/* ==========================================================================
   🎮 AI Class Games Portal — Dark RPG Glassmorphism Theme
   Designed to match Nisit Zombie aesthetic:
   - Deep dark slate canvas (#080c16 / #0f172a)
   - Kanit typography with bold gaming hierarchy
   - Gold & amber beveled borders (#f59e0b / #fbbf24)
   - Tactile 3D RPG action buttons
   - Dark pedestals with sprite drop shadows & glow badges
   ========================================================================== */

:root {
  --bg-deep: #080c16;
  --bg-surface: #0f172a;
  --bg-card: rgba(18, 26, 44, 0.9);
  --bg-card-hover: rgba(26, 38, 64, 0.95);
  --border-card: rgba(251, 191, 36, 0.28);
  --border-card-hover: rgba(251, 191, 36, 0.65);
  --glow-gold: rgba(245, 158, 11, 0.25);

  --gold-300: #fde68a;
  --gold-400: #fbbf24;
  --gold-500: #f59e0b;
  --gold-600: #d97706;

  --emerald-400: #34d399;
  --emerald-500: #10b981;
  --cyan-400: #38bdf8;
  --cyan-500: #0ea5e9;
  --purple-400: #c084fc;
  --purple-500: #a855f7;
  --rose-400: #fb7185;
  --rose-500: #f43f5e;

  --text-main: #f8fafc;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-thai: 'Kanit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-thai);
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(30, 58, 138, 0.32) 0%, transparent 60%),
    radial-gradient(ellipse at 85% 60%, rgba(168, 85, 247, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 15% 85%, rgba(245, 158, 11, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-card);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  font-size: 1.8rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(168, 85, 247, 0.25));
  border: 1.5px solid var(--gold-400);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  box-shadow: 0 4px 14px var(--glow-gold);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
  letter-spacing: -0.2px;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--gold-400);
  font-weight: 600;
  font-family: var(--font-mono);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--gold-300);
}

.btn-cta-nav {
  text-decoration: none;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: 10px;
  border: 1px solid var(--gold-300);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
  transition: all 0.2s ease;
}

.btn-cta-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(245, 158, 11, 0.5);
  filter: brightness(1.1);
}

/* Hero Section */
.hero-section {
  padding: 48px 20px 36px;
  text-align: center;
}

.hero-container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: var(--gold-300);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  box-shadow: 0 2px 10px rgba(245, 158, 11, 0.2);
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  letter-spacing: -0.5px;
}

.highlight-text {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #fb7185 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-body);
  max-width: 780px;
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 8px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-card);
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.stat-pill strong {
  color: #fff;
}

.stat-icon {
  font-size: 1.1rem;
}

/* Games Section */
.games-section {
  padding: 24px 20px 60px;
}

.section-container {
  max-width: 1240px;
  margin: 0 auto;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.section-tag {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--gold-400);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
}

.section-title-box h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.3px;
}

.filter-pills {
  display: flex;
  gap: 8px;
}

.filter-btn {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-family: var(--font-thai);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn.active, .filter-btn:hover {
  background: rgba(251, 191, 36, 0.15);
  border-color: var(--gold-400);
  color: #fff;
}

/* Games Grid */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 22px;
}

/* Game Card */
.game-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border-card);
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(14px);
}

.game-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 24px var(--glow-gold);
}

/* Visual Canvas Top of Card */
.card-visual {
  height: 160px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1.5px solid var(--border-card);
}

.visual-pigs {
  background: radial-gradient(circle at 50% 60%, #1e3a5f 0%, #0d1527 100%);
}

.visual-maze {
  background: radial-gradient(circle at 50% 60%, #1e293b 0%, #0b1120 100%);
}

.visual-robot {
  background: radial-gradient(circle at 50% 60%, #2e1065 0%, #0c081e 100%);
}

.card-badge-row {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
}

.badge-status.live {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--emerald-400);
  color: var(--emerald-400);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge-featured {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
}

.visual-characters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.portal-pixel-art {
  width: 52px;
  height: 52px;
  object-fit: contain;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.75));
  transition: transform 0.2s ease;
}

.game-card:hover .portal-pixel-art {
  transform: scale(1.08) translateY(-2px);
}

/* Card Content */
.card-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meta-tag {
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.3);
  color: var(--gold-300);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
}

.game-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.2px;
}

.game-desc {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.55;
  flex: 1;
}

.skills-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 6px;
}

.card-footer {
  margin-top: 6px;
}

.btn-play {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 18px;
  border-radius: 12px;
  font-family: var(--font-thai);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  border: 1px solid var(--emerald-400);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: all 0.2s ease;
}

.btn-play:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(16, 185, 129, 0.55);
}

.btn-arrow {
  font-size: 1.1rem;
  transition: transform 0.2s ease;
}

.btn-play:hover .btn-arrow {
  transform: translateX(4px);
}

/* Pillars Section */
.curriculum-section {
  padding: 50px 20px 60px;
  background: rgba(10, 15, 28, 0.7);
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}

.text-center {
  text-align: center;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border-card);
  border-radius: 16px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  transition: all 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold-400);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.pillar-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.pillar-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Footer */
.app-footer {
  padding: 24px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #060911;
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #fff;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-badge {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--gold-400);
  background: rgba(251, 191, 36, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(251, 191, 36, 0.25);
}