:root {
  --bg: #0f0f0f;
  --bg-2: #212121;
  --bg-3: #272727;
  --bg-hover: #3f3f3f;
  --border: #303030;
  --text: #f1f1f1;
  --text-2: #aaa;
  --text-3: #717171;
  --accent: #2962ff;
  --link: #3ea6ff;
  --chip-bg: #272727;
  --chip-active-bg: #f1f1f1;
  --chip-active-text: #0f0f0f;
  --topbar-h: 56px;
  --sidebar-w: 240px;
  --sidebar-mini-w: 72px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "Roboto", "Noto Sans TC", "PingFang TC", -apple-system, "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}
button { font-family: inherit; }
a { color: inherit; text-decoration: none; }
a.link { color: var(--link); }

/* ==================== Topbar ==================== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  z-index: 60;
  display: flex;
  align-items: center;
  padding: 0 16px;
  background: var(--bg);
}
.tb-left, .tb-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.tb-center {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 0 40px;
}

.icon-btn {
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text);
  border-radius: 50%;
  cursor: pointer;
  position: relative;
}
.icon-btn:hover { background: var(--bg-hover); }
.icon-btn svg { width: 24px; height: 24px; fill: currentColor; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 14px 0 4px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  cursor: pointer;
  color: var(--accent);
}
.brand .logo {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 28px; height: 20px;
  background: linear-gradient(135deg, #2962ff, #3ea6ff);
  border-radius: 6px;
  color: white;
  box-shadow: 0 6px 18px rgba(41, 98, 255, 0.28);
}
.brand .logo svg { width: 14px; height: 14px; fill: white; }

.search { display: flex; width: 100%; max-width: 640px; align-items: center; }
.search-input-wrap {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  background: #121212;
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 40px 0 0 40px;
  padding: 0 4px 0 16px;
  height: 40px;
}
.search-input-wrap:focus-within {
  border-color: #1c62b9;
  box-shadow: inset 0 0 0 1px #1c62b9;
}
.search-input-wrap input {
  flex: 1;
  height: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 16px;
}
.search-btn {
  width: 64px;
  height: 40px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 0 40px 40px 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center; justify-content: center;
}
.search-btn:hover { background: var(--bg-hover); }
.search-btn svg { width: 24px; height: 24px; fill: currentColor; }
.mic-btn { margin-left: 8px; background: var(--bg-3); }

.suggest {
  position: absolute;
  top: calc(100% + 8px);
  left: -1px; right: -65px;
  background: #212121;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.5);
  max-height: 400px;
  overflow-y: auto;
  z-index: 100;
}
.suggest-item {
  padding: 8px 16px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.suggest-item:hover, .suggest-item.active { background: var(--bg-3); }
.suggest-item svg { width: 16px; height: 16px; fill: var(--text-2); flex-shrink: 0; }

.my-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--avatar-color, #2962ff), color-mix(in srgb, var(--avatar-color, #2962ff) 70%, #7db2ff));
  color: white;
  display: inline-flex;
  align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 14px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08);
}
.my-avatar.has-image {
  background: var(--bg-3);
}
.my-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.mobile-nav,
.mobile-search-sheet { display: none; }

/* ==================== Sidebar ==================== */
.sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg);
  overflow-y: auto;
  padding: 12px 0;
  z-index: 50;
}
.sidebar::-webkit-scrollbar { width: 8px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 4px; }

.sb-section {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}
.sb-section:last-child { border-bottom: none; }
.sb-section:empty { display: none; }
.sb-title {
  font-size: 16px;
  padding: 8px 12px;
  color: var(--text);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
}
.chevron { color: var(--text-2); margin-left: auto; }
.sb-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 12px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
}
.sb-item:hover { background: var(--bg-3); }
.sb-item.active { background: var(--bg-3); font-weight: 500; }
.sb-item svg { width: 24px; height: 24px; fill: currentColor; flex-shrink: 0; }
.sb-item .sb-flag { font-size: 20px; width: 24px; flex-shrink: 0; text-align: center; }

.sb-channel-avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-3);
  flex-shrink: 0;
  overflow: hidden;
}
.sb-channel-avatar img { width: 100%; height: 100%; object-fit: cover; }

.sb-footer {
  font-size: 12px;
  color: var(--text-2);
  padding: 16px 12px;
  line-height: 1.5;
}
.sb-footer a { color: var(--link); }

/* mini sidebar */
.app.mini .sidebar { width: var(--sidebar-mini-w); }
.app.mini .sidebar .sb-section { border: none; padding: 0; }
.app.mini .sidebar .sb-title,
.app.mini .sidebar .sb-footer { display: none; }
.app.mini .sidebar .sb-item {
  flex-direction: column;
  gap: 6px;
  height: 74px;
  padding: 14px 0 0;
  font-size: 10px;
  border-radius: 12px;
  margin: 0 4px;
}
.app.mini .sidebar .sb-section:nth-child(n+3) { display: none; }

/* ==================== Content ==================== */
.content {
  margin-left: var(--sidebar-w);
  margin-top: var(--topbar-h);
  min-height: calc(100vh - var(--topbar-h));
  transition: margin-left 0.15s;
}
.app.mini .content { margin-left: var(--sidebar-mini-w); }

.chipbar {
  position: sticky;
  top: var(--topbar-h);
  z-index: 40;
  background: var(--bg);
  padding: 12px 24px;
  display: flex;
  gap: 12px;
  white-space: nowrap;
}
.subs-strip {
  position: sticky;
  top: calc(var(--topbar-h) + 56px);
  z-index: 39;
  background: var(--bg);
  padding: 8px 24px 12px;
  display: flex;
  gap: 12px;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.subs-track {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex: 1;
  min-width: 0;
}
.subs-track::-webkit-scrollbar { display: none; }
.subs-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 0;
}
.subs-pill:hover { background: var(--bg-hover); }
.subs-pill.active { border-color: var(--text); background: var(--chip-bg); }
.subs-pill-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.subs-pill-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.subs-pill-name {
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.subs-scroll {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--bg-2);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.subs-scroll:hover { background: var(--bg-hover); }
.subs-scroll svg { width: 20px; height: 20px; fill: currentColor; }
.chip {
  background: var(--chip-bg);
  border: 1px solid transparent;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.chip:hover { background: var(--bg-hover); }
.chip.active { background: var(--chip-active-bg); color: var(--chip-active-text); }

/* ==================== Video grid ==================== */
.grid-wrap { padding: 16px 24px 40px; }

.section-title {
  font-size: 24px;
  font-weight: 700;
  margin: 16px 0 24px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title .count {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-2);
}

.section-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 24px 16px;
}
.grid.shorts {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
.grid.shorts .thumb { aspect-ratio: 9 / 16; }

.card { cursor: pointer; position: relative; }
.card:hover .title { color: white; }
/* 卡片右上角三點按鈕 */
.card-action-more {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 10;
  background: rgba(0,0,0,0.72);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  color: white;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .15s;
  pointer-events: none;
}
.card:hover .card-action-more { opacity: 1; pointer-events: auto; }
.card-action-more:hover { background: rgba(0,0,0,0.9); }
.card-action-more svg { width: 18px; height: 18px; fill: currentColor; }

.thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-2);
  border-radius: 12px;
}
.thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 12px;
  transition: transform 0.2s;
}
.card:hover .thumb img { transform: scale(1.02); }
.thumb .duration, .thumb .live {
  position: absolute;
  right: 6px; bottom: 6px;
  background: rgba(0,0,0,0.85);
  color: white;
  padding: 3px 5px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
}
.thumb .live { background: var(--accent); }
.thumb .progress {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(255,255,255,0.3);
}
.thumb .progress::before {
  content: '';
  display: block;
  height: 100%;
  background: var(--accent);
  width: var(--p, 0%);
}

.meta {
  display: flex;
  gap: 12px;
  padding: 12px 0 0;
}
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-3);
  flex-shrink: 0;
  overflow: hidden;
  cursor: pointer;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

.info { flex: 1; min-width: 0; }
.title {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
  color: var(--text);
}
.sub { font-size: 12px; color: var(--text-2); line-height: 1.4; }
.sub .channel { display: block; cursor: pointer; }
.sub .channel:hover { color: var(--text); }
.sub .stats { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.sub .dot { width: 2px; height: 2px; background: currentColor; border-radius: 50%; display: inline-block; margin: 0 4px; }

.loader, .empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: var(--text-2);
  font-size: 14px;
}
.empty .empty-icon { margin: 0 auto 16px; }
.empty .empty-icon svg { width: 60px; height: 60px; color: var(--text-2); display: block; margin: 0 auto; }
.empty .empty-title { font-size: 18px; color: var(--text); font-weight: 500; margin-bottom: 8px; }
.empty .empty-hint {
  color: var(--text-2);
  line-height: 1.6;
}
.empty .empty-action {
  margin-top: 16px;
  justify-content: center;
  line-height: 1;
  vertical-align: middle;
}

/* ==================== Watch page ==================== */
.watch {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 402px;
  gap: 24px;
  padding: 24px;
  max-width: 1800px;
  margin: 0 auto;
}
.watch-main { min-width: 0; }
.player {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: black;
  border-radius: 12px;
  overflow: hidden;
}
.player iframe { width: 100%; height: 100%; border: none; }

.watch-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin: 16px 0 12px;
}

.watch-channel {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  flex-wrap: wrap;
}
.watch-channel .avatar { width: 40px; height: 40px; }
.watch-channel .ch-info { flex: 1; min-width: 0; }
.watch-channel .ch-name { font-size: 16px; font-weight: 500; cursor: pointer; }
.watch-channel .ch-name:hover { color: white; }
.watch-channel .ch-subs { font-size: 12px; color: var(--text-2); }
.subscribe-btn {
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 0 16px;
  height: 36px;
  border-radius: 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.subscribe-btn:hover { background: var(--text-2); }
.subscribe-btn.subscribed {
  background: var(--bg-3);
  color: var(--text);
}

.action-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.action-pill {
  background: var(--bg-3);
  color: var(--text);
  border: none;
  height: 36px;
  padding: 0 14px;
  border-radius: 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.action-pill:hover { background: var(--bg-hover); }
.action-pill svg { width: 20px; height: 20px; fill: currentColor; }
.action-pill.active { background: #3ea6ff; color: var(--bg); }
.action-pill.active svg { fill: currentColor; }

.like-group {
  display: inline-flex;
  background: var(--bg-3);
  border-radius: 18px;
  overflow: hidden;
}
.like-group .action-pill {
  border-radius: 0;
  background: transparent;
}
.like-group .action-pill:hover { background: var(--bg-hover); }
.like-group .divider { width: 1px; background: var(--border); margin: 6px 0; }

.description {
  margin-top: 12px;
  background: var(--bg-3);
  border-radius: 12px;
  padding: 12px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  cursor: pointer;
}
.description.collapsed .desc-body { max-height: 60px; overflow: hidden; mask-image: linear-gradient(to bottom, black 60%, transparent); }
.description .more-btn { font-weight: 500; color: var(--text); margin-top: 4px; display: inline-block; }
.desc-stats { font-weight: 500; margin-bottom: 8px; }
.description a { color: var(--link); }

/* Comments */
.comments { margin-top: 24px; }
.comments h3 { font-size: 16px; margin-bottom: 16px; }
.comment {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}
.comment .avatar { width: 40px; height: 40px; }
.comment .c-body { flex: 1; min-width: 0; }
.comment .c-head { font-size: 13px; margin-bottom: 4px; }
.comment .c-author { font-weight: 500; }
.comment .c-time { color: var(--text-2); font-size: 12px; margin-left: 6px; }
.comment .c-text { font-size: 14px; line-height: 1.4; white-space: pre-wrap; }
.comment .c-stats { display: flex; gap: 16px; margin-top: 8px; font-size: 12px; color: var(--text-2); }

/* Related */
.related {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.related-card {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 8px;
  cursor: pointer;
}
.related-card:hover .title { color: white; }
.related-card .thumb { border-radius: 8px; aspect-ratio: 16 / 9; }
.related-card .info { padding: 0; }
.related-card .title { font-size: 14px; font-weight: 500; -webkit-line-clamp: 2; }
.related-card .sub { font-size: 12px; }

/* ==================== Channel page ==================== */
.channel-banner {
  width: 100%;
  height: 200px;
  background: var(--bg-3);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
}
.channel-banner img { width: 100%; height: 100%; object-fit: cover; }
.channel-header {
  display: flex;
  gap: 24px;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.channel-avatar-large {
  width: 128px; height: 128px;
  border-radius: 50%;
  background: var(--bg-3);
  overflow: hidden;
  flex-shrink: 0;
}
.channel-avatar-large img { width: 100%; height: 100%; object-fit: cover; }
.channel-info h1 { font-size: 32px; font-weight: 700; margin-bottom: 8px; }
.channel-info .ch-stats { color: var(--text-2); font-size: 14px; }
.channel-info .ch-desc {
  margin-top: 8px;
  color: var(--text-2);
  font-size: 14px;
  max-width: 600px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==================== Toast & Modal ==================== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.95);
  color: #0f0f0f;
  padding: 12px 20px;
  border-radius: 24px;
  font-size: 14px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  z-index: 200;
  animation: toast-in 0.2s;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.modal {
  position: fixed; inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.7);
}
.modal-box {
  position: relative;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 500px;
  padding: 16px 24px 24px;
}
.settings-modal-box {
  background: var(--bg);
}
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-head h3 { font-size: 18px; }

.share-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
@media (max-width: 600px) {
  .share-buttons { grid-template-columns: repeat(3, 1fr); }
}
.share-btn {
  background: transparent;
  border: none;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  padding: 8px;
  border-radius: 8px;
}
.share-btn:hover { background: var(--bg-3); }
.share-icon {
  width: 48px; height: 48px;
  background: var(--bg-3);
  border-radius: 50%;
  display: inline-flex;
  align-items: center; justify-content: center;
  font-size: 24px;
  font-weight: 700;
}
.share-link {
  background: var(--bg-3);
  border-radius: 8px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.share-link input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  outline: none;
  font-size: 14px;
}

/* ==================== Responsive ==================== */
@media (max-width: 1280px) {
  .watch { grid-template-columns: 1fr; }
}
@media (max-width: 1024px) {
  .sidebar { width: var(--sidebar-mini-w); }
  .sidebar .sb-section { border: none; padding: 0; }
  .sidebar .sb-title, .sidebar .sb-footer,
  .sidebar .sb-section:nth-child(n+3) { display: none; }
  .sidebar .sb-item {
    flex-direction: column;
    gap: 6px;
    height: 74px;
    padding: 14px 0 0;
    font-size: 10px;
    border-radius: 12px;
    margin: 0 4px;
  }
  .content { margin-left: var(--sidebar-mini-w); }
}
@media (max-width: 768px) {
  .sidebar { display: none; }
  .content {
    margin-left: 0;
    padding-bottom: 72px;
  }
  .topbar {
    padding: 0 10px;
  }
  .chipbar {
    padding: 10px 12px;
  }
  .subs-strip {
    top: calc(var(--topbar-h) + 52px);
    padding: 6px 12px 10px;
  }
  .subs-pill-name { max-width: 96px; }

  .tb-left {
    gap: 4px;
    min-width: 0;
  }
  .tb-left #menuBtn,
  .tb-right #kbdBtn,
  .mic-btn,
  .tb-center {
    display: none;
  }
  .tb-right {
    margin-left: auto;
    gap: 4px;
  }
  .brand {
    font-size: 18px;
    padding-right: 4px;
  }
  .brand .logo {
    width: 30px;
    height: 22px;
    border-radius: 7px;
  }
  .tb-right #settingsBtn,
  .tb-right [data-toast],
  .tb-right .avatar-btn {
    display: inline-flex;
  }
  .tb-right .icon-btn {
    width: 36px;
    height: 36px;
  }
  .grid-wrap { padding: 12px 0 40px; }
  .section-title,
  .section-actions,
  .empty,
  .history-search,
  .library-overview,
  .feed-group,
  .channel-header,
  .channel-tabs,
  .channel-banner {
    margin-left: 12px;
    margin-right: 12px;
  }
  .grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .card {
    padding: 0 0 10px;
  }
  .card .thumb {
    border-radius: 0;
    margin: 0;
    width: 100%;
  }
  .meta {
    padding: 10px 12px 0;
    gap: 10px;
  }
  .avatar {
    width: 34px;
    height: 34px;
  }
  .title {
    font-size: 15px;
  }
  .sub {
    font-size: 13px;
  }
  .chipbar {
    padding: 10px 12px;
  }
  .watch { padding: 0; }
  .player { border-radius: 0; }
  .watch-main { padding: 0 0 24px; }
  .watch-title,
  .watch-channel,
  .action-row,
  .description,
  .comments,
  .watch-sidebar-head,
  .related {
    margin-left: 12px;
    margin-right: 12px;
  }
  .watch-title { font-size: 18px; }
  .watch-channel {
    align-items: flex-start;
  }
  .action-row {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    scrollbar-width: none;
  }
  .action-row::-webkit-scrollbar { display: none; }
  .action-pill,
  .like-group { flex-shrink: 0; }
  .related-card {
    grid-template-columns: 160px 1fr;
    padding-bottom: 8px;
  }
  .mobile-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: 60px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    background: rgba(15,15,15,0.96);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(14px);
    z-index: 120;
  }
  body.light .mobile-nav {
    background: rgba(255,255,255,0.96);
  }
  .mobile-nav-item {
    border: 0;
    background: transparent;
    color: var(--text-2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 11px;
    cursor: pointer;
  }
  .mobile-nav-item svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
  }
  .mobile-nav-item.active {
    color: var(--text);
  }
  .mobile-search-sheet {
    position: fixed;
    inset: 0;
    z-index: 180;
    display: block;
  }
  .mobile-search-sheet[hidden] {
    display: none;
  }
  .mobile-search-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.55);
  }
  .mobile-search-panel {
    position: relative;
    background: var(--bg);
    min-height: 100%;
    padding-top: env(safe-area-inset-top, 0px);
  }
  .mobile-search-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
  }
  .mobile-search-form {
    flex: 1;
  }
  .mobile-search-form input {
    width: 100%;
    height: 40px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--bg-3);
    color: var(--text);
    padding: 0 16px;
    outline: none;
    font-size: 16px;
  }
  .mobile-search-suggest {
    padding: 8px 0 80px;
  }
  .mobile-search-suggest .suggest-item {
    padding: 12px 16px;
    font-size: 15px;
  }
  .modal {
    padding: 0;
    align-items: flex-end;
  }
  .modal-box {
    width: 100%;
    max-width: none;
    border-radius: 18px 18px 0 0;
    padding: 16px 16px calc(24px + env(safe-area-inset-bottom, 0px));
    max-height: 88vh;
    overflow-y: auto;
  }
  .settings {
    gap: 14px;
  }
  .setting-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 10px;
    padding: 14px 0;
  }
  .setting-row > :first-child,
  .setting-row > :last-child {
    width: 100%;
  }
  .setting-row.setting-row-inline {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }
  .setting-row.setting-row-inline > :first-child {
    width: auto;
    flex: 1;
    min-width: 0;
  }
  .setting-row.setting-row-inline > :last-child {
    width: auto;
    flex-shrink: 0;
  }
  .setting-row.setting-row-toggle {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 52px;
    align-items: center;
    column-gap: 10px;
  }
  .setting-row.setting-row-toggle > :first-child {
    width: auto;
    flex: unset;
    min-width: 0;
  }
  .setting-row.setting-row-toggle > :last-child {
    width: 52px;
    justify-self: end;
  }
  .setting-row select,
  .avatar-settings,
  .settings-input {
    width: 100%;
    max-width: none;
  }
  .setting-row.setting-row-action .action-pill {
    width: auto;
    max-width: none;
    padding-inline: 14px;
  }
  .switch {
    align-self: center;
    margin-right: 0;
  }
  .avatar-settings {
    grid-template-columns: 72px 52px 1fr;
  }
  .avatar-settings .settings-input:last-child {
    grid-column: 1 / -1;
  }
}

/* ==================== v2 新增樣式 ==================== */
/* 淺色主題 */
body.light {
  --bg: #fff;
  --bg-2: #f2f2f2;
  --bg-3: #f8f8f8;
  --bg-hover: #e5e5e5;
  --border: #e5e5e5;
  --text: #0f0f0f;
  --text-2: #606060;
  --text-3: #909090;
  --chip-bg: #f2f2f2;
  --chip-active-bg: #0f0f0f;
  --chip-active-text: #fff;
}
body.light .my-avatar { background: var(--accent); color: #fff; }

/* 區域標籤 */
.region-tag {
  font-size: 10px;
  background: rgba(41, 98, 255, 0.18);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 4px;
  font-weight: 600;
  vertical-align: super;
  letter-spacing: 0.4px;
}

/* 清除搜尋框按鈕 */
.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  color: var(--text);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.clear-btn:hover { background: var(--bg-hover); }
.clear-btn svg { width: 18px; height: 18px; fill: currentColor; }

/* Chipbar 左右捲動箭頭 (chipbar 本體已是 sticky；sticky 也是 positioned，子元素 absolute 會以它為基準) */
.chip-track {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-behavior: smooth;
  flex: 1;
}
.chip-track::-webkit-scrollbar { display: none; }
.chip-scroll {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 100%;
  background: linear-gradient(90deg, var(--bg) 30%, transparent);
  border: 0;
  color: var(--text);
  cursor: pointer;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
}
.chip-scroll svg { width: 24px; height: 24px; fill: currentColor; background: var(--bg-3); border-radius: 50%; padding: 4px; }
.chip-scroll.left { left: 0; }
.chip-scroll.right { right: 0; transform: translateY(-50%) scaleX(-1); }
.chip-scroll[hidden] { display: none; }

/* 觀看進度紅條 */
.progress-bar {
  position: absolute;
  bottom: 0; left: 0;
  height: 3px;
  background: var(--accent);
  z-index: 2;
  transition: width .3s;
}

/* 上下文選單 */
.ctx-menu {
  position: fixed;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  z-index: 200;
  min-width: 220px;
}
.ctx-menu[hidden] { display: none; }
.ctx-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 16px;
  background: transparent;
  border: 0;
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  text-align: left;
}
.ctx-item:hover { background: var(--bg-hover); }
.ctx-item svg { width: 20px; height: 20px; fill: currentColor; flex-shrink: 0; }

/* Mini sidebar tooltip */
.mini-tooltip {
  position: fixed;
  background: var(--bg-3);
  color: var(--text);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  z-index: 300;
  pointer-events: none;
  white-space: nowrap;
}
.mini-tooltip[hidden] { display: none; }

/* Settings 內容 */
.settings { display: flex; flex-direction: column; gap: 4px; }
.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 4px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}
.setting-row:last-child { border-bottom: 0; }
.setting-row.danger .set-label { color: #ff5757; }
.setting-row-inline {
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.setting-row-inline > :first-child {
  flex: 1;
  min-width: 0;
}
.setting-row-inline > :last-child {
  width: auto;
  flex-shrink: 0;
}
.setting-row-toggle {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px;
  align-items: center;
  column-gap: 10px;
}
.setting-row-toggle > :first-child {
  width: auto;
  flex: unset;
  min-width: 0;
}
.setting-row-toggle > :last-child {
  width: 44px;
  justify-self: end;
}
.setting-row-action .action-pill {
  min-width: 0;
}
.set-label { font-size: 14px; font-weight: 500; }
.set-hint { font-size: 12px; color: var(--text-2); margin-top: 2px; }
.settings select {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
.avatar-settings {
  display: grid;
  grid-template-columns: 68px 44px minmax(160px, 1fr);
  gap: 8px;
  width: min(360px, 100%);
}
.settings-input,
.settings-color {
  width: 100%;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  padding: 0 12px;
  outline: none;
}
.settings-input.small {
  text-transform: uppercase;
  text-align: center;
  font-weight: 700;
  letter-spacing: .04em;
}
.settings-color {
  padding: 4px;
  cursor: pointer;
}
.settings-input:focus,
.settings-color:focus {
  border-color: var(--link);
}
.action-pill.danger { background: #ff5757; color: #fff; border: 0; }
.action-pill.danger:hover { background: #ff3838; }

/* Switch toggle */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
}
.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #909090;
  border-radius: 999px;
  transition: .2s;
}
.slider::before {
  position: absolute;
  content: "";
  width: 16px;
  height: 16px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
}
.switch input:checked + .slider {
  background: #3ea6ff;
  box-shadow: inset 0 0 0 1px rgba(62,166,255,.25);
}
.switch input:checked + .slider::before {
  transform: translateX(18px);
  background: #fff;
}

/* Share modal time checkbox */
.share-time {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-2);
}
.share-time input { width: 16px; height: 16px; }

/* Keyboard shortcuts */
.kbd-list { display: flex; flex-direction: column; gap: 2px; }
.kbd-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}
.kbd-row:last-child { border-bottom: 0; }
.kbd-row span { font-size: 14px; }
kbd {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: monospace;
  font-size: 12px;
  margin-left: 4px;
}

/* 頻道頁子分頁 */
.channel-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin: 16px 0;
  padding: 0 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-tabs::-webkit-scrollbar { display: none; }
.ch-tab {
  background: transparent;
  border: 0;
  color: var(--text-2);
  padding: 12px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.ch-tab.active { color: var(--text); border-bottom-color: var(--text); }
.ch-tab:hover { color: var(--text); }

/* History 搜尋框 */
.history-search {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  max-width: 500px;
}
.history-search input {
  flex: 1;
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 8px 16px;
  font-size: 14px;
}
.history-search input:focus { outline: none; border-color: var(--link); }

/* 自動播放倒數 */
.autoplay-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  z-index: 10;
}
.autoplay-overlay h4 { margin-bottom: 8px; }
.autoplay-overlay .countdown {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: 3px solid #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 16px 0;
}
.autoplay-overlay .ap-actions {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.autoplay-overlay button {
  background: rgba(255,255,255,0.2);
  border: 1px solid #fff;
  color: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  cursor: pointer;
}

/* 探索分類英雄區 */
.explore-hero {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.explore-card {
  position: relative;
  height: 110px;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  background: linear-gradient(135deg, #ff5e62, #ff9966);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  transition: transform .2s;
}
.explore-card:hover { transform: scale(1.03); }
.explore-card.music { background: linear-gradient(135deg, #ff5e62, #ff2d70); }
.explore-card.movies { background: linear-gradient(135deg, #5b6cff, #2d2dff); }
.explore-card.live { background: linear-gradient(135deg, #ff0000, #c00); }
.explore-card.gaming { background: linear-gradient(135deg, #00d4ff, #0066ff); }
.explore-card.news { background: linear-gradient(135deg, #00b4d8, #0077b6); }
.explore-card.sports { background: linear-gradient(135deg, #f9c74f, #f8961e); }
.explore-card.learning { background: linear-gradient(135deg, #43aa8b, #4d908e); }
.explore-card.fashion { background: linear-gradient(135deg, #ff9a9e, #fad0c4); color: #333; }
.explore-card.podcasts { background: linear-gradient(135deg, #a18cd1, #fbc2eb); }

/* 訂閱聚合：頻道首頁 group */
.feed-group { margin-bottom: 32px; }
.feed-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.feed-group-head .avatar { width: 40px; height: 40px; }
.feed-group-head h3 { font-size: 16px; }
.feed-group-head a { color: var(--text-2); font-size: 13px; margin-left: auto; }

/* watch sidebar autoplay toggle */
.watch-sidebar-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.watch-sidebar-head .autoplay-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
}

/* 輕微動畫 */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.card, .related-card, .comment { animation: fadeIn .3s ease; }

/* Skeleton loader */
.skeleton-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px 12px; }
.skel-card .skel-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(90deg, var(--bg-2), var(--bg-3), var(--bg-2));
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
  border-radius: 12px;
}
.skel-card .skel-line {
  height: 12px;
  background: var(--bg-2);
  border-radius: 4px;
  margin-top: 8px;
}
.skel-card .skel-line.short { width: 60%; }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* 空狀態圖標 */
.empty-icon svg { width: 60px; height: 60px; color: var(--text-2); }

/* 媒體庫總覽卡片 */
.library-overview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.library-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface-2);
  border: 0;
  border-radius: 12px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: background .15s;
}
.library-card:hover { background: var(--surface-3); }
.library-card .lib-icon {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--text);
}
.library-card .lib-icon svg { width: 28px; height: 28px; }
.library-card .lib-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.library-card .lib-title { font-size: 16px; font-weight: 500; color: var(--text); }
.library-card .lib-meta { font-size: 12px; color: var(--text-2); }

/* ==================== Shorts 全螢幕直式播放器 (抄 YouTube) ==================== */
.shorts-viewer {
  position: fixed;
  top: var(--topbar-h);
  left: var(--sidebar-w);
  right: 0;
  bottom: 0;
  background: #000;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
  z-index: 30;
}
.shorts-viewer::-webkit-scrollbar { display: none; }
.app.mini .shorts-viewer { left: var(--sidebar-mini-w); }

.shorts-slide {
  position: relative;
  width: 100%;
  height: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shorts-stage {
  position: relative;
  height: calc(100% - 24px);
  max-height: calc(100vh - var(--topbar-h) - 24px);
  aspect-ratio: 9 / 16;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 32px rgba(0,0,0,0.5);
}
.shorts-stage iframe,
.shorts-stage .shorts-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
/* iframe 不接受任何點擊（避免觸發 YT 內部 ripple/控制列），點擊由外層處理 */
.shorts-stage iframe { pointer-events: none; }
.shorts-poster {
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.shorts-poster::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.6));
}
.shorts-poster .play-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  z-index: 1;
}
.shorts-poster .play-icon svg { width: 32px; height: 32px; fill: #fff; }

.shorts-info {
  position: absolute;
  left: 16px;
  right: 80px;
  bottom: 20px;
  color: #fff;
  z-index: 2;
  pointer-events: none;
}
.shorts-info .si-channel {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  pointer-events: auto;
}
.shorts-info .si-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-3);
  overflow: hidden;
  flex-shrink: 0;
}
.shorts-info .si-avatar img { width: 100%; height: 100%; object-fit: cover; }
.shorts-info .si-name {
  font-size: 14px;
  font-weight: 500;
}
.shorts-info .si-subscribe {
  background: #fff;
  color: #000;
  border: 0;
  padding: 6px 14px;
  border-radius: 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-left: 8px;
  pointer-events: auto;
}
.shorts-info .si-subscribe.subbed {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.shorts-info .si-title {
  font-size: 14px;
  line-height: 1.4;
  text-shadow: 0 1px 4px rgba(0,0,0,0.7);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.shorts-actions {
  position: absolute;
  right: 12px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  z-index: 2;
}
.shorts-actions button {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 0;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.shorts-actions button:hover { background: rgba(255,255,255,0.28); }
.shorts-actions button.active { color: #ff4060; }
.shorts-actions svg { width: 24px; height: 24px; fill: currentColor; }
.shorts-actions .sa-label {
  position: absolute;
  bottom: -18px;
  font-size: 12px;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.7);
  white-space: nowrap;
}
.shorts-action-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.shorts-action-wrap > .sa-count {
  font-size: 12px;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.7);
  font-weight: 500;
}

.shorts-nav {
  position: absolute;
  right: 12px;
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 5;
}
.shorts-nav button {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  border: 0;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.shorts-nav button:hover { background: rgba(0,0,0,0.75); }
.shorts-nav button:disabled { opacity: 0.3; cursor: not-allowed; }
.shorts-nav svg { width: 20px; height: 20px; fill: currentColor; }

@media (max-width: 768px) {
  .shorts-viewer { left: 0; top: var(--topbar-h); }
  .shorts-stage { height: calc(100vh - var(--topbar-h)); border-radius: 0; aspect-ratio: auto; width: 100%; }
  .shorts-nav { display: none; }
}