:root {
  --bg-color: #09090b;
  --surface-color: #18181b;
  --surface-hover: #27272a;
  --primary-color: #f59e0b; /* Amber */
  --primary-hover: #fbbf24;
  --accent-color: #e11d48;
  --text-main: #fafafa;
  --text-muted: #a1a1aa;
  --glass-bg: rgba(9, 9, 11, 0.85);
  --glass-border: rgba(255, 255, 255, 0.1);
  --border-radius: 6px;
  --transition-speed: 0.25s;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Glassmorphism Nav */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--glass-border);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--primary-color);
}

.search-bar {
  position: relative;
  width: 100%;
  max-width: 450px;
}

.search-bar input {
  width: 100%;
  padding: 0.75rem 1.25rem;
  padding-left: 2.75rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
  background-color: var(--surface-color);
  color: white;
  outline: none;
  font-size: 0.95rem;
  transition: all var(--transition-speed);
}

.search-bar input:focus {
  background-color: var(--surface-hover);
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Main Container */
.container {
  padding: 2rem;
  max-width: 1440px;
  margin: 0 auto;
  flex: 1;
  width: 100%;
}

/* Category Filters */
.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.sort-select {
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  outline: none;
  cursor: pointer;
  font-size: 0.9rem;
}
.sort-select:focus {
  border-color: var(--primary-color);
}

.category-filters {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scrollbar-width: none; /* Firefox */
  flex: 1; /* allow it to take available space */
}
.category-filters::-webkit-scrollbar {
  height: 4px;
}
.category-filters::-webkit-scrollbar-thumb {
  background-color: var(--surface-hover);
  border-radius: 4px;
}

.chip {
  padding: 0.5rem 1.25rem;
  border-radius: var(--border-radius);
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  white-space: nowrap;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-speed);
}

.chip:hover {
  background-color: var(--surface-hover);
  border-color: rgba(255,255,255,0.2);
}

.chip.active {
  background-color: var(--primary-color);
  color: #09090b;
  border-color: var(--primary-color);
  font-weight: 600;
}

/* Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Video Card */
.video-card {
  display: flex;
  flex-direction: column;
  background-color: transparent;
  border-radius: var(--border-radius);
  overflow: hidden;
  text-decoration: none;
  transition: transform var(--transition-speed);
  position: relative;
}

.video-card:hover {
  transform: translateY(-4px);
}

.thumbnail-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
}

.thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .thumbnail {
  transform: scale(1.05);
}

.play-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-speed);
}

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

.play-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.video-info {
  padding: 0.75rem 0.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.video-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-speed);
}

.video-card:hover .video-title {
  color: var(--primary-color);
}

.video-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.tag-badge {
  background-color: var(--surface-color);
  color: var(--text-muted);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-weight: 500;
  border: 1px solid var(--glass-border);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 3rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.page-btn {
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  min-width: 40px;
  height: 40px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
}

.page-btn:hover:not(.active) {
  background-color: var(--surface-hover);
  border-color: rgba(255,255,255,0.2);
}

.page-btn.active {
  background-color: var(--primary-color);
  color: #09090b;
  border-color: var(--primary-color);
  pointer-events: none;
}

/* Video Player Page Specific Styles */
.video-player-container {
  max-width: 1200px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 1.5rem;
  transition: color var(--transition-speed);
}

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

.player-wrapper {
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border: 1px solid var(--glass-border);
  margin-bottom: 1.5rem;
}

.player-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-details {
  background: transparent;
  padding: 0 0.5rem;
  margin-bottom: 3rem;
}

.video-details h1 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #fff;
  line-height: 1.3;
}

.video-details-meta {
  display: flex;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}

.meta-info {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.share-actions {
  display: flex;
  gap: 0.75rem;
}

.action-btn {
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-speed);
}

.action-btn:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary-color);
}

.action-btn.success {
  border-color: #22c55e;
  color: #22c55e;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.tag-pill {
  background-color: var(--surface-color);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--glass-border);
  transition: all 0.2s;
}

.tag-pill:hover {
  border-color: var(--primary-color);
  color: var(--text-main);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.spin-animation {
  animation: spin 1s linear infinite;
}

.action-btn.liked {
  color: var(--accent-color) !important;
  border-color: var(--accent-color) !important;
  background: rgba(225, 29, 72, 0.1);
}

.action-btn.liked svg {
  fill: var(--accent-color);
}

@keyframes heartBeat {
  0% { transform: scale(1); }
  25% { transform: scale(1.2); }
  50% { transform: scale(1); }
  75% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.heart-beat {
  animation: heartBeat 0.4s ease-in-out;
}

.section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 2px;
}

/* Empty State / No Results */
.no-results {
  text-align: center;
  padding: 4rem 1rem;
  grid-column: 1 / -1;
  color: var(--text-muted);
}
.no-results svg {
  width: 64px;
  height: 64px;
  opacity: 0.5;
  margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }
  .search-bar {
    max-width: 100%;
  }
  .container {
    padding: 1rem;
  }
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
  }
  .video-info {
    padding: 0.5rem 0.25rem;
  }
  .video-title {
    font-size: 0.9rem;
  }
  .video-details h1 {
    font-size: 1.25rem;
  }
}