }
}

/* ---- ABOUT PAGE ---- */
.about-block {
  margin-bottom: var(--space-6);
}

.about-block p {
  color: var(--text-muted);
  font-size: var(--text-base);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.about-block p:last-child { margin-bottom: 0; }

.about-block h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.about-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  margin-bottom: var(--space-3);
}

/* Observer / Participant modes */
.about-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin: var(--space-5) 0;
}

.about-mode {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--card-border);
}

.about-mode h4 {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.about-mode p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.about-mode-observer {
  background: color-mix(in srgb, var(--accent-red) 6%, transparent);
  border-color: color-mix(in srgb, var(--accent-red) 15%, transparent);
}

.about-mode-observer h4 { color: var(--accent-red); }

.about-mode-participant {
  background: color-mix(in srgb, var(--accent-green) 6%, transparent);
  border-color: color-mix(in srgb, var(--accent-green) 15%, transparent);
}

.about-mode-participant h4 { color: var(--accent-green); }

.about-mode-markers {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  margin-top: var(--space-3);
  line-height: 1.6;
}

.about-mode-markers span:first-child {
  font-weight: 700;
  color: var(--text-muted);
}

/* Three dimensions */
.about-dimensions {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin: var(--space-5) 0;
}

.about-dim {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.about-dim-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-dim-body h4 {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.about-dim-body p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.about-dim-examples {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.6;
}

.about-dim-examples span:first-child {
  font-weight: 700;
  color: var(--text-muted);
}

/* Game list in about page */
.about-games-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.about-game-item {
  padding: var(--space-5);
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--depth-1-shadow);
}

.about-game-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.about-game-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.about-game-header h4 {
  font-size: var(--text-md);
  font-weight: 700;
}

.about-game-item > p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.about-game-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  padding-top: var(--space-3);
  border-top: 1px solid var(--card-border);
}

/* Domains grid */
.about-domains {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin: var(--space-5) 0;
}

.about-domain {
  padding: var(--space-4);
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius);
}

.about-domain h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: var(--space-2);
}

.about-domain p {
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Tech grid */
.about-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.about-tech-item {
  padding: var(--space-4);
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius);
}

.about-tech-item h4 {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.about-tech-item p {
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Bullet lists */
.about-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.about-list li {
  padding-left: var(--space-6);
  position: relative;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

.about-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--accent-primary);
}

/* Steps */
.about-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.about-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.about-step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary) 60%, var(--accent-green)));
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-step h4 {
  font-size: var(--text-md);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.about-step p {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

/* Citations */
.about-citations p {
  margin-bottom: var(--space-4);
}

.about-citations .about-list li {
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* About page responsive */
@media (max-width: 640px) {
  .about-modes { grid-template-columns: 1fr; }
  .about-domains { grid-template-columns: 1fr; }
  .about-tech-grid { grid-template-columns: 1fr; }
  .about-dim { flex-direction: column; gap: var(--space-3); }
  .about-step { flex-direction: column; gap: var(--space-3); }
  .about-game-meta { flex-direction: column; gap: var(--space-2); }
}

/* ---- GAME DETAIL PAGE ---- */
.game-detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  margin-bottom: var(--space-8);
}

.game-detail-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.game-detail-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--accent-primary);
}

.game-detail-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.game-detail-desc {
  font-size: var(--text-md);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 420px;
}

.game-detail-svg-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--depth-1-bg);
  border: 1px solid var(--depth-1-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  box-shadow: var(--depth-1-shadow);
  min-height: 280px;
}

/* Per-game badge colors */
[data-game-accent="green"] .game-detail-badge { background: color-mix(in srgb, var(--accent-green) 15%, transparent); color: var(--accent-green); }
[data-game-accent="gold"] .game-detail-badge { background: color-mix(in srgb, var(--accent-gold) 15%, transparent); color: var(--accent-gold); }
[data-game-accent="red"] .game-detail-badge { background: color-mix(in srgb, var(--accent-red) 15%, transparent); color: var(--accent-red); }

.game-detail-rules {
  margin-bottom: var(--space-6);
}

.game-detail-rules-body {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.8;
}

.game-detail-rules-body ul {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.game-detail-rules-body li {
  padding-left: var(--space-6);
  position: relative;
}

.game-detail-rules-body li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--accent-primary);
}

/* Benchmark horizontal bars */
.benchmark-bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.benchmark-bar-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.benchmark-bar-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 120px;
  text-align: right;
}

.benchmark-bar-track {
  flex: 1;
  height: 8px;
  background: var(--depth-1-bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.benchmark-bar-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--accent-primary), color-mix(in srgb, var(--accent-primary) 70%, var(--accent-green)));
  transition: width 0.8s var(--ease-out);
  width: 0;
}

.benchmark-bar-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
  min-width: 48px;
}

.benchmark-source {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  margin-top: var(--space-4);
  font-style: italic;
}

.game-detail-cta {
  text-align: center;
  padding: var(--space-8) 0;
}

.btn-lg {
  padding: var(--space-5) var(--space-9);
  font-size: var(--text-lg);
}

/* ---- SVG DIAGRAM THEMING ---- */
.game-svg { width: 100%; max-width: 400px; display: block; }
.game-svg text { fill: var(--text); }
.svg-header { font-family: 'Space Mono', monospace; font-size: 11px; font-weight: 700; fill: var(--text-muted); }
.svg-label { font-family: 'Inter', sans-serif; font-size: 10px; fill: var(--text-dim); }
.svg-payoff { font-family: 'Space Mono', monospace; font-size: 14px; font-weight: 700; fill: var(--text); }
.svg-caption { font-family: 'Inter', sans-serif; font-size: 10px; fill: var(--text-dim); }
.svg-cell { stroke: var(--card-border); stroke-width: 1; }
.svg-cell-green { fill: color-mix(in srgb, var(--accent-green) 12%, transparent); }
.svg-cell-red { fill: color-mix(in srgb, var(--accent-red) 12%, transparent); }
.svg-cell-dim { fill: var(--depth-1-bg); }
.svg-cell-gold { fill: color-mix(in srgb, var(--accent-gold) 10%, transparent); }
.svg-nash { fill: none; stroke: var(--accent-primary); stroke-width: 2; stroke-dasharray: 6 3; }
.svg-node { fill: var(--depth-2-bg); stroke: var(--card-border); stroke-width: 1.5; }
.svg-node-accent { fill: color-mix(in srgb, var(--accent-primary) 15%, var(--depth-2-bg)); stroke: var(--accent-primary); stroke-width: 1.5; }
.svg-node-green { fill: color-mix(in srgb, var(--accent-green) 12%, var(--depth-2-bg)); stroke: var(--accent-green); stroke-width: 1.5; }
.svg-node-red { fill: color-mix(in srgb, var(--accent-red) 12%, var(--depth-2-bg)); stroke: var(--accent-red); stroke-width: 1.5; }
.svg-arrow { stroke: var(--text-dim); stroke-width: 1.5; fill: none; }
.svg-arrow-green { stroke: var(--accent-green); stroke-width: 1.5; fill: none; }
.svg-arrow-red { stroke: var(--accent-red); stroke-width: 1.5; fill: none; }
.svg-multiplier { font-family: 'Space Mono', monospace; font-size: 18px; font-weight: 700; fill: var(--accent-primary); }
.svg-amount { font-family: 'Space Mono', monospace; font-size: 12px; font-weight: 700; fill: var(--accent-green); }
.svg-bar-track { fill: var(--depth-1-bg); }
.svg-bar-fill-green { fill: var(--accent-green); }
.svg-bar-fill-primary { fill: var(--accent-primary); }
.svg-value { font-family: 'Space Mono', monospace; font-size: 14px; font-weight: 700; fill: var(--text); }
.svg-value-light { font-family: 'Space Mono', monospace; font-size: 12px; font-weight: 700; fill: var(--bg); }
.svg-sublabel { font-family: 'Inter', sans-serif; font-size: 9px; fill: var(--text-dim); }
.svg-nash-label { font-family: 'Space Mono', monospace; font-size: 10px; fill: var(--accent-primary); }
.svg-cell-muted { fill: var(--depth-1-bg); stroke: var(--card-border); stroke-width: 1; }
.svg-node-highlight { fill: color-mix(in srgb, var(--accent-gold) 18%, var(--depth-2-bg)); stroke: var(--accent-gold); stroke-width: 2; }
.svg-arrow-return { stroke: var(--accent-green); stroke-width: 1.5; fill: none; stroke-dasharray: 4 3; }

[data-theme="warm"] .svg-value-light { fill: #fff; }

/* ---- TYPEWRITER EFFECT ---- */
.typewriter-cursor {
  display: inline;
  color: var(--accent-primary);
  animation: cursorBlink 0.8s step-end infinite;
  font-weight: 400;
}

.typewriter-cursor-done,
.cursor-fade {
  animation: cursorFadeOut 0.6s var(--ease-out) forwards;
}

.reasoning-typewriter {
  font-style: italic;
  color: var(--text-muted);
  font-size: var(--text-base);
  line-height: 1.6;
  min-height: 1.6em;
  cursor: pointer;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes cursorFadeOut {
  to { opacity: 0; }
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: var(--radius-sm); }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ---- VIEW TRANSITIONS ---- */
@view-transition {
  navigation: auto;
}

::view-transition-old(section-content),
::view-transition-new(section-content) {
  animation-duration: 0.25s;
  animation-timing-function: var(--ease-out);
}

::view-transition-old(section-content) {
  animation-name: fadeInUp;
  animation-direction: reverse;
}

::view-transition-new(section-content) {
  animation-name: fadeInUp;
}

.section.active > .container {
  view-transition-name: section-content;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 640px) {
  .container { padding: 0 var(--space-5); }
  h1 { font-size: var(--text-2xl); }
  .hero { padding: var(--space-9) 0 var(--space-8); }
  .hero::before { width: 300px; height: 200px; }
  .hero .stats { gap: var(--space-7); }
  .play-layout { grid-template-columns: 1fr; }
  .prompts-layout { grid-template-columns: 1fr; }
  .finding-compare { grid-template-columns: 1fr; }
  .findings-grid { grid-template-columns: 1fr; }
  .marker-grid { grid-template-columns: 1fr; }
  .stat-row { flex-direction: column; gap: var(--space-5); }
  .profile-detail-grid { grid-template-columns: 1fr; }
  .game-grid { grid-template-columns: 1fr; }
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-7); }
  .game-detail-hero { grid-template-columns: 1fr; gap: var(--space-6); }
  .game-detail-svg-wrap { order: -1; }
  .benchmark-bar-row { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .benchmark-bar-label { text-align: left; min-width: auto; }

  /* Hamburger shows, inline nav hides */
  .nav-toggle { display: flex; }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--card-border);
    flex-direction: column;
    padding: var(--space-3) var(--space-5);
    gap: var(--space-1);
    display: none;
  }

  nav.open { display: flex; }

  nav button {
    width: 100%;
    text-align: left;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius);
  }

  /* Keep theme toggle inline */
  .theme-toggle {
    position: absolute;
    right: calc(var(--space-5) + 44px);
    top: 50%;
    transform: translateY(-50%);
    margin-left: 0;
  }
}

@media (min-width: 641px) {
  .nav-toggle { display: none; }
}

@media (min-width: 1024px) {
  .container { max-width: 960px; }
}