/* ==========================================================================
   StreamPulse - Ultra-Lightweight Mobile-First Video Stylesheet
   Zero external dependencies • Zero CLS • Touch-Optimized
   ========================================================================== */

:root {
  --bg-main: #090b10;
  --bg-surface: #131722;
  --bg-surface-hover: #1a2030;
  --bg-elevated: #1f273b;
  --border-subtle: #1e2638;
  --border-focus: #6366f1;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  
  --danger: #ef4444;
  --success: #10b981;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  background-color: var(--bg-main);
  color: var(--text-primary);
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  min-height: -webkit-fill-available;
  background-color: var(--bg-main);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  padding-bottom: calc(var(--safe-bottom) + 20px);
  overflow-x: hidden;
}

/* Header & Navigation */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 11, 16, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: calc(var(--safe-top) + 12px) 16px 12px;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header-container.header-center {
  justify-content: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 2px 10px var(--accent-glow);
  flex-shrink: 0;
}

.brand-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}
/* Main Content Layout */
.main-wrapper {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
  flex: 1;
}


/* Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

/* Video Card */
.video-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  content-visibility: auto;
  contain-intrinsic-size: 0 320px;
}

.video-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.video-card:active {
  transform: scale(0.985);
}

/* Card Thumbnail Container (Zero CLS with aspect-ratio) */
.card-thumbnail-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elevated);
  overflow: hidden;
}


.card-thumbnail {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  z-index: 1;
  transition: transform var(--transition-smooth);
}

.video-card:hover .card-thumbnail {
  transform: scale(1.03);
}

/* Play Button Overlay (Always Visible on all thumbnails) */
.card-play-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  opacity: 1; /* Always visible */
}

.card-play-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.9);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
  transform: scale(1);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.card-play-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
  margin-left: 2px;
}

.video-card:active .card-play-icon {
  transform: scale(0.9);
  background: var(--accent-primary);
}


/* Card Body */
.card-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* Compulsory Mobile Numbered Pagination */
.pagination-wrapper {
  margin-top: 36px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 6px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.pagination-bar::-webkit-scrollbar {
  display: none;
}

.page-links-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.page-link-btn,
.page-nav-link {
  min-height: 40px;
  min-width: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  user-select: none;
}

.page-nav-link {
  padding: 0 14px;
  gap: 4px;
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.page-nav-link svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
}

.page-link-btn:hover,
.page-nav-link:not(.disabled):hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.page-link-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 2px 10px var(--accent-glow);
  pointer-events: none;
}

.page-nav-link.disabled {
  opacity: 0.35;
  pointer-events: none;
  cursor: default;
}

.page-ellipsis {
  min-width: 24px;
  text-align: center;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.pagination-status {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}

/* Watch Page Layout & Full-Bleed Theater Experience */
.watch-page-body {
  padding-left: 0;
  padding-right: 0;
}

.watch-main-wrapper {
  max-width: 100%;
  padding: 0;
  margin: 0 auto;
  flex: 1;
}

@media (min-width: 768px) {
  .watch-main-wrapper {
    padding: 20px 16px;
    max-width: 1200px;
  }
}

.watch-container {
  width: 100%;
  margin: 0 auto;
  padding: 0;
}



/* Theater Player Section */
.player-theater-wrapper {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Video Player Container - Edge-to-Edge on Mobile */
.player-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000000;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

@media (min-width: 768px) {
  .player-container {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
  }
}

.main-video-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000000;
}

/* Related Videos Section Below Player */
.related-section {
  margin-top: 24px;
  padding: 0 12px;
}

@media (min-width: 768px) {
  .related-section {
    padding: 0;
  }
}

.related-header {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}





/* Empty State / Fallback */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 56px;
  height: 56px;
  fill: var(--text-muted);
  margin-bottom: 12px;
}

.empty-state h3 {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}

/* Visually Hidden Utility for SEO & Accessibility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}