/* /browse/: filters and results */
.type-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.fchip { display: inline-flex; align-items: center; gap: 7px; font: inherit; font-size: .9rem; font-weight: 700; padding: 6px 14px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.fchip em { font-style: normal; font-size: .78rem; color: var(--muted); font-weight: 600; }
.fchip:hover { border-color: var(--lv, var(--brand)); }
.fchip.on { background: var(--lv, var(--brand)); border-color: var(--lv, var(--brand)); color: #fff; }
.fchip.on em { color: rgba(255, 255, 255, .85); }
.browse { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 32px; padding-block: 28px; align-items: start; }
.filters { position: sticky; top: 84px; max-height: calc(100vh - 100px); overflow: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 6px 18px 14px; box-shadow: var(--shadow); }
.filters summary { cursor: pointer; font-weight: 800; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.filters summary::-webkit-details-marker { display: none; }
.filters summary::after { content: "+"; font-size: 1.3rem; color: var(--brand); }
.filters details[open] summary::after { content: "\2212"; }
.fcount { background: var(--brand); color: var(--brand-ink); border-radius: 999px; font-size: .75rem; padding: 1px 8px; margin-left: 8px; }
.fgroup { padding: 12px 0; border-top: 1px solid var(--line); }
.fgroup h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 8px; font-family: var(--sans); }
.fgroup .fchip { margin: 0 6px 6px 0; }
.fselect { width: 100%; font: inherit; padding: 9px 12px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--bg); color: var(--ink); }
.fcheck { display: flex; align-items: center; gap: 9px; padding: 5px 0; cursor: pointer; font-size: .95rem; }
.fcheck span { flex: 1; }
.fcheck em { font-style: normal; color: var(--muted); font-size: .8rem; }
.res-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.res-bar p { margin: 0; }
.bres { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.res { display: grid; gap: 3px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); text-decoration: none; color: var(--ink); }
.res:hover { border-color: var(--brand); box-shadow: var(--shadow); }
.res strong { font-size: 1.05rem; }
.rctx { color: var(--muted); font-size: .9rem; }
.rmeta { color: var(--muted); font-size: .82rem; white-space: pre-wrap; }
.rtypes { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 2px; }
.rt { font-size: .72rem; font-weight: 800; padding: 2px 9px; border-radius: 999px; background: var(--note-bg); color: var(--muted); }
.rt-chapter { background: color-mix(in srgb, var(--brand) 14%, var(--surface)); color: var(--brand); }
.rt-worksheet { background: color-mix(in srgb, var(--accent) 28%, var(--surface)); color: #7a5200; }
.rt-video { background: color-mix(in srgb, #e11d48 12%, var(--surface)); color: #be123c; }
.rt-quiz { background: var(--ok-bg); color: var(--ok); }
.rt-paper { background: color-mix(in srgb, #7c3aed 12%, var(--surface)); color: #6d28d9; }
@media (prefers-color-scheme: dark) { .rt-worksheet { color: #f5d98a; } .rt-video { color: #fda4af; } .rt-paper { color: #c4b5fd; } }
@media (max-width: 860px) {
  .browse { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .filters { position: static; max-height: none; }
}