:root {
  --bg: #f7f8fa; --panel: #ffffff; --ink: #1c2330; --muted: #5d6676; --line: #e3e6ec; --soft: #f0f2f6;
  --accent: #1865f2; --accent-ink: #ffffff; --accent-soft: #e8f0fe;
  --ok: #1a7f37; --ok-soft: #e6f4ea; --warn: #9a6700; --warn-soft: #fff4d6; --bad: #c4302b; --bad-soft: #fdecea;
  --chip: #eef1f6; --chip-ink: #2b3445; --tag: #e8f0fe; --tag-ink: #0b4fd1; --inh: #f3f4f7; --inh-ink: #6b7280;
  --radius: 10px; --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1218; --panel: #171b23; --ink: #e6e9ef; --muted: #9aa3b2; --line: #2a303b; --soft: #1e232d;
    --accent: #5b8def; --accent-ink: #0b0f16; --accent-soft: #1d2a44;
    --ok: #4ac26b; --ok-soft: #12301c; --warn: #e3b341; --warn-soft: #33290f; --bad: #f47067; --bad-soft: #3a1714;
    --chip: #232937; --chip-ink: #cfd6e2; --tag: #1d2a44; --tag-ink: #9dbcff; --inh: #1e232d; --inh-ink: #8b94a4;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1218; --panel: #171b23; --ink: #e6e9ef; --muted: #9aa3b2; --line: #2a303b; --soft: #1e232d;
  --accent: #5b8def; --accent-ink: #0b0f16; --accent-soft: #1d2a44;
  --ok: #4ac26b; --ok-soft: #12301c; --warn: #e3b341; --warn-soft: #33290f; --bad: #f47067; --bad-soft: #3a1714;
  --chip: #232937; --chip-ink: #cfd6e2; --tag: #1d2a44; --tag-ink: #9dbcff; --inh: #1e232d; --inh-ink: #8b94a4;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body { font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Devanagari", "Noto Nastaliq Urdu", sans-serif; }
a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
.muted { color: var(--muted); } .pad { padding: 24px; } .small { font-size: 12px; } .nowrap { white-space: nowrap; }
.top { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 18px; padding: 10px 20px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--ink); display: flex; align-items: center; gap: 8px; }
.logo { background: var(--accent); color: var(--accent-ink); border-radius: 7px; padding: 2px 6px; font-size: 12px; }
.top nav { display: flex; gap: 4px; }
.top nav a { padding: 6px 10px; border-radius: 8px; color: var(--muted); }
.top nav a.on { background: var(--accent-soft); color: var(--accent); text-decoration: none; }
.quick { flex: 1; min-width: 180px; max-width: 460px; }
.quick input { width: 100%; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--soft); }
.me { margin-left: auto; display: flex; gap: 8px; align-items: center; font-size: 13px; }
main { max-width: 1280px; margin: 0 auto; padding: 20px; }
h1 { font-size: 22px; margin: 4px 0 6px; } h2 { font-size: 16px; margin: 22px 0 10px; } h3 { font-size: 14px; margin: 14px 0 6px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 4px; } .crumbs a { color: var(--muted); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel.pad { padding: 16px; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.card { display: block; padding: 14px 16px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); box-shadow: var(--shadow); }
.card:hover { border-color: var(--accent); text-decoration: none; }
.card .big { font-size: 22px; font-weight: 700; } .card .t { font-weight: 600; margin-bottom: 4px; }
.card.pilot { border-left: 4px solid var(--accent); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.small { padding: 3px 8px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: default; }
input[type=text], input[type=search], input[type=email], select, textarea { padding: 6px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
label.f { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
label.f > * { color: var(--ink); font-size: 14px; }
.badge { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: 11px; font-weight: 600; background: var(--chip); color: var(--chip-ink); white-space: nowrap; }
.badge.ok { background: var(--ok-soft); color: var(--ok); } .badge.warn { background: var(--warn-soft); color: var(--warn); } .badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.acc { background: var(--accent-soft); color: var(--accent); }
table.t { width: 100%; border-collapse: collapse; background: var(--panel); }
table.t th, table.t td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.t th { font-size: 12px; color: var(--muted); font-weight: 600; position: sticky; top: 52px; background: var(--panel); cursor: pointer; user-select: none; }
  .tablewrap table.t th { top: 0; }
table.t tr:hover td { background: var(--soft); }
table.t td.num, table.t th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tablewrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: auto; max-height: 70vh; }
.layout { display: grid; grid-template-columns: 250px 1fr; gap: 16px; align-items: start; }
.side { position: sticky; top: 64px; max-height: calc(100vh - 80px); overflow: auto; }
.side .sec { padding: 10px 12px; border-bottom: 1px solid var(--line); }
.side .sec:last-child { border-bottom: 0; }
.side .item { display: flex; justify-content: space-between; gap: 6px; padding: 4px 6px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.side .item:hover { background: var(--soft); } .side .item.on { background: var(--accent-soft); color: var(--accent); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
.kind { display: inline-block; width: 20px; height: 20px; line-height: 20px; text-align: center; border-radius: 5px; font-size: 11px; font-weight: 700; background: var(--chip); color: var(--chip-ink); flex: none; }
.kind.Video { background: #ffe7d6; color: #a14b00; } .kind.Exercise { background: #dff3e4; color: #15692c; } .kind.Article { background: #e6e9ff; color: #3843b0; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .kind.Video { background: #3b2412; color: #ffb27a; } :root:not([data-theme="light"]) .kind.Exercise { background: #12301c; color: #7ee29a; } :root:not([data-theme="light"]) .kind.Article { background: #1f2348; color: #a8b0ff; } }
.tree .unit { margin: 14px 0 6px; }
.tree .unit > .hd { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; padding: 6px 0; border-bottom: 2px solid var(--line); }
.tree .lesson { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); margin: 8px 0; }
.tree .lesson > .hd { display: flex; align-items: flex-start; gap: 10px; padding: 9px 12px; background: var(--soft); border-radius: var(--radius) var(--radius) 0 0; }
.tree .lesson > .hd .nm { font-weight: 600; flex: 1; min-width: 0; }
.tree .it { display: flex; align-items: flex-start; gap: 8px; padding: 6px 12px; border-top: 1px solid var(--line); font-size: 13px; }
.tree .it .nm { flex: 1; min-width: 0; }
.tree .it .en { color: var(--muted); font-size: 12px; }
.chips { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.chip { display: inline-flex; align-items: center; gap: 4px; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--tag); color: var(--tag-ink); cursor: default; }
.chip.inh { background: var(--inh); color: var(--inh-ink); font-weight: 500; }
.chip.off { background: transparent; color: var(--inh-ink); text-decoration: line-through; border: 1px dashed var(--line); }
.chip.copy { background: var(--ok-soft); color: var(--ok); }
.chip button { border: 0; background: none; padding: 0 0 0 2px; cursor: pointer; color: inherit; font-size: 13px; line-height: 1; }
.addtag { border: 1px dashed var(--line); background: none; border-radius: 999px; padding: 1px 8px; font-size: 12px; cursor: pointer; color: var(--muted); }
.addtag:hover { border-color: var(--accent); color: var(--accent); }
.pop { position: fixed; z-index: 50; width: min(520px, calc(100vw - 32px)); max-height: 60vh; display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.pop input { margin: 10px; }
.pop .list { overflow: auto; padding: 0 6px 8px; }
.pop .opt { display: flex; gap: 10px; padding: 6px 8px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.pop .opt:hover, .pop .opt.sel { background: var(--accent-soft); }
.pop .opt b { flex: none; min-width: 70px; } .pop .opt.lvl1 { padding-left: 22px; } .pop .opt.lvl2 { padding-left: 36px; } .pop .opt.lvl3 { padding-left: 50px; }
.setbar { position: sticky; top: 52px; z-index: 10; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 10px 12px; margin: 10px 0; background: var(--accent-soft); border: 1px solid var(--line); border-radius: var(--radius); }
.hit { display: flex; gap: 10px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.hit:last-child { border-bottom: 0; }
.hit .nm { flex: 1; min-width: 0; }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 28px; text-align: center; color: var(--muted); cursor: pointer; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.issues li { margin: 4px 0; }
#toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 8px; font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 60; }
#toast.on { opacity: 1; }
.signin { max-width: 420px; margin: 60px auto; text-align: center; }
.stat { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0 4px; }
.stat div { font-size: 12px; color: var(--muted); } .stat b { display: block; font-size: 18px; color: var(--ink); }
[hidden] { display: none !important; }
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; } .side { position: static; max-height: none; }
  main { padding: 12px 16px; } .top { padding: 8px 16px; gap: 10px; } .quick { order: 5; max-width: none; flex-basis: 100%; }
  table.t th { top: 0; }
}