/* 「影片」頁：列出下載資料夾、影片、音樂資料夾裡的影音檔，點了在播放器分頁播放 */
:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card: #ffffff;
  --border: #e3e3e6;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --hover: #f0f0f3;
  --accent: #007aff;
  --chip: #e8e8ed;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --card: #2c2c2e;
    --border: #3a3a3c;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --hover: #3a3a3c;
    --accent: #0a84ff;
    --chip: #3a3a3c;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font: 14px -apple-system, "PingFang TC", "Noto Sans TC", sans-serif; }
.head { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; gap: 14px;
  padding: 18px 28px 12px; background: var(--bg); }
h1 { margin: 0; font-size: 22px; font-weight: 700; }
.filters { display: flex; gap: 4px; background: var(--chip); padding: 3px; border-radius: 8px; }
.filters button { border: none; background: transparent; color: var(--text); padding: 4px 14px;
  border-radius: 6px; font: inherit; font-size: 13px; cursor: pointer; }
.filters button.on { background: var(--card); box-shadow: 0 1px 2px rgba(0,0,0,.15); font-weight: 600; }
.spacer { flex: 1; }
#search { width: 220px; height: 30px; border: 1px solid var(--border); border-radius: 8px; padding: 0 10px;
  background: var(--card); color: var(--text); font: inherit; outline: none; }
#search:focus { border-color: var(--accent); }
.plain { border: 1px solid var(--border); background: var(--card); color: var(--text); height: 30px;
  padding: 0 12px; border-radius: 8px; font: inherit; font-size: 13px; cursor: pointer; }
.plain:hover { border-color: var(--accent); color: var(--accent); }
.roots { margin: 0 28px 10px; color: var(--muted); font-size: 12px; }
.roots:empty { display: none; }
.list { margin: 0 0 28px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.list:empty { display: none; }
.row { display: grid; grid-template-columns: 128px minmax(0, 1fr) 90px 150px 130px; align-items: center; gap: 14px;
  padding: 10px 16px; border-top: 1px solid var(--border); cursor: pointer; }
.row:first-child { border-top: none; }
.row:hover { background: var(--hover); }
/* 縮圖：16:9，沒有縮圖（音樂、還在產生）時是圖示；滑過去浮出播放鈕 */
.thumb { position: relative; width: 128px; height: 72px; border-radius: 8px; overflow: hidden; background: #222;
  display: grid; place-items: center; }
.thumb img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.thumb img[hidden] { display: none; }
.icon { font-size: 26px; }
.icon[hidden] { display: none; }
.play { position: absolute; inset: 0; display: grid; place-items: center; font-size: 22px; color: #fff; opacity: 0;
  background: rgba(0,0,0,.38); transition: opacity .12s; }
.row:hover .play { opacity: 1; }
.meta { min-width: 0; }
.name { font-weight: 600; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.folder { color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 3px; }
.size, .date { color: var(--muted); font-size: 12px; text-align: right; }
.reveal { justify-self: end; border: none; background: transparent; color: var(--accent); font: inherit;
  font-size: 12px; cursor: pointer; padding: 4px 6px; border-radius: 6px; visibility: hidden; }
.row:hover .reveal { visibility: visible; }
.reveal:hover { background: var(--chip); }
.empty { margin: 60px 0; text-align: center; color: var(--muted); }
/* 左邊的資料夾：全部 + 每個來源資料夾（可以展開底下的子資料夾），點了只看那個資料夾 */
.body { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 20px; margin: 0 28px; align-items: start; }
.folders { position: sticky; top: 72px; max-height: calc(100vh - 90px); overflow: auto; padding-bottom: 20px; }
.folders .node { display: flex; align-items: center; gap: 2px; border-radius: 8px; }
.folders .node:hover { background: var(--hover); }
.folders .node.on { background: var(--chip); font-weight: 600; }
.folders .twisty { width: 18px; flex: none; border: none; background: transparent; color: var(--muted); cursor: pointer; padding: 0; font-size: 11px; }
.folders .twisty:disabled { visibility: hidden; }
.folders .pick { flex: 1; min-width: 0; display: flex; align-items: center; gap: 6px; border: none; background: transparent; color: var(--text);
  font: inherit; font-size: 13px; text-align: left; padding: 6px 8px 6px 2px; cursor: pointer; }
.folders .label { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.folders .count { color: var(--muted); font-size: 12px; }
.folders .kids { margin-left: 14px; }
.crumb { margin: 0 0 8px; color: var(--muted); font-size: 12px; min-height: 16px; word-break: break-all; }