/**
 * =========================================
 * 贝谷TV - MDUI 2 / Material Design 3
 * =========================================
 * MDUI 2 颜色变量存储 RGB 通道值，需用 rgb() 包裹
 */

/* ---------- CSS Variables ---------- */
:root {
  --live-red: 239, 68, 68;
  --accent-cyan: 0, 212, 255;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: rgb(var(--mdui-color-surface));
  color: rgb(var(--mdui-color-on-surface));
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ---------- Background Atmosphere ---------- */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 400px;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgb(var(--mdui-color-primary)) 0%, transparent 60%);
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

/* ---------- Typography ---------- */
a {
  color: rgb(var(--mdui-color-primary));
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
a:hover { opacity: 0.8; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: rgb(var(--mdui-color-on-surface));
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(var(--mdui-color-on-surface-variant), 0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(var(--mdui-color-on-surface-variant), 0.5); }

::selection {
  background: rgb(var(--mdui-color-primary));
  color: rgb(var(--mdui-color-on-primary));
}

/* ---------- Main Content ---------- */
#main-wrapper {
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  min-height: 100vh;
}

#main {
  padding-top: 8px;
}

/* ---------- Top App Bar ---------- */
mdui-top-app-bar {
  background-color: rgb(var(--mdui-color-surface-container)) !important;
}

.appbar-live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: rgb(var(--live-red));
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(var(--live-red), 0.4); }
  50% { opacity: 0.8; transform: scale(1.1); box-shadow: 0 0 0 6px rgba(var(--live-red), 0); }
}

/* ---------- Navigation Drawer ---------- */
.tv-drawer {
  /* 小屏(mobile)下 host 宽度应为 100%,避免限制遮罩层覆盖范围;
     默认 display 不覆盖 MDUI 内部规则,避免默认展开 */
  width: 100%;
  max-width: 100%;
  background-color: rgb(var(--mdui-color-surface-container-low));
  --z-index: 2000;
  will-change: transform;
  --mdui-motion-duration-long2: 320ms;
  --mdui-motion-duration-short4: 280ms;
  --mdui-motion-duration-medium4: 360ms;
  --mdui-motion-easing-emphasized: cubic-bezier(0.32, 0.72, 0, 1);
}

/* 面板固定 300px 宽度,不再撑破 host */
.tv-drawer::part(panel) {
  width: 300px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* 遮罩层确保覆盖全屏 */
.tv-drawer::part(overlay) {
  position: fixed;
  inset: 0;
}

/* 移除 list-item active 的青绿色背景,改为中性表面色 */
.tv-drawer mdui-list-item[active] {
  background-color: rgb(var(--mdui-color-surface-container-highest)) !important;
  color: rgb(var(--mdui-color-on-surface)) !important;
}
.tv-drawer mdui-list-item[active]::part(headline),
.tv-drawer mdui-list-item[active]::part(icon),
.tv-drawer mdui-list-item[active]::part(end-icon) {
  color: rgb(var(--mdui-color-on-surface)) !important;
}

/* hover 同样使用中性表面色 */
.tv-drawer mdui-list-item:hover {
  background-color: rgb(var(--mdui-color-surface-container-high)) !important;
}

/* 大屏:抽屉常驻固定宽度 */
@media (min-width: 840px) {
  .tv-drawer {
    display: flex;
    flex-direction: column;
    width: 300px;
    max-width: 300px;
  }
  .tv-drawer::part(panel) {
    width: 300px;
  }
}

/* Header */
.drawer-header {
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.drawer-banner-wrap {
  position: relative;
  overflow: hidden;
}

.drawer-banner {
  height: 130px;
  width: 100%;
  object-fit: cover;
  display: block;
}

.drawer-banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom,
    transparent 0%,
    rgba(var(--mdui-color-surface-container-low), 0.3) 50%,
    rgb(var(--mdui-color-surface-container-low)) 100%);
}

.drawer-header-content {
  position: relative;
  margin-top: -36px;
  padding: 0 20px 12px;
  display: flex;
  align-items: flex-end;
  gap: 12px;
}

.drawer-avatar {
  width: 60px;
  height: 60px;
  border: none;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.drawer-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: rgb(var(--mdui-color-on-surface));
  padding-bottom: 4px;
}

.drawer-sub {
  font-size: 0.78rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  display: flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
}

.drawer-live-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: rgb(var(--live-red));
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

/* Stats Card */
.drawer-stats {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin: 8px 16px 4px;
  padding: 12px 8px;
  background: rgb(var(--mdui-color-surface-container));
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.drawer-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.drawer-stat-num {
  font-size: 1.3rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-primary));
  font-family: var(--font-sans);
  line-height: 1.2;
}

.drawer-stat-live {
  font-size: 0.75rem;
  font-weight: 800;
  color: rgb(var(--live-red));
  letter-spacing: 1px;
  line-height: 1.2;
  padding: 2px 0;
}

.drawer-stat-label {
  font-size: 0.68rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.drawer-stat-divider {
  width: 1px;
  height: 28px;
  background: rgb(var(--mdui-color-surface-variant));
}

/* Section Title */
.drawer-section-title {
  padding: 14px 24px 6px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgb(var(--mdui-color-on-surface-variant));
  flex-shrink: 0;
}

/* Nav List */
.drawer-nav-list {
  flex-shrink: 0;
}

/* Footer */
.drawer-footer {
  margin-top: auto;
  padding: 16px 24px 20px;
  flex-shrink: 0;
}

.drawer-copyright {
  font-size: 0.72rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  margin-bottom: 2px;
}

/* ---------- Live Status Bar ---------- */
.live-status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.live-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(var(--live-red), 0.12);
  border: 1px solid rgba(var(--live-red), 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgb(var(--live-red));
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---------- Channel Grid ---------- */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.channel-card {
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-base), filter var(--transition-base);
  text-decoration: none;
  display: block;
  position: relative;
}
.channel-card:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.channel-card-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
}

.channel-logo-wrap {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  position: relative;
}

.channel-logo {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: rgb(var(--mdui-color-surface-container-high));
  padding: 4px;
  transition: transform var(--transition-base);
}
.channel-card:hover .channel-logo { transform: scale(1.05); }

.channel-logo-fallback {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgb(var(--mdui-color-primary-container));
  color: rgb(var(--mdui-color-on-primary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
}

.channel-info { flex: 1; min-width: 0; }

.channel-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-meta {
  font-size: 0.75rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  display: flex;
  align-items: center;
  gap: 8px;
}

.channel-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: rgba(var(--live-red), 0.15);
  border-radius: 100px;
  font-size: 0.65rem;
  font-weight: 600;
  color: rgb(var(--live-red));
  text-transform: uppercase;
}

.channel-card-footer {
  padding: 8px 18px;
  border-top: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.channel-tag {
  font-size: 0.7rem;
  padding: 3px 10px;
  background: rgb(var(--mdui-color-secondary-container));
  color: rgb(var(--mdui-color-on-secondary-container));
  border-radius: 100px;
  font-weight: 500;
}

/* ---------- Player Page ---------- */
.player-container {
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 24px;
}

.player-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: none;
  gap: 16px;
  flex-wrap: wrap;
}

.player-channel-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.player-logo-wrap {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  position: relative;
}

.player-channel-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: rgb(var(--mdui-color-surface-container-high));
  padding: 4px;
}

.player-logo-fallback {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgb(var(--mdui-color-primary-container));
  color: rgb(var(--mdui-color-on-primary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
}

.player-channel-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-on-surface));
}
.player-channel-id {
  font-size: 0.75rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-family: var(--font-mono);
}

.player-controls-top {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Video.js Override */
.video-js {
  width: 100%;
  background: #000;
}
.video-js .vjs-control-bar {
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 100%);
}
.video-js .vjs-big-play-button {
  background: rgb(var(--mdui-color-primary));
  border: none;
  border-radius: 50%;
  width: 72px;
  height: 72px;
  line-height: 72px;
  font-size: 36px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  transition: transform var(--transition-base);
}
.video-js:hover .vjs-big-play-button {
  transform: translate(-50%, -50%) scale(1.1);
}
.video-js .vjs-big-play-button .vjs-icon-placeholder::before {
  line-height: 72px;
  font-size: 36px;
}
.video-js .vjs-play-progress,
.video-js .vjs-volume-level {
  background: rgb(var(--mdui-color-primary));
}

/* No source hint */
.no-source-hint {
  padding: 60px 20px;
  text-align: center;
  background: rgb(var(--mdui-color-surface-container-low));
}
.no-source-hint p {
  margin: 16px 0;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 1.1rem;
}

/* ---------- Stream Switcher ---------- */
.stream-switcher-wrap {
  padding: 12px 22px 0;
}

.stream-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stream-switcher-select {
  background: rgb(var(--mdui-color-surface-container-high));
  border: none;
  border-radius: var(--radius-sm);
  color: rgb(var(--mdui-color-on-surface));
  padding: 8px 32px 8px 12px;
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.stream-switcher-select:hover,
.stream-switcher-select:focus {
  background: rgb(var(--mdui-color-surface-container-highest));
  outline: none;
}

/* ---------- Article Tags ---------- */
.article-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  flex-wrap: wrap;
}

.article-tag-link {
  font-size: 0.75rem;
  padding: 4px 12px;
  background: rgb(var(--mdui-color-secondary-container));
  color: rgb(var(--mdui-color-on-secondary-container));
  border-radius: 100px;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.article-tag-link:hover { opacity: 0.8; }

/* ---------- Article Content ---------- */
.article-content {
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.article-content-body {
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---------- Paginator ---------- */
.paginator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgb(var(--mdui-color-surface-variant));
}

.paginator-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-sm);
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.paginator-btn:hover {
  background: rgb(var(--mdui-color-primary-container));
  color: rgb(var(--mdui-color-on-primary-container));
}
.paginator-btn.current {
  background: rgb(var(--mdui-color-primary));
  color: rgb(var(--mdui-color-on-primary));
  font-weight: 700;
}

/* ---------- Post Nav ---------- */
.post-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.post-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-md);
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition-fast);
  flex: 1;
  min-width: 0;
  max-width: 48%;
}
.post-nav-link:hover {
  border-color: rgb(var(--mdui-color-primary));
  background: rgb(var(--mdui-color-primary-container));
}
.post-nav-link.next { justify-content: flex-end; }
.post-nav-link .nav-label { font-size: 0.7rem; color: rgb(var(--mdui-color-on-surface-variant)); text-transform: uppercase; }
.post-nav-link .nav-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- Search Dialog ---------- */
mdui-dialog.search-dialog {
  max-width: 600px;
  width: 92vw;
}

.search-dialog-body {
  display: flex;
  flex-direction: column;
  max-height: 80vh;
  overflow: hidden;
}

.search-dialog-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 4px 12px;
  border-bottom: 1px solid rgb(var(--mdui-color-surface-variant));
  margin-bottom: 8px;
}

.search-header-icon {
  font-size: 22px;
  color: rgb(var(--mdui-color-on-surface-variant));
  flex-shrink: 0;
  margin-left: 4px;
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: rgb(var(--mdui-color-on-surface));
  font-size: 1rem;
  font-family: var(--font-sans);
  padding: 8px 4px;
  min-width: 0;
}
.search-input::placeholder {
  color: rgb(var(--mdui-color-on-surface-variant));
  opacity: 0.7;
}

.search-close-btn {
  flex-shrink: 0;
}

.search-result-list {
  max-height: 50vh;
  overflow-y: auto;
  flex: 1;
}

.search-hint {
  text-align: center;
  padding: 40px 16px;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: rgb(var(--mdui-color-on-surface));
  text-decoration: none;
  transition: background var(--transition-fast);
  font-size: 0.9rem;
  cursor: pointer;
}
.search-result-item:hover,
.search-result-item.search-result-active {
  background: rgb(var(--mdui-color-surface-container-high));
}

.search-result-icon {
  font-size: 20px;
  color: rgb(var(--mdui-color-primary));
  flex-shrink: 0;
}

.search-result-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-cat {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: rgb(var(--mdui-color-secondary-container));
  color: rgb(var(--mdui-color-on-secondary-container));
  border-radius: 100px;
  flex-shrink: 0;
  font-weight: 500;
}

.search-result-arrow {
  font-size: 16px;
  color: rgb(var(--mdui-color-on-surface-variant));
  opacity: 0;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}
.search-result-item:hover .search-result-arrow,
.search-result-item.search-result-active .search-result-arrow {
  opacity: 0.7;
}

.search-highlight {
  background: rgba(var(--mdui-color-primary), 0.15);
  color: rgb(var(--mdui-color-primary));
  border-radius: 2px;
  padding: 0 2px;
  font-weight: 600;
}

.search-dialog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 4px 0;
  border-top: 1px solid rgb(var(--mdui-color-surface-variant));
  margin-top: 8px;
  font-size: 0.75rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.search-shortcut-hint {
  opacity: 0.6;
  font-size: 0.7rem;
}

@media (max-width: 600px) {
  mdui-dialog.search-dialog {
    width: 100vw;
    max-width: 100vw;
  }
  .search-dialog-body {
    max-height: 90vh;
  }
  .search-result-list {
    max-height: 60vh;
  }
  .search-shortcut-hint {
    display: none;
  }
}

/* ---------- Footer ---------- */
#footer {
  background: rgb(var(--mdui-color-surface-container));
  border-top: none;
  padding: 28px 24px;
  margin-top: auto;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.footer-sns {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-sns a {
  color: rgb(var(--mdui-color-on-surface-variant));
  transition: color var(--transition-fast);
}
.footer-sns a:hover {
  color: rgb(var(--mdui-color-primary));
}

/* ---------- FAB ---------- */
.gotop-fab {
  position: fixed;
  --mdui-color-primary: var(--mdui-color-secondary);
  z-index: 9999;
}

/* ---------- Notice Banner ---------- */
.notice-banner {
  background: rgb(var(--mdui-color-primary-container));
  border: 1px solid rgb(var(--mdui-color-primary));
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: rgb(var(--mdui-color-on-primary-container));
}

/* ---------- About Page ---------- */
.about-container, .feedback-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px;
}

.about-header, .feedback-header {
  text-align: center;
  margin-bottom: 32px;
}

.about-logo, .feedback-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  background: rgb(var(--mdui-color-primary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.about-title, .feedback-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 8px;
}

.about-subtitle, .feedback-subtitle {
  font-size: 0.9rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

/* About Stats */
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.about-stat-item {
  text-align: center;
  padding: 16px 8px;
  background: rgb(var(--mdui-color-surface-container));
  border-radius: var(--radius-md);
}

.about-stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-primary));
}

.about-stat-label {
  font-size: 0.75rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  margin-top: 4px;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.about-card {
  padding: 22px;
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}
.about-card:hover {
  transform: translateY(-2px);
}

.about-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgb(var(--mdui-color-primary-container));
  color: rgb(var(--mdui-color-on-primary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.about-card-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.about-card-content p {
  font-size: 0.82rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  line-height: 1.5;
}

.about-info {
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 22px;
}

.about-info-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgb(var(--mdui-color-surface-variant));
}
.about-info-item:last-child { border-bottom: none; }

.about-info-label {
  font-size: 0.85rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.about-info-value {
  font-size: 0.85rem;
  color: rgb(var(--mdui-color-on-surface));
}

/* ---------- Feedback Page ---------- */
.feedback-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.feedback-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-base);
}
.feedback-card:hover {
  transform: translateY(-2px);
}

.feedback-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgb(var(--mdui-color-primary-container));
  color: rgb(var(--mdui-color-on-primary-container));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feedback-card-content { flex: 1; }
.feedback-card-content h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.feedback-card-content p { font-size: 0.82rem; color: rgb(var(--mdui-color-on-surface-variant)); }

.feedback-tips {
  background: rgb(var(--mdui-color-surface-container));
  border: none;
  border-radius: var(--radius-md);
  padding: 22px;
}

.feedback-tips h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.feedback-tips ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feedback-tips li {
  font-size: 0.85rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  padding-left: 20px;
  position: relative;
}

.feedback-tips li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgb(var(--mdui-color-primary));
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.fadeIn { animation: fadeIn 0.3s ease-out forwards; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.channel-card:nth-child(1) { animation: fadeInUp 0.35s ease-out 0.03s both; }
.channel-card:nth-child(2) { animation: fadeInUp 0.35s ease-out 0.06s both; }
.channel-card:nth-child(3) { animation: fadeInUp 0.35s ease-out 0.09s both; }
.channel-card:nth-child(4) { animation: fadeInUp 0.35s ease-out 0.12s both; }
.channel-card:nth-child(5) { animation: fadeInUp 0.35s ease-out 0.15s both; }
.channel-card:nth-child(6) { animation: fadeInUp 0.35s ease-out 0.18s both; }
.channel-card:nth-child(n+7) { animation: fadeInUp 0.35s ease-out 0.21s both; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  #main-wrapper { padding: 16px; }
  .channel-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
  .channel-card-inner { gap: 10px; padding: 12px 14px; }
  .channel-logo-wrap, .channel-logo, .channel-logo-fallback { width: 44px; height: 44px; }
  .channel-title { font-size: 0.85rem; }
  .player-header { padding: 14px 16px; }
  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .about-cards { grid-template-columns: 1fr; }
}