/* CSS Variables */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-surface: rgba(15, 23, 42, 0.85);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent-primary: #38bdf8;
  --accent-muted: rgba(56, 189, 248, 0.15);
  --border-color: rgba(148, 163, 184, 0.3);
  --overlay-bg: rgba(2, 6, 23, 0.85);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 45%, #020617 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-icon {
  font-size: 1.5rem;
  background: var(--accent-muted);
  padding: 0.5rem;
  border-radius: 0.5rem;
  line-height: 1;
}

.nav-text h1 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link:hover {
  color: var(--accent-primary);
}

/* Hero Section */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Category Filter */
.filter-section {
  padding: 2rem 0;
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.filter-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: capitalize;
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-muted);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Games Section */
.games-section {
  padding: 2rem 0;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.games-grid {
  display: grid;
  gap: 1rem;
}

.games-grid-featured {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.games-grid-more {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

/* Game Card */
.game-card {
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  overflow: hidden;
  transition: all 0.3s;
  cursor: pointer;
  position: relative;
}

.game-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.2);
}

.game-card-image {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.game-card-featured .game-card-image {
  height: 220px;
}

.game-card-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    rgba(56, 189, 248, 0.1) 0%, 
    rgba(139, 92, 246, 0.1) 100%);
  opacity: 0;
  transition: opacity 0.3s;
}

.game-card:hover .game-card-image::before {
  opacity: 1;
}

.game-card-content {
  padding: 1.25rem;
}

.game-card-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 0.75rem;
  gap: 0.75rem;
}

.game-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.category-badge {
  background: var(--accent-muted);
  color: var(--accent-primary);
  padding: 0.25rem 0.625rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: capitalize;
  white-space: nowrap;
}

.game-card-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.game-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.game-card:hover .play-overlay {
  opacity: 1;
}

.play-btn {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transform: translateY(10px);
  transition: transform 0.3s;
}

.game-card:hover .play-btn {
  transform: translateY(0);
}

/* Game Overlay Modal */
.game-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.game-modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  width: 76vw;
  height: 76vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to { 
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.game-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
}

.game-modal-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.game-modal-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-category-badge {
  background: var(--accent-muted);
  color: var(--accent-primary);
  padding: 0.375rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: capitalize;
}

.close-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.close-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.game-modal-body {
  flex: 1;
  overflow: hidden;
  background: #000;
}

.game-frame {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Footer */
.footer {
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-content p {
  margin-bottom: 0.5rem;
}

.footer-credits {
  font-size: 0.8rem;
}

.footer-credits a {
  color: var(--accent-primary);
  text-decoration: none;
}

.footer-credits a:hover {
  text-decoration: underline;
}

/* Utility Classes */
.icon {
  width: 1.25rem;
  height: 1.25rem;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .games-grid-featured,
  .games-grid-more {
    grid-template-columns: 1fr;
  }
  
  .game-modal {
    width: 90vw;
    height: 90vh;
  }
  
  .nav-links {
    gap: 1rem;
  }
}

/* Hidden utility */
[hidden] {
  display: none !important;
}