/* ===========================
   1. CSS Variables & Reset
   2. Typography
   3. Layout (Header, Sidebar, Main)
   4. Components (Cards, Buttons, Badges)
   5. Pages (Player, Category, Channel, Search)
   6. Utilities (Skeleton, Toast, Modal)
   7. Theme (Dark/Light)
   8. Responsive (Mobile First)
   9. Animations
   10. Print & Accessibility
   =========================== */

/* ==========================================================
   1. CSS Variables & Reset
   ========================================================== */

/* --- Dark Theme (Default) --- */
:root,
[data-theme="dark"] {
  /* Colors */
  --primary: #ff0000;
  --bg-main: #0f0f0f;
  --bg-secondary: #272727;
  --bg-card: #1a1a1a;
  --bg-hover: #3a3a3a;
  --text-primary: #f1f1f1;
  --text-secondary: #aaaaaa;
  --border-color: #303030;
  --search-bg: var(--bg-main);
  --player-bg: #000;
  --badge-text: #fff;

  /* Layout */
  --sidebar-width: 240px;
  --header-height: 56px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-card: 0 1px 6px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.5);
}

/* --- Light Theme --- */
[data-theme="light"] {
  --primary: #cc0000;
  --bg-main: #f9f9f9;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-hover: #e5e5e5;
  --text-primary: #0f0f0f;
  --text-secondary: #606060;
  --border-color: #e0e0e0;
  --search-bg: #f0f0f0;
  --player-bg: #000;
  --badge-text: #fff;
  --shadow-card: 0 1px 6px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html,
body {
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: 'Segoe UI', Tahoma, 'Noto Sans Arabic', 'Noto Kufi Arabic', Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  direction: rtl;
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: #888;
}

* {
  scrollbar-width: thin;
  scrollbar-color: #555 var(--bg-main);
}

/* ==========================================================
   2. Typography
   ========================================================== */

.page-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

/* ==========================================================
   3. Layout (Header, Sidebar, Main)
   ========================================================== */

/* --- Header --- */
.app-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.5px;
}

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

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-hover);
}

.header-search {
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 600px;
  margin: 0 40px;
}

.search-form {
  display: flex;
  width: 100%;
}

.search-input {
  flex: 1;
  height: 40px;
  padding: 0 16px;
  background: var(--search-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  direction: rtl;
  transition: background var(--transition-normal), border-color var(--transition-fast);
}

.search-input:focus {
  border-color: #3ea6ff;
}

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

.search-btn {
  width: 64px;
  height: 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: background var(--transition-fast);
}

.search-btn:hover {
  background: var(--bg-hover);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.header-icon:hover {
  background: var(--bg-hover);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-normal);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  transform: rotate(30deg);
}

/* --- Sidebar --- */
.app-sidebar {
  position: fixed;
  top: var(--header-height);
  right: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--bg-secondary);
  overflow-y: auto;
  padding: 12px 0;
  z-index: 900;
  border-left: 1px solid var(--border-color);
  transition: transform var(--transition-normal), width var(--transition-normal), background var(--transition-normal);
}

.app-sidebar.collapsed {
  transform: translateX(100%);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 24px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: background var(--transition-fast);
}

.sidebar-link:hover {
  background: var(--bg-hover);
}

.sidebar-link.active {
  background: var(--bg-hover);
  font-weight: 600;
}

.sidebar-link .icon {
  width: 24px;
  text-align: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.sidebar-divider {
  height: 1px;
  background: var(--border-color);
  margin: 12px 0;
}

.sidebar-title {
  padding: 8px 24px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 899;
}

.sidebar-overlay.active {
  display: block;
}

/* --- Main Content --- */
.app-main {
  margin-top: var(--header-height);
  margin-right: var(--sidebar-width);
  padding: 24px;
  min-height: calc(100vh - var(--header-height));
  transition: margin-right var(--transition-normal);
}

.app-main.expanded {
  margin-right: 0;
}

/* --- Footer --- */
.app-footer {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  margin-top: 48px;
}

/* ==========================================================
   4. Components (Cards, Buttons, Badges)
   ========================================================== */

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

/* --- Video Card --- */
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-normal);
}

.video-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

.thumbnail-wrapper {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--player-bg);
}

.thumbnail-wrapper img {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

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

.thumbnail-duration {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

/* --- Platform Badges --- */
.platform-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--badge-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  backdrop-filter: blur(4px);
}

.badge-youtube {
  background: rgba(255, 0, 0, 0.9);
}

.badge-tiktok {
  background: rgba(0, 0, 0, 0.85);
  border: 1px solid #fff;
}

.badge-facebook {
  background: rgba(24, 119, 242, 0.9);
}

.badge-instagram {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
}

.badge-vimeo {
  background: rgba(26, 182, 235, 0.9);
}

.badge-telegram {
  background: rgba(0, 136, 204, 0.9);
}

.badge-gdrive {
  background: rgba(52, 168, 83, 0.9);
}

.badge-direct {
  background: rgba(128, 128, 128, 0.9);
}

/* --- Video Info --- */
.video-info {
  padding: 10px 12px 12px;
}

.video-title {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.video-channel {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.video-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --- Action Buttons --- */
.btn-action {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.btn-action:hover {
  background: var(--bg-hover);
}

/* --- Load More Button --- */
.load-more-wrapper {
  text-align: center;
  padding: 32px 0;
}

.btn-load-more {
  padding: 10px 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.btn-load-more:hover {
  background: var(--bg-hover);
}

.btn-load-more:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Copy Button --- */
.btn-copy {
  padding: 8px 16px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: opacity var(--transition-fast);
}

.btn-copy:hover {
  opacity: 0.9;
}

/* ==========================================================
   5. Pages (Player, Category, Channel, Search)
   ========================================================== */

/* --- Player Page --- */
.player-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.video-player-wrapper {
  position: relative;
  padding-top: 56.25%;
  background: var(--player-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.video-player-wrapper iframe,
.video-player-wrapper video {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
}

.video-details {
  padding: 12px 0;
}

.video-details-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}

.video-details-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.video-views {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.video-actions {
  display: flex;
  gap: 8px;
}

.channel-info-section {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
}

.channel-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-secondary);
}

.channel-name {
  font-size: 1rem;
  font-weight: 600;
}

.channel-subscribers {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.video-description {
  padding: 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-wrap;
  margin-top: 14px;
  transition: background var(--transition-normal);
}

/* --- Sidebar Videos (Related) --- */
.sidebar-videos {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-video-card {
  display: flex;
  gap: 10px;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.sidebar-video-card:hover {
  background: var(--bg-hover);
}

.sidebar-thumbnail {
  position: relative;
  width: 168px;
  min-width: 168px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--player-bg);
}

.sidebar-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-video-info {
  flex: 1;
  padding: 2px 0;
}

.sidebar-video-title {
  font-size: 0.83rem;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

.sidebar-video-channel {
  font-size: 0.73rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.sidebar-video-meta {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* --- Category Page --- */
.category-header {
  margin-bottom: 24px;
}

.category-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

/* --- Search Page --- */
.search-results-info {
  margin-bottom: 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* --- Channel Page --- */
.channel-header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  transition: background var(--transition-normal);
}

.channel-header-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-hover);
}

.channel-header-info h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.channel-header-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 64px 16px;
  color: var(--text-secondary);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 1rem;
}

/* ==========================================================
   6. Utilities (Skeleton, Toast, Modal)
   ========================================================== */

/* --- Loading Skeleton --- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-hover) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-thumb {
  padding-top: 56.25%;
}

.skeleton-text {
  height: 14px;
  margin: 8px 12px;
  width: 80%;
}

.skeleton-text-sm {
  height: 10px;
  margin: 4px 12px 12px;
  width: 60%;
}

.skeleton-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  z-index: 3000;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-normal);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* --- Share Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 480px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.modal-close {
  float: left;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
}

.share-link-box {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.share-link-input {
  flex: 1;
  padding: 8px 12px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  direction: ltr;
  text-align: left;
}

/* --- Mobile Search --- */
.mobile-search {
  display: none;
  padding: 8px 16px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

/* ==========================================================
   7. Theme (Dark/Light)
   ========================================================== */

/* Theme styles are defined in Section 1 via CSS variables.
   Toggle between themes by setting data-theme="dark" or
   data-theme="light" on the root element. */

/* ==========================================================
   8. Responsive (Mobile First)
   ========================================================== */

/* --- Video Grid Breakpoints --- */
@media (min-width: 500px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}

@media (min-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

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

@media (min-width: 1280px) {
  .video-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* --- Player Container --- */
@media (min-width: 1024px) {
  .player-container {
    grid-template-columns: 1fr 380px;
    gap: 24px;
  }
}

/* --- Tablet: 768px and below --- */
@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(100%);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .app-main {
    margin-right: 0;
    padding: 16px;
  }

  .header-search {
    margin: 0 12px;
    max-width: 400px;
  }

  .sidebar-video-card {
    flex-direction: column;
  }

  .sidebar-thumbnail {
    width: 100%;
    min-width: 100%;
  }

  .channel-header {
    flex-direction: column;
    text-align: center;
  }

  .video-details-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .video-details-title {
    font-size: 1.05rem;
  }

  .player-container {
    gap: 16px;
  }

  .video-grid {
    gap: 12px;
  }
}

/* --- Mobile: 600px and below --- */
@media (max-width: 600px) {
  :root {
    --header-height: 52px;
  }

  .app-header {
    padding: 0 10px;
    height: 52px;
  }

  .header-logo {
    font-size: 1.1rem;
  }

  .menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }

  .header-search {
    margin: 0 8px;
    max-width: none;
  }

  .search-input {
    height: 36px;
    font-size: 0.85rem;
    padding: 0 12px;
  }

  .search-btn {
    width: 52px;
    height: 36px;
    font-size: 0.95rem;
  }

  .header-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }

  .app-main {
    padding: 12px;
  }

  .video-grid {
    gap: 10px;
  }

  .video-info {
    padding: 8px 10px 10px;
  }

  .video-title {
    font-size: 0.82rem;
  }

  .video-channel {
    font-size: 0.73rem;
  }

  .video-meta {
    font-size: 0.7rem;
  }

  .video-card:hover {
    transform: none;
  }

  .section-header h2 {
    font-size: 1rem;
  }

  .category-header h1 {
    font-size: 1.2rem;
  }

  .channel-header {
    padding: 16px;
  }

  .channel-header-avatar {
    width: 72px;
    height: 72px;
  }

  .channel-header-info h1 {
    font-size: 1.2rem;
  }

  .video-details-title {
    font-size: 1rem;
  }

  .btn-action {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .sidebar-video-title {
    font-size: 0.78rem;
  }

  .sidebar-video-channel,
  .sidebar-video-meta {
    font-size: 0.68rem;
  }

  .video-description {
    padding: 12px;
    font-size: 0.83rem;
  }

  .load-more-wrapper {
    padding: 24px 0;
  }

  .btn-load-more {
    padding: 8px 24px;
    font-size: 0.85rem;
  }

  .empty-state {
    padding: 48px 16px;
  }

  .empty-state .icon {
    font-size: 2.5rem;
  }

  .app-footer {
    padding: 24px 12px;
    font-size: 0.75rem;
  }
}

/* --- Small Phones: 400px and below --- */
@media (max-width: 400px) {
  .header-logo {
    font-size: 1rem;
    letter-spacing: -1px;
  }

  .header-search {
    display: none;
  }

  .header-actions {
    gap: 0;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .sidebar-thumbnail {
    width: 140px;
    min-width: 140px;
  }
}

/* --- Mobile Search (below header on small screens) --- */
@media (max-width: 480px) {
  .mobile-search {
    display: block;
    margin-top: var(--header-height);
  }
}

/* --- Touch-Friendly Tap Targets --- */
@media (hover: none) and (pointer: coarse) {
  .sidebar-link {
    padding: 12px 24px;
  }

  .btn-action {
    padding: 10px 18px;
    min-height: 44px;
  }

  .btn-load-more {
    padding: 12px 32px;
    min-height: 44px;
  }

  .theme-toggle,
  .header-icon,
  .menu-toggle {
    min-width: 44px;
    min-height: 44px;
  }
}

/* --- Landscape Phones --- */
@media (max-height: 500px) and (orientation: landscape) {
  :root {
    --header-height: 48px;
  }

  .app-header {
    height: 48px;
  }

  .app-main {
    padding: 8px 12px;
  }
}

/* --- Safe Area for Notched Phones --- */
@supports (padding: env(safe-area-inset-bottom)) {
  .app-footer {
    padding-bottom: calc(32px + env(safe-area-inset-bottom));
  }
}

/* ==========================================================
   9. Animations
   ========================================================== */

@keyframes skeleton-pulse {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ==========================================================
   10. Print & Accessibility
   ========================================================== */

/* --- Focus Visible (Accessibility) --- */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Remove default focus outline for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* --- 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;
  }

  .video-card:hover {
    transform: none;
  }

  .theme-toggle:hover {
    transform: none;
  }
}

/* --- Print Styles --- */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .app-header,
  .app-sidebar,
  .sidebar-overlay,
  .theme-toggle,
  .menu-toggle,
  .search-btn,
  .header-actions,
  .mobile-search,
  .toast,
  .modal-overlay,
  .btn-action,
  .btn-load-more,
  .btn-copy,
  .app-footer {
    display: none !important;
  }

  .app-main {
    margin: 0 !important;
    padding: 0 !important;
  }

  a,
  a:visited {
    text-decoration: underline;
    color: #000 !important;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    font-weight: normal;
  }

  img {
    max-width: 100% !important;
  }

  .video-card {
    break-inside: avoid;
    border: 1px solid #ccc;
    margin-bottom: 16px;
  }

  .video-grid {
    display: block;
  }

  .video-grid .video-card {
    margin-bottom: 16px;
  }

  .player-container {
    display: block;
  }

  .channel-header {
    border: 1px solid #ccc;
  }

  .video-description {
    white-space: pre-wrap;
  }
}

/* --- High Contrast Mode --- */
@media (forced-colors: active) {
  .sidebar-link.active {
    border-right: 3px solid LinkText;
  }

  .video-card {
    border: 1px solid CanvasText;
  }

  .btn-action,
  .btn-load-more,
  .btn-copy {
    border: 1px solid CanvasText;
  }
}

/* --- Screen Reader Only (Utility) --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Search Autocomplete --- */
.search-suggest {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  left: 0;
  background: var(--bg-card, #1f1f1f);
  border: 1px solid var(--border-color, #333);
  border-radius: 8px;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  max-height: 320px;
  overflow-y: auto;
}
.search-suggest-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-primary, #fff);
}
.search-suggest-item:hover {
  background: var(--bg-hover, #333);
}
.search-suggest-item img {
  width: 64px;
  height: 36px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}
.search-suggest-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}