/* ============================================================
   Subtitles AI - layout
   应用外壳：轻量 Pro 工具栏侧边 + 内容区 + 视图切换
   ============================================================ */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  position: relative;
  z-index: 2;
  width: min(100%, 1280px);
  height: min(860px, calc(100dvh - clamp(28px, 5vw, 56px)));
  min-height: 640px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 26px;
  background: var(--bg);
  box-shadow:
    0 34px 120px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* ---------- 侧边工具栏 ---------- */
.sidebar {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
  border-right: 1px solid var(--border);
  background: var(--bg);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 14px;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 0;
  overflow: hidden;
  background: transparent;
  border: 0;
  box-shadow: none;
}
.brand__mark img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}
.brand__name {
  font-size: 14.5px; font-weight: 600; letter-spacing: -0.01em;
}

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav__item {
  position: relative;
  display: flex; align-items: center; gap: 10px;
  width: 100%; font: inherit; font-size: 13.5px; font-weight: 500;
  color: var(--text-2); background: transparent; border: 0;
  border-radius: var(--r-control); padding: 9px 11px; cursor: pointer;
  transition: background var(--dur), color var(--dur);
}
.nav__item i { font-size: 18px; }
.nav__item:hover { background: var(--surface-3); color: var(--text); }
.nav__item.is-active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-1); }
.nav__item.is-active::before {
  content: ""; position: absolute; left: 0; top: 50%;
  width: 3px; height: 16px; border-radius: 0 3px 3px 0;
  background: var(--accent); transform: translateY(-50%);
}

.supported-sites {
  margin: 0;
  padding: 0 6px 15px;
  overflow: hidden;
}
.supported-sites__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 0 2px 10px;
}
.supported-sites h2 {
  margin: 0;
  color: var(--text-3);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0;
}
.supported-sites__verified {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--ok-text);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: -0.03em;
  white-space: nowrap;
}
.supported-sites__verified .ph { font-size: 11px; }
.supported-sites__viewport {
  position: relative;
  overflow: hidden;
  min-height: 51px;
  padding: 3px 0;
  isolation: isolate;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 9%, #000 91%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 9%, #000 91%, transparent 100%);
}
.supported-sites__viewport::before {
  content: "";
  position: absolute;
  inset: 0 8px;
  z-index: -1;
  border: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
  border-radius: 13px;
  background: linear-gradient(110deg, color-mix(in srgb, var(--surface-2) 75%, transparent), color-mix(in srgb, var(--accent-soft) 42%, transparent));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
.supported-sites__track {
  display: flex;
  width: max-content;
  gap: 8px;
  animation: sites-marquee 34s linear infinite;
  will-change: transform;
}
.supported-sites__group {
  display: flex;
  flex: none;
  gap: 8px;
}
.site-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  min-width: 91px;
  height: 44px;
  padding: 0 9px 0 7px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--site-color) 42%, var(--border));
  border-radius: 12px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--site-color) 17%, var(--surface)), var(--surface-2));
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: -0.03em;
  text-decoration: none;
  box-shadow:
    0 8px 18px color-mix(in srgb, var(--site-color) 12%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transition: transform var(--dur), border-color var(--dur), box-shadow var(--dur), filter var(--dur);
}
.site-icon:hover {
  filter: brightness(1.06);
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--site-color) 72%, var(--border));
  box-shadow:
    0 12px 24px color-mix(in srgb, var(--site-color) 22%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.site-icon:active {
  transform: translateY(0);
}
.site-icon:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.site-icon__mark {
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  flex: none;
  border-radius: 8px;
  background: var(--site-color);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 4px 10px color-mix(in srgb, var(--site-color) 30%, transparent);
}
.site-icon__mark img {
  display: block;
  width: 17px;
  height: 17px;
  object-fit: contain;
}
.site-icon--wikimedia .site-icon__mark {
  background: #fff;
}
.site-icon--wikimedia .site-icon__mark img {
  width: 19px;
  height: 19px;
}
.site-icon--youtube { --site-color: #ff0033; }
.site-icon--dailymotion { --site-color: #0066dc; }
.site-icon--tiktok { --site-color: #111820; }
.site-icon--wikimedia { --site-color: #7b61ff; }
.site-icon--peertube { --site-color: #f16822; }
.site-icon--niconico { --site-color: #3e5c9a; }
.site-icon--rumble { --site-color: #79c900; }
.site-icon--soundcloud { --site-color: #ff6a00; }
.site-icon--bandcamp { --site-color: #1da0c3; }
.site-icon--twitch { --site-color: #9147ff; }
.site-icon__label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@keyframes sites-marquee {
  from { transform: translateX(calc(-50% - 4px)); }
  to { transform: translateX(0); }
}

.supported-sites__viewport:hover .supported-sites__track,
.supported-sites__viewport:focus-within .supported-sites__track {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .supported-sites__track { animation: none; transform: none; }
}

.sidebar__spacer { flex: 1; }
.sidebar__foot {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 6px 2px; border-top: 1px solid var(--border);
}

/* ---------- 内容区 ---------- */
.content {
  position: relative;
  z-index: 2;
  min-width: 0;
  padding: 26px clamp(20px, 3.5vw, 44px) 64px;
  max-width: 1160px;
  overflow: auto;
}

.view { display: none; }
.view.is-active { display: block; animation: viewIn 0.4s var(--ease); }

@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 窄屏：侧栏转顶部条 ---------- */
@media (max-width: 820px) {
  body {
    padding: 12px;
    place-items: center;
  }
  .app {
    grid-template-columns: 1fr;
    width: min(100%, 760px);
    height: calc(100dvh - 24px);
    min-height: 0;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 20px;
  }
  .sidebar {
    position: sticky; top: 0; height: auto; flex-direction: row; align-items: center;
    gap: 10px; padding: 8px 14px;
    border-right: 0; border-bottom: 1px solid var(--border);
  }
  .brand { padding: 0; }
  .brand__name { display: none; }
  .supported-sites {
    margin: 0;
    padding: 0;
  }
  .supported-sites__head { display: none; }
  .supported-sites__viewport { min-height: 38px; padding: 0; }
  .supported-sites__viewport::before { inset: -3px 0; }
  .site-icon { min-width: 84px; height: 34px; font-size: 10px; padding: 0 7px 0 5px; }
  .site-icon__mark { width: 22px; height: 22px; border-radius: 6px; }
  .site-icon__mark img { width: 14px; height: 14px; }
  .site-icon--wikimedia .site-icon__mark img { width: 16px; height: 16px; }
  .nav { flex-direction: row; flex: 1; }
  .nav__item { width: auto; padding: 8px 12px; }
  .nav__item.is-active::before { left: 50%; top: auto; bottom: -8px; width: 18px; height: 3px; border-radius: 3px 3px 0 0; transform: translateX(-50%); }
  .sidebar__spacer { display: none; }
  .sidebar__foot { padding: 0; border-top: 0; }
  .content { padding: 20px 16px 56px; }
}