/* Sustainable AI Escape Rooms — shared theme
   Standard: dark iOS + Liquid Glass + education-friendly
   See ~/Documents/Work/2026/KiroCodingAcademy/STANDARDS.md
*/

:root {
  --bg-base: #000000;
  --bg-elev-1: #0B0B0F;
  --bg-elev-2: #16161B;

  --glass-bg: rgba(28, 28, 32, 0.55);
  --glass-bg-strong: rgba(28, 28, 32, 0.75);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-highlight: rgba(255, 255, 255, 0.06);

  --text-primary: #F8F5F0;
  --text-secondary: #A8A29A;
  --text-tertiary: #6E6A63;

  --accent-gold: #F8D264;
  --accent-blue: #4FA8E8;
  --accent-mint: #7CD4B8;
  --accent-coral: #F08A7C;

  --good: #7CD4B8;
  --warn: #F8D264;
  --error: #F08A7C;

  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);

  --r1: var(--accent-blue);
  --r2: var(--accent-gold);
  --r3: var(--accent-mint);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(ellipse at top left, rgba(79, 168, 232, 0.08), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(124, 212, 184, 0.06), transparent 50%),
    var(--bg-base);
  color: var(--text-primary);
  font-family: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  font-size: 19px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 22px 80px;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: 56px;
}
.hero .pretitle {
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-gold);
  padding: 6px 14px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  margin-bottom: 18px;
}
.hero h1 {
  font-size: 3.4rem;
  margin: 0 0 14px 0;
  letter-spacing: 0.3px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.1;
}
.hero .lede {
  font-size: 1.3rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 16px;
  font-style: italic;
  line-height: 1.5;
}
.hero .mission-line {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* Liquid Glass card */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  box-shadow:
    inset 0 1px 0 0 var(--glass-highlight),
    0 12px 40px rgba(0, 0, 0, 0.55);
}

/* Rooms grid */
.rooms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 64px;
}

.room-card {
  display: block;
  text-decoration: none;
  color: var(--text-primary);
  padding: 28px 24px 24px;
  position: relative;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.room-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow:
    inset 0 1px 0 0 var(--glass-highlight),
    0 18px 56px rgba(0, 0, 0, 0.65);
}
.room-card:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 4px;
}

.room-tag {
  display: inline-block;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.74rem;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}
.room-card h2 {
  margin: 0 0 10px 0;
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: 0.2px;
}
.room-card-1 h2 { color: var(--r1); }
.room-card-2 h2 { color: var(--r2); }
.room-card-3 h2 { color: var(--r3); }

.room-desc {
  margin: 0 0 18px 0;
  color: var(--text-primary);
  font-size: 1.05rem;
  line-height: 1.5;
}

.room-takeaway {
  display: block;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 2px solid currentColor;
  border-radius: 4px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
}
.room-card-1 .room-takeaway { color: var(--r1); }
.room-card-2 .room-takeaway { color: var(--r2); }
.room-card-3 .room-takeaway { color: var(--r3); }

.room-meta {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-family: ui-monospace, monospace;
  display: flex;
  gap: 8px;
  align-items: center;
}
.room-meta .dot { opacity: 0.5; }

/* Why section */
.why {
  max-width: 720px;
  margin: 0 auto;
  padding: 36px 32px;
}
.why h2 {
  font-size: 1.7rem;
  color: var(--accent-gold);
  margin: 0 0 18px 0;
  font-weight: 600;
}
.why p {
  margin: 0 0 16px 0;
  color: var(--text-primary);
}
.why p:last-of-type { margin-bottom: 0; }

.text-link {
  color: var(--accent-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(248, 210, 100, 0.3);
  transition: border-color 0.15s;
}
.text-link:hover { border-bottom-color: var(--accent-gold); }
.text-link:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Education-friendly inline citation */
.cite {
  display: block;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-top: 10px;
  font-family: ui-monospace, monospace;
  font-style: normal;
}
.cite a { color: var(--accent-blue); border-bottom: 1px solid rgba(79, 168, 232, 0.3); }

/* Footer */
.footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.92rem;
}
.footer a { color: var(--text-secondary); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Mobile */
@media (max-width: 600px) {
  .container { padding: 36px 16px 60px; }
  .hero h1 { font-size: 2.3rem; }
  .hero .lede { font-size: 1.1rem; }
  .room-card { padding: 22px 18px 20px; }
  .room-card h2 { font-size: 1.5rem; }
  .why { padding: 28px 22px; }
}