:root {
  --bg: #0f0f0f; --bg2: #181818; --card: #212121; --hover: #2a2a2a; --border: #303030;
  --text: #f1f1f1; --muted: #aaa; --accent: #ff3b5c; --ok: #4ade80; --warn: #fbbf24;
  --tabs-h: 56px; --mini-h: 60px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { background: var(--bg); }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.ell { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.err { color: #f87171; min-height: 20px; font-size: 14px; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg2); border: 1px solid var(--border);
  border-radius: 10px; padding: 11px 12px; font-size: 16px; width: 100%; outline-color: var(--accent);
  -webkit-appearance: none; appearance: none;
}
input[type=checkbox] { width: auto; -webkit-appearance: checkbox; appearance: auto; accent-color: var(--accent); }
input[type=range] { padding: 0; border: 0; background: none; -webkit-appearance: auto; appearance: auto; accent-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px;
  border: 0; background: var(--card); cursor: pointer; font-size: 14px; white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn.primary { background: var(--accent); color: #fff; font-weight: 600; }
.btn.danger { color: #f87171; }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; }
.icon-btn {
  background: none; border: 0; cursor: pointer; font-size: 20px; padding: 8px; line-height: 1;
  min-width: 40px; min-height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%;
}
.icon-btn:active { background: var(--hover); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ---------- đăng nhập ---------- */
.login { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 12px; }
.logo { font-weight: 700; font-size: 19px; letter-spacing: -.3px; }
.logo span { color: var(--accent); }
.logo.big { font-size: 28px; text-align: center; }
.login .muted { text-align: center; font-size: 14px; margin: 0 0 6px; }

/* ---------- khung ---------- */
.top {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 8px;
  padding: calc(6px + env(safe-area-inset-top)) 8px 6px 16px; background: rgba(15,15,15,.96);
  backdrop-filter: blur(8px);
}
.top .logo { flex: 1; }
.badge { font-size: 12px; background: var(--warn); color: #000; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
main { max-width: 960px; margin: 0 auto; padding: 0 0 calc(var(--tabs-h) + 24px + env(safe-area-inset-bottom)); }
body.has-mini main { padding-bottom: calc(var(--tabs-h) + var(--mini-h) + 24px + env(safe-area-inset-bottom)); }
.pad { padding: 0 16px; }
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; display: flex; background: var(--bg);
  border-top: 1px solid var(--border); padding-bottom: env(safe-area-inset-bottom);
}
.tabs a { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 1px; font-size: 11px; padding: 6px 0 4px; color: var(--muted); height: var(--tabs-h); justify-content: center; }
.tabs a span { font-size: 20px; filter: grayscale(1); opacity: .8; }
.tabs a.on { color: var(--text); }
.tabs a.on span { filter: none; opacity: 1; }

/* ---------- mini player ---------- */
.mini {
  position: fixed; left: 0; right: 0; bottom: calc(var(--tabs-h) + env(safe-area-inset-bottom)); z-index: 29;
  height: var(--mini-h); display: flex; align-items: center; gap: 10px; padding: 0 6px 0 8px;
  background: #212121; border-top: 1px solid var(--border); cursor: pointer;
}
.mini img { width: 64px; height: 36px; object-fit: cover; border-radius: 4px; background: #000; flex: none; }
.mini-text { flex: 1; min-width: 0; font-size: 14px; }
.mini-text .muted { font-size: 12px; }
.mini-progress { position: absolute; left: 0; right: 0; top: -1px; height: 2px; background: transparent; }
.mini-progress div { height: 100%; width: 0; background: var(--accent); }

/* ---------- danh sách video ---------- */
h2.sec { font-size: 18px; margin: 18px 16px 8px; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
h2.sec a, h2.sec button { font-size: 13px; font-weight: 500; color: var(--muted); }
.hscroll { display: flex; gap: 12px; overflow-x: auto; padding: 0 16px 4px; scroll-snap-type: x mandatory; scrollbar-width: none; }
.hscroll::-webkit-scrollbar { display: none; }
.hscroll .vcard { width: 240px; flex: none; scroll-snap-align: start; }
.vcard { position: relative; }
.thumb { position: relative; display: block; aspect-ratio: 16/9; border-radius: 12px; overflow: hidden; background: var(--card); }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.dur { position: absolute; right: 6px; bottom: 6px; background: rgba(0,0,0,.82); color: #fff; font-size: 12px; padding: 1px 5px; border-radius: 4px; font-weight: 500; }
.dur.live { background: #cc0000; }
.vmeta { display: flex; gap: 8px; padding: 8px 0 0; }
.vmeta .txt { flex: 1; min-width: 0; }
.vtitle { font-size: 14px; font-weight: 500; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.vsub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.more { flex: none; background: none; border: 0; font-size: 18px; padding: 0 4px; color: var(--muted); cursor: pointer; height: 28px; }

.grid { display: grid; grid-template-columns: 1fr; gap: 20px; padding: 0 16px; }
@media (min-width: 640px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .grid { grid-template-columns: 1fr 1fr 1fr; } }

.list { display: flex; flex-direction: column; }
.lrow { display: flex; gap: 10px; padding: 8px 16px; align-items: flex-start; }
.lrow:active { background: var(--bg2); }
.lrow .thumb { width: 160px; flex: none; border-radius: 8px; }
.lrow .txt { flex: 1; min-width: 0; }
.lrow.cur { background: var(--bg2); }
.lrow.cur .vtitle { color: var(--accent); }

.chips { display: flex; gap: 8px; overflow-x: auto; padding: 8px 16px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; padding: 6px 12px; border-radius: 8px; background: var(--card); font-size: 14px; border: 0; cursor: pointer; }
.chip.on { background: var(--text); color: #000; }

.empty { color: var(--muted); padding: 24px 16px; text-align: center; }
.loading { color: var(--muted); padding: 24px 16px; text-align: center; }
.loading::before { content: ""; display: inline-block; width: 16px; height: 16px; border: 2px solid var(--muted); border-top-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -3px; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- tìm kiếm ---------- */
.searchbar { display: flex; gap: 8px; padding: 8px 16px; position: sticky; top: calc(52px + env(safe-area-inset-top)); background: var(--bg); z-index: 10; }
.searchbar input { border-radius: 999px; padding-left: 16px; }

/* ---------- xem video ---------- */
.vdock { position: sticky; top: calc(52px + env(safe-area-inset-top)); z-index: 15; background: var(--bg); }
.vdock .vbox { aspect-ratio: 16/9; max-height: 56vh; width: 100%; background: #000; }
.vdock video, .vdock #ytbox, .vdock iframe, .vdock #ytp { width: 100%; height: 100%; display: block; border: 0; background: #000; }
.vtools { display: flex; gap: 6px; align-items: center; padding: 6px 12px; overflow-x: auto; scrollbar-width: none; border-bottom: 1px solid var(--border); }
.vtools::-webkit-scrollbar { display: none; }
.vtools #vStatus { flex: 1; font-size: 12px; min-width: 60px; }
.winfo { padding: 12px 16px; }
.winfo h1 { font-size: 18px; margin: 0 0 6px; line-height: 1.3; }
.winfo .ch { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.winfo .ch .av { width: 36px; height: 36px; border-radius: 50%; background: var(--card); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.actions { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0; scrollbar-width: none; }
.actions::-webkit-scrollbar { display: none; }
.desc { background: var(--bg2); border-radius: 12px; padding: 10px 12px; margin-top: 12px; font-size: 13px; white-space: pre-wrap; word-break: break-word; max-height: 4.4em; overflow: hidden; cursor: pointer; }
.desc.open { max-height: none; }

/* ---------- thư viện ---------- */
.card { background: var(--bg2); border-radius: 14px; margin: 12px 16px; padding: 14px; }
.card h3 { margin: 0 0 10px; font-size: 16px; }
.plrow { display: flex; gap: 12px; align-items: center; padding: 10px 16px; }
.plrow:active { background: var(--bg2); }
.plcover { width: 96px; aspect-ratio: 16/9; border-radius: 8px; background: var(--card) center/cover; flex: none; display: flex; align-items: flex-end; justify-content: flex-end; }
.plcover span { background: rgba(0,0,0,.8); font-size: 11px; padding: 1px 5px; border-radius: 4px; margin: 4px; }
.plhead { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.plhead h1 { margin: 0; font-size: 22px; }
.dl { flex: none; min-width: 42px; height: 28px; border-radius: 999px; border: 0; background: var(--card); font-size: 12px; cursor: pointer; font-variant-numeric: tabular-nums; }
.dl.done { color: var(--ok); }
.dl.err { color: var(--warn); }
.toggle { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 14px; cursor: pointer; }
.toggle input { width: 18px; height: 18px; }
table.users { width: 100%; border-collapse: collapse; font-size: 14px; }
table.users td { padding: 8px 4px; border-bottom: 1px solid var(--border); }
.form { display: flex; flex-direction: column; gap: 8px; }

/* ---------- trình phát lớn ---------- */
.player {
  position: fixed; inset: 0; z-index: 50; background: linear-gradient(#2a2a2a, var(--bg) 60%);
  display: flex; flex-direction: column; padding: calc(8px + env(safe-area-inset-top)) 20px calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
}
.player-top { display: flex; align-items: center; justify-content: space-between; margin: 0 -8px; }
.player-top .muted { font-size: 12px; text-align: center; flex: 1; }
.p-cover { width: 100%; max-width: 420px; aspect-ratio: 16/9; object-fit: cover; border-radius: 12px; margin: 16px auto; background: #000; }
.p-meta { max-width: 420px; width: 100%; margin: 0 auto; }
.p-title { font-size: 19px; font-weight: 600; line-height: 1.3; }
.p-src { font-size: 12px; color: var(--ok); margin-top: 6px; min-height: 16px; }
.seek { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; max-width: 420px; width: 100%; margin: 12px auto 0; }
.seek input { flex: 1; }
.p-ctl { display: flex; align-items: center; justify-content: space-between; max-width: 360px; width: 100%; margin: 10px auto; }
.p-ctl .big { font-size: 28px; }
.p-ctl .play { font-size: 30px; width: 68px; height: 68px; background: var(--text); color: #000; }
.p-ctl .on { color: var(--accent); background: rgba(255,59,92,.12); }
.p-actions { display: flex; gap: 8px; justify-content: center; margin-top: 4px; }
.p-queue { max-width: 420px; width: 100%; margin: 14px auto 0; }
.p-queue .lrow { padding: 6px 0; }
.p-queue .lrow .thumb { width: 96px; }

/* ---------- bảng chọn & thông báo ---------- */
.sheet { position: fixed; inset: 0; z-index: 60; background: rgba(0,0,0,.55); display: flex; align-items: flex-end; justify-content: center; }
.sheet-body { background: #212121; width: 100%; max-width: 520px; border-radius: 16px 16px 0 0; padding: 8px 0 calc(12px + env(safe-area-inset-bottom)); max-height: 75vh; overflow-y: auto; }
.sheet-body h3 { margin: 8px 16px 8px; font-size: 16px; }
.sheet-item { display: flex; gap: 12px; align-items: center; width: 100%; padding: 12px 16px; background: none; border: 0; text-align: left; cursor: pointer; font-size: 15px; }
.sheet-item:active { background: var(--hover); }
.sheet-item .ic { width: 24px; text-align: center; }
.toast {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(var(--tabs-h) + var(--mini-h) + 16px + env(safe-area-inset-bottom));
  z-index: 70; background: #f1f1f1; color: #000; padding: 10px 16px; border-radius: 10px; font-size: 14px; max-width: calc(100% - 32px);
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
}
@media (min-width: 900px) {
  .lrow .thumb { width: 200px; }
}