@tailwind base;
@tailwind components;
@tailwind utilities;

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
  overflow-x: hidden;
  font-size: 16px;
}

body {
  font-family: 'Cairo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  direction: rtl;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  contain: layout style;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  overflow: hidden;
  contain: layout;
}

/* Header Styles */
.header {
  background: rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(31, 38, 135, 0.25);
  backdrop-filter: blur(10px);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  min-height: 3rem;
}

.logo h1 {
  color: #fff;
  font-size: clamp(1.25rem, 4vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 0.1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  line-height: 1.1;
}

.logo p {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(0.7rem, 2vw, 0.9rem);
  font-weight: 300;
}

.nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  font-weight: 500;
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
}

.nav-link:hover {
  background: linear-gradient(45deg, #ff6b6b, #feca57);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* Main Content */
.main {
  flex: 1;
  padding: 1rem 0;
  min-height: calc(100vh - 120px);
  overflow: hidden;
  contain: layout style;
  position: relative;
}

.page {
  display: none;
  animation: fadeIn 0.5s ease-in-out;
  overflow: hidden;
  contain: layout style;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(10px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 2rem;
  padding: 1.5rem 0;
}

.hero-title {
  font-size: clamp(1.75rem, 6vw, 3rem);
  color: #fff;
  margin-bottom: 0.75rem;
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(0.9rem, 3vw, 1.2rem);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 300;
  line-height: 1.4;
}

/* Year Selection */
.year-selection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.year-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.08));
  border-radius: 12px;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.year-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, #ff9a9e, #fecfef, #fecfef, #ff9a9e);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.year-card:hover::before {
  opacity: 0.1;
}

.year-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.year-icon {
  font-size: clamp(2.5rem, 8vw, 4rem);
  color: #feca57;
  margin-bottom: 0.75rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.year-card h3 {
  color: #fff;
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  margin-bottom: 0.5rem;
  font-weight: 600;
  line-height: 1.2;
}

.year-card p {
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.year-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: linear-gradient(45deg, #ff6b6b, #feca57);
  color: #fff;
  padding: 0.25rem 0.6rem;
  border-radius: 12px;
  font-size: clamp(0.7rem, 2vw, 0.8rem);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header h2 {
  color: #fff;
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 600;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  line-height: 1.2;
}

.btn-back {
  background: linear-gradient(45deg, #ff6b6b, #feca57);
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: clamp(0.8rem, 2.5vw, 1rem);
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
}

.btn-back:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* Grid Layouts */
.subjects-grid,
.teachers-grid,
.classes-grid,
.lectures-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.subjects-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
}

.teachers-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
}

.classes-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(230px, 100%), 1fr));
}

.lectures-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
}

/* Card Styles */
.subject-card,
.teacher-card,
.class-card,
.lecture-card {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

.subject-card::before,
.teacher-card::before,
.class-card::before,
.lecture-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, #a8edea, #fed6e3);
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: -1;
}

.subject-card:hover::before,
.teacher-card:hover::before,
.class-card:hover::before,
.lecture-card:hover::before {
  opacity: 0.08;
}

.subject-card:hover,
.teacher-card:hover,
.class-card:hover,
.lecture-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* Teacher Card Specific */
.teacher-card {
  text-align: center;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.teacher-avatar {
  width: clamp(50px, 12vw, 70px);
  height: clamp(50px, 12vw, 70px);
  border-radius: 50%;
  margin: 0 auto 1rem;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.teacher-name {
  color: #fff;
  font-size: clamp(1rem, 3vw, 1.2rem);
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.teacher-subject {
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.teacher-stats {
  display: flex;
  justify-content: space-around;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.stat {
  text-align: center;
  flex: 1;
}

.stat-number {
  color: #feca57;
  font-size: clamp(1.1rem, 3.5vw, 1.5rem);
  font-weight: 700;
  display: block;
  line-height: 1.1;
}

.stat-label {
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(0.7rem, 2vw, 0.8rem);
  line-height: 1.2;
}

.teacher-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.btn-star,
.btn-heart {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.7);
  padding: 0.4rem;
  border-radius: 50%;
  width: clamp(32px, 8vw, 40px);
  height: clamp(32px, 8vw, 40px);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.8rem, 2vw, 1rem);
}

.btn-star:hover,
.btn-heart:hover {
  background: linear-gradient(45deg, #ff9a9e, #fecfef);
  color: #fff;
  transform: scale(1.05);
}

.btn-star.active {
  background: linear-gradient(45deg, #feca57, #ff9a9e);
  color: #fff;
  border-color: #feca57;
}

/* Lecture Card Specific */
.lecture-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  gap: 0.75rem;
}

.lecture-title {
  color: #fff;
  font-size: clamp(1rem, 3vw, 1.2rem);
  font-weight: 600;
  flex: 1;
  line-height: 1.3;
}

.lecture-description {
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(0.8rem, 2.5vw, 0.9rem);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.lecture-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.lecture-duration {
  color: #feca57;
  font-size: clamp(0.8rem, 2.5vw, 0.9rem);
  font-weight: 500;
}

.btn-check {
  background: none;
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.7);
  padding: 0.25rem;
  border-radius: 50%;
  width: clamp(28px, 7vw, 35px);
  height: clamp(28px, 7vw, 35px);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.7rem, 2vw, 0.9rem);
}

.btn-check:hover {
  border-color: #48ca8b;
  color: #48ca8b;
  transform: scale(1.05);
}

.btn-check.completed {
  background: linear-gradient(45deg, #48ca8b, #56ab2f);
  border-color: #48ca8b;
  color: #fff;
}

.lecture-card.completed {
  background: rgba(72, 202, 139, 0.2);
  border-color: rgba(72, 202, 139, 0.4);
}

/* Video Player */
.player-container {
  max-width: min(1200px, 95vw);
  margin: 0 auto;
}

.video-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: min(56.25%, 70vh); /* Responsive aspect ratio */
  margin-bottom: 1.5rem;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  background: #000;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: #000;
  object-fit: contain;
}

/* Video Player - Simple and Fast */
.player-container {
  max-width: min(1200px, 95vw);
  margin: 0 auto;
  overflow: hidden; /* Prevent content from extending beyond boundaries */
  contain: layout style;
  position: relative;
  z-index: 1;
}

.video-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: min(56.25%, 70vh);
  margin-bottom: 1.5rem;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  background: #000;
  contain: layout style; /* Improve rendering performance */
}

.video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: #000;
  object-fit: contain;
}

/* Hide all native video controls completely to prevent double controls */
video::-webkit-media-controls {
  display: none !important;
}

video::-webkit-media-controls-panel {
  display: none !important;
}

video::-webkit-media-controls-play-button {
  display: none !important;
}

video::-webkit-media-controls-start-playback-button {
  display: none !important;
}

video::-webkit-media-controls-timeline {
  display: none !important;
}

video::-webkit-media-controls-current-time-display {
  display: none !important;
}

video::-webkit-media-controls-time-remaining-display {
  display: none !important;
}

video::-webkit-media-controls-mute-button {
  display: none !important;
}

video::-webkit-media-controls-volume-slider {
  display: none !important;
}

video::-webkit-media-controls-fullscreen-button {
  display: none !important;
}

video::-webkit-media-controls-toggle-closed-captions-button {
  display: none !important;
}

/* Firefox */
video::-moz-media-controls {
  display: none !important;
}

/* Microsoft Edge/IE */
video::-ms-media-controls {
  display: none !important;
}

/* Force video to never show controls */
video {
  -webkit-appearance: none;
  appearance: none;
}

video[controls] {
  -webkit-appearance: none;
  appearance: none;
}

/* Enhanced fullscreen controls auto-hide - YouTube style */
.video-wrapper:fullscreen .custom-controls,
.video-wrapper:-webkit-full-screen .custom-controls,
.video-wrapper:-moz-full-screen .custom-controls {
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.video-wrapper:fullscreen .custom-controls.show,
.video-wrapper:-webkit-full-screen .custom-controls.show,
.video-wrapper:-moz-full-screen .custom-controls.show {
  opacity: 1;
  pointer-events: all;
}

/* iOS Safari fullscreen specific */
video:-webkit-full-screen ~ .custom-controls {
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

video:-webkit-full-screen ~ .custom-controls.show {
  opacity: 1;
  pointer-events: all;
}

/* Force hide controls in fullscreen after timeout */
.video-wrapper:fullscreen .custom-controls:not(.show),
.video-wrapper:-webkit-full-screen .custom-controls:not(.show),
.video-wrapper:-moz-full-screen .custom-controls:not(.show) {
  opacity: 0 !important;
  visibility: hidden;
  pointer-events: none;
}

/* Ensure smooth transitions in fullscreen */
.video-wrapper:fullscreen,
.video-wrapper:-webkit-full-screen,
.video-wrapper:-moz-full-screen {
  background: #000;
}

.video-wrapper:fullscreen .custom-controls,
.video-wrapper:-webkit-full-screen .custom-controls,
.video-wrapper:-moz-full-screen .custom-controls {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 60%, transparent 100%);
}

/* Video watermark removed - no longer needed */

/* Bunny.net Style Video Player Controls - Enhanced Auto-Hide */
.custom-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.5) 60%, transparent 100%);
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 100;
  pointer-events: none;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Show controls only when .show class is present */
.custom-controls.show {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

/* Force hide controls when not showing */
.custom-controls:not(.show) {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

/* Bunny.net Progress Bar Style */
.progress-container {
  padding: 12px 16px 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 1.5px;
  position: relative;
  overflow: visible;
  cursor: pointer;
}

.progress-buffered {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 1.5px;
  width: 0%;
  transition: width 0.2s ease;
}

.progress-played {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: #ff6b35;
  border-radius: 1.5px;
  width: 0%;
  transition: width 0.1s ease;
}

.progress-handle {
  position: absolute;
  top: 50%;
  transform: translateY(-50%) translateX(-50%);
  width: 12px;
  height: 12px;
  background: #ff6b35;
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.3);
  left: 0%;
  opacity: 0;
  transition: all 0.2s ease;
  cursor: pointer;
}

.progress-container:hover .progress-handle,
.progress-container.dragging .progress-handle {
  opacity: 1;
}

.progress-bar:hover {
  height: 5px;
  margin-top: -1px;
}

.progress-bar:hover .progress-handle {
  width: 14px;
  height: 14px;
}

/* Bunny.net Controls Bar Style */
.controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px 14px;
  gap: 12px;
}

.controls-left,
.controls-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.control-btn {
  background: none;
  border: none;
  color: #fff;
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  position: relative;
  z-index: 10;
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
}

.control-btn:active {
  transform: scale(0.95);
  background: rgba(255, 255, 255, 0.25);
}

.control-btn:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.2);
}

.control-btn i {
  pointer-events: none;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.3));
}

/* Bunny.net Play Button Style */
#play-pause-btn {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  min-width: 40px;
}

#play-pause-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

/* Bunny.net Volume Control Style */
.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Desktop-only controls */
.desktop-only {
  display: flex;
}

/* Hide volume controls on mobile - use device volume instead */
@media (max-width: 768px) {
  .desktop-only {
    display: none !important;
  }
}

.volume-slider {
  width: 70px;
  opacity: 0;
  transform: scaleX(0);
  transition: all 0.3s ease;
  transform-origin: left;
}

.volume-control:hover .volume-slider {
  opacity: 1;
  transform: scaleX(1);
}

.volume-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 1.5px;
  position: relative;
  cursor: pointer;
}

.volume-fill {
  height: 100%;
  background: #fff;
  border-radius: 1.5px;
  width: 100%;
  transition: width 0.1s ease;
}

.volume-handle {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%) translateX(50%);
  width: 10px;
  height: 10px;
  background: #fff;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  opacity: 0;
}

.volume-bar:hover .volume-handle {
  opacity: 1;
  transform: translateY(-50%) translateX(50%) scale(1.2);
}

/* Bunny.net Time Display Style */
.time-display {
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  margin-left: 8px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}

/* Bunny.net Speed Control Style */
.speed-control {
  position: relative;
}

.speed-btn {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 12px;
  gap: 4px;
  min-width: auto;
  height: 28px;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.speed-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.2);
}

.speed-btn span {
  font-weight: 600;
  min-width: 18px;
  text-align: center;
  font-size: 11px;
}

.speed-menu {
  position: absolute;
  bottom: 100%;
  right: 0;
  background: rgba(24, 24, 24, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 6px;
  padding: 8px 0;
  margin-bottom: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  min-width: 60px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.speed-control:hover .speed-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.speed-option {
  padding: 8px 12px;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease;
  font-size: 12px;
  text-align: center;
  font-weight: 600;
}

.speed-option:hover {
  background: rgba(255, 255, 255, 0.1);
}

.speed-option.active {
  background: #ff6b35;
  color: #fff;
}

/* Video Loading */
.video-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.video-loading.show {
  opacity: 1;
  visibility: visible;
}

.video-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top: 3px solid #ff4757;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Zoom Effect - Enhanced with pinch support */
.video-wrapper.zoomed video {
  transform: scale(1.6);
  transition: transform 0.3s ease;
  transform-origin: center;
}

.video-wrapper.zoom-1-1 video { transform: scale(1.1); }
.video-wrapper.zoom-1-2 video { transform: scale(1.2); }
.video-wrapper.zoom-1-3 video { transform: scale(1.3); }
.video-wrapper.zoom-1-4 video { transform: scale(1.4); }
.video-wrapper.zoom-1-5 video { transform: scale(1.5); }
.video-wrapper.zoom-1-6 video { transform: scale(1.6); }

/* Video Toast Messages */
.video-toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 200;
  pointer-events: none;
  backdrop-filter: blur(4px);
}

.video-toast.show {
  opacity: 1;
  visibility: visible;
}

/* Mobile Skip Indicators */
.skip-indicator {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 80px;
  height: 80px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 150;
  pointer-events: none;
}

.skip-indicator.left {
  left: 20px;
}

.skip-indicator.right {
  right: 20px;
}

.skip-indicator.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) scale(1.1);
}

.skip-indicator i {
  font-size: 24px;
  margin-bottom: 4px;
}

.skip-indicator span {
  font-size: 12px;
  font-weight: 600;
}

/* Picture-in-Picture and AirPlay buttons */
#pip-btn, #airplay-btn {
  background: rgba(255, 255, 255, 0.1);
}

#pip-btn:hover, #airplay-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

#airplay-btn.available {
  background: rgba(0, 122, 255, 0.8);
}

/* Enhanced Speed Control */
.speed-btn span {
  min-width: 24px;
  text-align: center;
}

.speed-menu {
  min-width: 60px;
}

/* Enhanced Mobile Responsive - Smaller, More Appropriate Controls */
@media (max-width: 768px) {
  .custom-controls {
    padding: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 70%, transparent 100%);
  }
  
  .progress-container {
    padding: 8px 12px 0;
  }
  
  .progress-bar {
    height: 6px;
    cursor: pointer;
  }
  
  .progress-handle {
    width: 16px;
    height: 16px;
    opacity: 1;
  }
  
  .controls-bar {
    padding: 6px 12px 10px;
    gap: 6px;
    flex-wrap: nowrap;
  }
  
  .controls-left,
  .controls-right {
    gap: 4px;
  }
  
  .control-btn {
    min-width: 32px;
    height: 32px;
    font-size: 14px;
    padding: 6px;
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
  }
  
  #play-pause-btn {
    min-width: 34px;
    height: 34px;
    font-size: 15px;
  }
  
  #fullscreen-btn {
    min-width: 32px;
    height: 32px;
    font-size: 14px;
  }
  
  .time-display {
    font-size: 11px;
    font-weight: 600;
    margin-left: 4px;
  }
  
  .speed-btn {
    padding: 4px 6px;
    font-size: 10px;
    min-height: 32px;
    width: 36px;
  }
  
  /* Hide volume controls on mobile */
  .desktop-only {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .custom-controls {
    padding: 0;
  }
  
  .progress-container {
    padding: 6px 10px 0;
  }
  
  .controls-bar {
    padding: 5px 10px 8px;
    gap: 4px;
    justify-content: space-between;
  }
  
  .controls-left {
    gap: 3px;
  }
  
  .controls-right {
    gap: 3px;
  }
  
  .controls-left .time-display {
    font-size: 10px;
    margin-left: 3px;
  }
  
  .volume-control {
    position: relative;
  }
  
  .volume-slider {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    margin-bottom: 8px;
    width: 70px;
    background: rgba(0, 0, 0, 0.9);
    padding: 8px;
    border-radius: 6px;
    opacity: 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
  }
  
  .volume-control:hover .volume-slider,
  .volume-control.show .volume-slider {
    opacity: 1;
    transform: translateX(-50%) scaleX(1);
  }
  
  .controls-right {
    flex-wrap: nowrap;
    justify-content: flex-end;
  }
  
  .control-btn {
    min-width: 28px;
    height: 28px;
    font-size: 12px;
  }
  
  #play-pause-btn {
    min-width: 30px;
    height: 30px;
    font-size: 13px;
  }
  
  #fullscreen-btn {
    min-width: 28px;
    height: 28px;
    font-size: 12px;
  }
  
  .progress-bar {
    height: 8px;
  }
  
  .progress-handle {
    width: 18px;
    height: 18px;
  }
  
  .speed-btn {
    width: 32px;
    font-size: 9px;
    padding: 3px 4px;
  }
  
  /* Ensure zoom button is visible */
  #zoom-btn {
    min-width: 28px;
    background: rgba(255, 255, 255, 0.15);
  }
}

/* iOS Safari Specific Fixes */
@supports (-webkit-touch-callout: none) {
  .video-wrapper {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
  
  .custom-controls {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  
  .control-btn {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
  }
  
  .progress-container,
  .volume-slider {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }
  
  /* Force inline playback */
  video {
    -webkit-playsinline: true;
    -webkit-presentation-mode: inline;
  }
}

/* Enhanced Touch device optimizations - Smaller controls for better UX */
@media (hover: none) and (pointer: coarse) {
  .custom-controls {
    opacity: 1;
    pointer-events: all;
  }
  
  .video-wrapper:hover .custom-controls,
  .custom-controls.show {
    opacity: 1;
    pointer-events: all;
  }
  
  .control-btn {
    min-width: 36px;
    height: 36px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    font-size: 14px;
  }
  
  #play-pause-btn {
    min-width: 38px;
    height: 38px;
    font-size: 15px;
  }
  
  #fullscreen-btn {
    min-width: 36px;
    height: 36px;
    font-size: 14px;
  }
  
  .progress-container {
    padding: 12px 15px 0;
    touch-action: manipulation;
  }
  
  .progress-bar {
    height: 8px;
  }
  
  .progress-handle {
    width: 18px;
    height: 18px;
    opacity: 1;
  }
  
  .volume-bar {
    height: 6px;
  }
  
  .volume-handle {
    width: 14px;
    height: 14px;
  }
  
  /* Always show volume slider on touch devices */
  .volume-control .volume-slider {
    opacity: 0;
    transform: scaleX(0);
    width: 90px;
  }
  
  .volume-control:hover .volume-slider,
  .volume-control.active .volume-slider {
    opacity: 1;
    transform: scaleX(1);
  }
  
  /* Make zoom button more prominent on touch devices */
  #zoom-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
  }
  
  #zoom-btn:active, #zoom-btn.active {
    background: rgba(255, 107, 53, 0.9);
    transform: scale(0.95);
  }
}

/* Prevent zoom on double-tap for controls only */
.custom-controls * {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

/* Video wrapper touch handling */
.video-wrapper {
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

/* Ensure video stays responsive */
.video-wrapper video {
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  will-change: transform;
}

/* Large tablets and desktop - Properly sized controls */
@media (min-width: 769px) and (max-width: 1024px) {
  .control-btn {
    min-width: 38px;
    height: 38px;
    font-size: 15px;
  }
  
  #play-pause-btn {
    min-width: 42px;
    height: 42px;
    font-size: 17px;
  }
  
  .volume-slider {
    width: 90px;
  }
  
  .time-display {
    font-size: 14px;
  }
  
  .speed-btn {
    width: 40px;
    font-size: 11px;
  }
}

/* Ultra-wide screens - Desktop controls */
@media (min-width: 1400px) {
  .control-btn {
    min-width: 40px;
    height: 40px;
    font-size: 17px;
  }
  
  #play-pause-btn {
    min-width: 44px;
    height: 44px;
    font-size: 19px;
  }
  
  .volume-slider {
    width: 100px;
  }
  
  .time-display {
    font-size: 15px;
  }
  
  .speed-btn {
    width: 42px;
    font-size: 12px;
  }
}
@media (max-width: 768px) {
  .video-wrapper {
    padding-bottom: min(56.25%, 50vh);
    border-radius: 12px;
  }
  
  #video-watermark {
    top: 12px;
    left: 12px;
    font-size: 11px;
    padding: 4px 8px;
  }
}

@media (max-width: 480px) {
  .video-wrapper {
    padding-bottom: min(56.25%, 45vh);
    border-radius: 8px;
  }
  
  .lecture-details {
    padding: 1rem;
    margin: 0 0.5rem;
  }
  
  .lecture-actions {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .btn-complete,
  .btn-favorite {
    min-width: 100%;
    padding: 0.7rem 1rem;
  }
  
  .navigation-controls {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .btn-nav {
    min-width: 100%;
    padding: 0.7rem 1rem;
  }
}

.lecture-details {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: min(1.5rem, 4vw);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  max-width: 100%;
  overflow: hidden;
  position: relative;
  z-index: 1;
  contain: layout style;
  box-sizing: border-box;
}

.lecture-details h2 {
  color: #fff;
  font-size: clamp(1.25rem, 4vw, 2rem);
  margin-bottom: 1.25rem;
  text-align: center;
  line-height: 1.2;
}

.teacher-details {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

#teacher-avatar {
  width: clamp(45px, 10vw, 60px);
  height: clamp(45px, 10vw, 60px);
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
  background: linear-gradient(45deg, #667eea, #764ba2);
  display: block;
}

.teacher-details h3 {
  color: #fff;
  font-size: clamp(1rem, 3vw, 1.3rem);
  margin-bottom: 0.2rem;
  line-height: 1.2;
}

.teacher-details p {
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  line-height: 1.3;
}

.lecture-description {
  margin-bottom: 1.5rem;
}

.lecture-description h4 {
  color: #feca57;
  font-size: clamp(1rem, 3vw, 1.2rem);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.lecture-description p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.lecture-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.btn-complete,
.btn-favorite {
  flex: 1;
  min-width: 150px;
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 20px;
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.btn-complete {
  background: linear-gradient(45deg, #48ca8b, #56ab2f);
  color: #fff;
}

.btn-complete.completed {
  background: linear-gradient(45deg, #ff6b6b, #feca57);
}

.btn-favorite {
  background: linear-gradient(45deg, #feca57, #ff9a9e);
  color: #fff;
}

.btn-favorite.active {
  background: linear-gradient(45deg, #ff6b6b, #ff9a9e);
}

.btn-complete:hover,
.btn-favorite:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.navigation-controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-nav {
  flex: 1;
  min-width: 140px;
  padding: 0.8rem 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 20px;
  font-size: clamp(0.85rem, 2.5vw, 1rem);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.btn-nav:hover {
  background: linear-gradient(45deg, #667eea, #764ba2);
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-nav:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: 1.5rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.breadcrumb-item {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.3s ease;
  font-size: clamp(0.8rem, 2.5vw, 0.9rem);
}

.breadcrumb-item:hover {
  color: #feca57;
}

.breadcrumb-item::after {
  content: ' > ';
  margin: 0 0.4rem;
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-item:last-child::after {
  display: none;
}

/* Footer - Fixed for mobile and boundaries */
.footer {
  background: rgba(255, 255, 255, 0.05);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0 1rem;
  margin-top: auto;
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 0;
  contain: layout style;
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  contain: layout;
}

.footer-section h3,
.footer-section h4 {
  color: #fff;
  margin-bottom: 0.75rem;
  font-weight: 600;
  font-size: clamp(0.9rem, 3vw, 1.1rem);
}

.footer-section p,
.footer-section li {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.5;
  font-size: clamp(0.8rem, 2.5vw, 0.9rem);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.4rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: #feca57;
}

.social-links {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.social-links a {
  width: clamp(32px, 8vw, 40px);
  height: clamp(32px, 8vw, 40px);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: linear-gradient(45deg, #ff6b6b, #feca57);
  transform: translateY(-1px);
}

.footer-bottom {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: clamp(0.75rem, 2vw, 0.85rem);
  margin: 0;
}

/* Loading Spinner */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.spinner {
  width: clamp(40px, 10vw, 50px);
  height: clamp(40px, 10vw, 50px);
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid #feca57;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  left: 1rem;
  background: linear-gradient(45deg, #48ca8b, #56ab2f);
  color: #fff;
  padding: 1rem;
  border-radius: 20px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  transform: translateY(100px);
  transition: transform 0.3s ease;
  z-index: 1000;
  font-weight: 500;
  font-size: clamp(0.85rem, 2.5vw, 0.95rem);
  text-align: center;
}

.toast.show {
  transform: translateY(0);
}

.toast.error {
  background: linear-gradient(45deg, #ff6b6b, #feca57);
}

/* Responsive Breakpoints */

/* Small Mobile (320px - 480px) */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 0.75rem;
  }
  
  .header {
    padding: 0.5rem 0;
  }
  
  .header .container {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  
  .nav {
    width: 100%;
    justify-content: center;
  }
  
  .nav-link {
    flex: 1;
    text-align: center;
    min-width: 0;
  }
  
  .main {
    padding: 0.75rem 0;
  }
  
  .hero-section {
    padding: 1rem 0;
    margin-bottom: 1.5rem;
  }
  
  .year-selection {
    gap: 0.75rem;
  }
  
  .year-card {
    padding: 1rem 0.75rem;
    min-height: 150px;
  }
  
  .page-header {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }
  
  .subjects-grid,
  .teachers-grid,
  .classes-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  .lectures-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  .subject-card,
  .teacher-card,
  .class-card,
  .lecture-card {
    padding: 1rem;
  }
  
  .teacher-card {
    min-height: 240px;
  }
  
  .teacher-stats {
    gap: 0.25rem;
  }
  
  .lecture-actions {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .btn-complete,
  .btn-favorite {
    min-width: auto;
  }
  
  .navigation-controls {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .btn-nav {
    min-width: auto;
  }
  
  .lecture-details {
    padding: 1rem;
  }
  
  .teacher-details {
    padding: 0.75rem;
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }
  
  /* Footer mobile fixes */
  .footer {
    padding: 1rem 0 0.5rem;
    margin-top: 1rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
  }
  
  .footer-section {
    padding: 0.5rem 0;
  }
  
  .social-links {
    gap: 0.5rem;
    margin-top: 0.5rem;
  }
  
  .footer-bottom {
    padding-top: 0.75rem;
  }
}

/* Medium Mobile (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
  .subjects-grid,
  .teachers-grid,
  .classes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .lectures-grid {
    grid-template-columns: 1fr;
  }
  
  .lecture-actions {
    gap: 0.5rem;
  }
  
  .navigation-controls {
    gap: 0.5rem;
  }
  
  /* Footer tablet fixes */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

/* Tablet (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .year-selection {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .subjects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .teachers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .classes-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .lectures-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Large Desktop (1025px+) */
@media (min-width: 1025px) {
  .container {
    padding: 0 2rem;
  }
  
  .teachers-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  
  .subjects-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .classes-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
  
  .lectures-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
  
  .toast {
    right: 2rem;
    left: auto;
    max-width: 400px;
    transform: translateX(400px);
  }
  
  .toast.show {
    transform: translateX(0);
  }
  
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
    text-align: left;
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn-back,
  .lecture-actions,
  .navigation-controls {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .page {
    display: block !important;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .teacher-avatar,
  #teacher-avatar {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
  .hero-section {
    padding: 0.5rem 0;
    margin-bottom: 1rem;
  }
  
  .main {
    padding: 0.5rem 0;
  }
  
  .year-card {
    min-height: 120px;
  }
  
  .teacher-card {
    min-height: 200px;
  }
  
  .footer {
    padding: 0.75rem 0 0.5rem;
  }
}

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

/* Focus Styles */
.nav-link:focus,
.btn-back:focus,
.btn-complete:focus,
.btn-favorite:focus,
.btn-nav:focus,
.btn-star:focus,
.btn-heart:focus,
.btn-check:focus {
  outline: 2px solid #feca57;
  outline-offset: 2px;
}

/* Empty class styling */
.class-card[style*="not-allowed"] {
  background: rgba(255, 255, 255, 0.08);
  border: 1px dashed rgba(255, 255, 255, 0.3);
}

.class-card[style*="not-allowed"] h3 {
  color: rgba(255, 255, 255, 0.7);
}

.class-card[style*="not-allowed"] .stat-number {
  color: rgba(254, 202, 87, 0.7);
}

/* Auth specific styles */
.auth-input-field {
  @apply w-full px-4 py-3 rounded-lg bg-white border border-gray-200 focus:border-blue-500 focus:ring-1 focus:ring-blue-500 outline-none transition-all shadow-sm hover:shadow;
  font-size: clamp(0.9rem, 2.5vw, 1rem);
}

.auth-button {
  @apply w-full px-4 py-3 rounded-lg bg-blue-600 text-white font-semibold hover:bg-blue-700 transition-colors shadow-sm hover:shadow disabled:opacity-50 disabled:cursor-not-allowed;
  font-size: clamp(0.9rem, 2.5vw, 1rem);
}

/* Utility classes */
.text-primary {
  color: #3b82f6;
}

.text-secondary {
  color: #6b7280;
}

.bg-primary {
  background-color: #3b82f6;
}

.border-primary {
  border-color: #3b82f6;
}

.rounded-container {
  border-radius: 0.5rem;
}

.gap-section {
  gap: 2rem;
}

@media (max-width: 768px) {
  .gap-section {
    gap: 1.5rem;
  }
}

/* iPhone-Specific Enhancements */
@supports (-webkit-touch-callout: none) {
  /* iPhone detection and specific styles */
  .iphone-optimized {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000;
    perspective: 1000;
  }
  
  .iphone-optimized video {
    -webkit-playsinline: true !important;
    -webkit-presentation-mode: inline !important;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
  }
  
  /* Enhanced iPhone fullscreen button */
  .iphone-optimized #fullscreen-btn {
    background: rgba(255, 107, 53, 0.2) !important;
    border: 2px solid rgba(255, 107, 53, 0.5) !important;
    color: #ff6b35 !important;
    font-weight: bold;
  }
  
  .iphone-optimized #fullscreen-btn:hover,
  .iphone-optimized #fullscreen-btn:active {
    background: rgba(255, 107, 53, 0.8) !important;
    color: white !important;
    transform: scale(1.1);
  }
  
  /* Enhanced iPhone play/pause controls */
  .iphone-optimized #play-pause-btn {
    background: rgba(72, 202, 139, 0.2) !important;
    border: 2px solid rgba(72, 202, 139, 0.5) !important;
    width: 50px !important;
    height: 50px !important;
    min-width: 50px !important;
  }
  
  .iphone-optimized #play-pause-btn:hover,
  .iphone-optimized #play-pause-btn:active {
    background: rgba(72, 202, 139, 0.8) !important;
    transform: scale(1.15) !important;
  }
  
  /* Enhanced iPhone touch targets */
  .iphone-optimized .control-btn {
    min-width: 48px !important;
    height: 48px !important;
    font-size: 18px !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(255, 107, 53, 0.3);
  }
  
  /* iPhone-specific progress bar */
  .iphone-optimized .progress-bar {
    height: 12px !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  
  .iphone-optimized .progress-handle {
    width: 24px !important;
    height: 24px !important;
    opacity: 1 !important;
    background: #ff6b35 !important;
  }
  
  /* iPhone toast notifications */
  .iphone-optimized + * .toast {
    background: linear-gradient(45deg, #ff6b35, #feca57) !important;
    font-weight: 600;
    font-size: 16px;
  }
}

/* iPhone Media Query for Enhanced Support */
@media screen and (max-device-width: 480px) and (-webkit-min-device-pixel-ratio: 2) {
  /* iPhone-specific video controls */
  .video-wrapper {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
  }
  
  video {
    -webkit-playsinline: true !important;
    -webkit-presentation-mode: inline !important;
  }
  
  .custom-controls {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.7) 70%, transparent 100%) !important;
  }
  
  .control-btn {
    background: rgba(255, 255, 255, 0.15) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
  
  #fullscreen-btn {
    background: linear-gradient(45deg, #ff6b35, #feca57) !important;
    color: white !important;
    font-weight: bold;
    min-width: 50px !important;
    height: 50px !important;
  }
  
  #play-pause-btn {
    background: linear-gradient(45deg, #48ca8b, #56ab2f) !important;
    color: white !important;
    min-width: 50px !important;
    height: 50px !important;
  }
}