/* ==========================================================================
   TubeVault - Modern Dark Theme Stylesheet
   Ultra-fast, mobile-responsive, zero-framework CSS
   ========================================================================== */

:root {
  --bg-primary: #0a0b0e;
  --bg-secondary: #12141c;
  --bg-card: #161924;
  --bg-card-hover: #1e2232;
  --border-color: #232738;
  --border-hover: #3b4259;
  
  --accent-fire: #ff4338;
  --accent-orange: #ff7324;
  --accent-gradient: linear-gradient(135deg, #ff4338 0%, #ff7324 100%);
  --accent-glow: rgba(255, 67, 56, 0.35);

  --text-main: #f3f4f8;
  --text-muted: #959cb3;
  --text-dim: #636b84;

  --badge-hd: #e5a93c;
  --badge-source: #3b82f6;
  --badge-rating: #10b981;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(18, 20, 28, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
}

.header-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-transform: uppercase;
}

.brand-logo .logo-tube {
  color: #ffffff;
}

.brand-logo .logo-vault {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.brand-logo .vault-badge {
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: 900;
  letter-spacing: 1px;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Search Input */
.search-wrapper {
  flex: 1;
  max-width: 520px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.6rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--accent-fire);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 0.9rem;
  pointer-events: none;
}

.search-clear {
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  display: none;
  font-size: 1rem;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-pill:hover {
  color: #fff;
  border-color: var(--border-hover);
  background-color: var(--bg-card-hover);
}

.btn-pill.active {
  color: #fff;
  border-color: var(--accent-fire);
  background-color: rgba(255, 67, 56, 0.18);
  box-shadow: 0 0 12px rgba(255, 67, 56, 0.25);
}

.btn-pill.btn-accent {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  box-shadow: 0 4px 14px var(--accent-glow);
}

/* ==========================================================================
   Sub-Navigation / Bar
   ========================================================================== */
.sub-bar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 1.5rem;
}

.sub-bar-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.sub-bar-container::-webkit-scrollbar {
  display: none;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.select-filter {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.select-filter:focus {
  border-color: var(--accent-fire);
}

/* ==========================================================================
   Categories Bar
   ========================================================================== */
.categories-bar {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 1.5rem;
}

.categories-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.categories-container::-webkit-scrollbar {
  display: none;
}

.cat-pill {
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.cat-pill:hover, .cat-pill.active {
  color: #fff;
  background-color: var(--accent-fire);
  border-color: var(--accent-fire);
}


/* ==========================================================================
   Main Content Area
   ========================================================================== */
.main-content {
  flex: 1;
  max-width: 1600px;
  width: 100%;
  margin: 1rem auto;
  padding: 0 1.5rem 3rem 1.5rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

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

.section-title .count-badge {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-card);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
}

/* Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Video Card */
.video-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.7);
}

/* Thumbnail Wrapper */
.thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #000;
  overflow: hidden;
}

.thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.video-card:hover .thumb-img {
  transform: scale(1.02);
}

/* Scrub Progress Bar */
.scrub-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: rgba(255, 255, 255, 0.2);
  display: none;
  z-index: 10;
}

.scrub-bar {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
}

.video-card:hover .scrub-progress {
  display: block;
}

/* Overlays / Badges */
.badge-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  z-index: 5;
}

.badge-source {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(18, 20, 28, 0.88);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border-color);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 5;
}

.badge-hd {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--badge-hd);
  color: #000;
  font-size: 0.65rem;
  font-weight: 900;
  padding: 2px 5px;
  border-radius: 3px;
  z-index: 5;
}

/* Play Icon Overlay on Hover */
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.25);
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 4;
}

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

.play-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 18px var(--accent-glow);
  transform: scale(0.9);
  transition: transform 0.2s ease;
}

.video-card:hover .play-circle {
  transform: scale(1);
}

/* Card Info */
.card-info {
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.video-title {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-main);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 2.4em;
}

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

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: auto;
}

.meta-stats {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.rating-high {
  color: var(--badge-rating);
  font-weight: 700;
}

/* Card Categories */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.2rem;
}

.mini-tag {
  font-size: 0.7rem;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  padding: 1px 6px;
  border-radius: 3px;
}

/* ==========================================================================
   Pagination & Load More
   ========================================================================== */
.pagination-wrapper {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.btn-load-more {
  padding: 0.85rem 2.5rem;
  border-radius: 999px;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 18px var(--accent-glow);
}

.btn-load-more:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 1.5rem 1.5rem 1.5rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 900px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   18+ Age Verification Modal
   ========================================================================== */
.age-modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 1.5rem;
}

.age-modal {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.age-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 1.25rem auto;
  box-shadow: 0 0 20px var(--accent-glow);
}

.age-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.age-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.age-actions {
  display: flex;
  gap: 1rem;
}

.age-actions button {
  flex: 1;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-enter {
  background: var(--accent-gradient);
  border: none;
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-enter:hover {
  transform: translateY(-2px);
}

.btn-exit {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-exit:hover {
  background-color: var(--bg-card);
  color: #fff;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 768px) {
  .header-container {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .search-wrapper {
    order: 3;
    max-width: 100%;
  }
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
  }
  .main-content {
    padding: 0 1rem 2rem 1rem;
  }
}