/* ============================================
   MODERN DARK THEME VIDEO STREAMING WEBSITE
   Responsive, Professional, & Attractive
   ============================================ */

/* Import Modern Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ========== CSS VARIABLES ========== */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a24;
  --bg-card-hover: #22222e;
  
  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  /* Border & Shadow */
  --border-color: #27273a;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow: 0 0 20px rgba(99, 102, 241, 0.4);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ========== RESET & BASE ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* ========== HEADER ========== */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(18, 18, 26, 0.95);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: var(--transition-fast);
}

.logo:hover {
  filter: brightness(1.2);
  transform: translateY(-2px);
}

.search-bar {
  flex: 1;
  max-width: 500px;
  position: relative;
}

.search-bar input {
  width: 100%;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: var(--glow);
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

/* ========== AD BANNER ========== */
.ad-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  overflow: hidden;
  position: relative;
}

.ad-banner::before {
  content: 'Advertisement';
  position: absolute;
  top: 4px;
  left: 8px;
  font-size: 0.7rem;
  opacity: 0.5;
}

.ad-banner.header-ad {
  height: 90px;
  width: 728px;
  max-width: 100%;
}

.ad-banner.sidebar-ad {
  width: 300px;
  height: 600px;
}

.ad-banner.footer-ad {
  height: 90px;
  width: 728px;
  max-width: 100%;
  margin: 0 auto;
}

/* ========== MAIN LAYOUT ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.main-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.content-area {
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

/* ========== PAGE HEADER ========== */
.page-header {
  margin-bottom: var(--spacing-lg);
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ========== VIDEO GRID ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  cursor: pointer;
  border: 1px solid var(--border-color);
  position: relative;
}

.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg), var(--glow);
  border-color: var(--accent-primary);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-secondary);
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.1);
  filter: brightness(1.2);
}

.video-thumbnail::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition-normal);
}

.video-card:hover .video-thumbnail::after {
  opacity: 1;
}

.play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 60px;
  height: 60px;
  background: rgba(99, 102, 241, 0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
  z-index: 2;
}

.video-card:hover .play-icon {
  transform: translate(-50%, -50%) scale(1);
}

.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 16px solid white;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}

.video-info {
  padding: var(--spacing-md);
}

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

.video-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-xs);
}

.video-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  border-radius: 20px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 500;
}

.video-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== PAGINATION ========== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
}

.pagination button {
  padding: 12px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: inherit;
}

.pagination button:hover:not(:disabled) {
  background: var(--accent-gradient);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pagination button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination .page-info {
  padding: 12px 20px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
}

.footer-ad-container {
  margin-bottom: var(--spacing-lg);
  display: flex;
  justify-content: center;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ========== VIDEO PAGE ========== */
.video-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.video-player {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.video-player iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  display: block;
}

.video-details {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-color);
}

.video-details h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.video-details-meta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.related-videos-section {
  margin-top: var(--spacing-xl);
}

.related-videos-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

/* ========== LOADING STATE ========== */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========== RESPONSIVE DESIGN ========== */

/* Tablet (768px - 1199px) */
@media (max-width: 1199px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: static;
    margin-top: var(--spacing-lg);
  }
  
  .ad-banner.sidebar-ad {
    width: 100%;
    height: 250px;
  }
}

@media (max-width: 991px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .page-header h1 {
    font-size: 2rem;
  }
  
  .header-content {
    flex-wrap: wrap;
  }
  
  .search-bar {
    order: 3;
    flex-basis: 100%;
    max-width: 100%;
  }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  .video-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .container {
    padding: var(--spacing-md);
  }
  
  .page-header h1 {
    font-size: 1.5rem;
  }
  
  .page-header p {
    font-size: 0.95rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .pagination button {
    padding: 10px 16px;
    font-size: 0.85rem;
  }
  
  .pagination .page-info {
    display: none;
  }
  
  .ad-banner.header-ad,
  .ad-banner.footer-ad {
    width: 320px;
    height: 100px;
  }
  
  .video-details h1 {
    font-size: 1.3rem;
  }
  
  .footer {
    padding: var(--spacing-lg) 0;
  }
}

/* Extra Small Mobile (< 480px) */
@media (max-width: 479px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
  }
  
  .video-card {
    border-radius: var(--radius-md);
  }
  
  .video-info {
    padding: var(--spacing-sm);
  }
  
  .ad-banner.header-ad,
  .ad-banner.footer-ad {
    width: 100%;
    height: 90px;
  }
}

/* ========== UTILITIES ========== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden {
  display: none !important;
}