/* Polibase Lite: plain dark "instrument" register (tokens from frontend/src/index.css). */
:root {
  --bg: hsl(225 8% 7%);
  --fg: hsl(220 10% 96%);
  --card: hsl(225 8% 11%);
  --muted: hsl(225 8% 13%);
  --muted-fg: hsl(225 6% 65%);
  --primary: hsl(18 85% 58%);
  --primary-fg: hsl(25 30% 8%);
  --border: hsl(225 6% 18%);
  --border-accent: hsl(225 6% 26%);
  --radius: 8px;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 var(--sans); }
a { color: var(--fg); text-decoration-color: var(--border-accent); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--primary); }
code { font-family: var(--mono); font-size: .88em; background: var(--muted); padding: .1em .35em; border-radius: 4px; }
main { max-width: 64rem; margin: 0 auto; padding: 0 1rem 3rem; }

.top { max-width: 64rem; margin: 0 auto; padding: 1rem; display: flex; align-items: center; justify-content: space-between; }
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; text-decoration: none; display: inline-flex; align-items: center; gap: .35rem; }
.brand-dot { width: .45rem; height: .45rem; border-radius: 50%; background: var(--primary); }
.top nav a { color: var(--muted-fg); text-decoration: none; }
.top nav a:hover { color: var(--fg); }
.foot { max-width: 64rem; margin: 0 auto; padding: 2rem 1rem; color: var(--muted-fg); font-size: .85rem; border-top: 1px solid var(--border); }

input, select, button { font: inherit; color: inherit; }
input, select { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: .55rem .7rem; min-width: 0; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }
button, .btn { background: var(--primary); color: var(--primary-fg); border: 0; border-radius: var(--radius); padding: .55rem 1rem; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; }
button:disabled { opacity: .4; cursor: default; }

.search { margin: 1.5rem 0 1rem; }
.search-row { display: flex; gap: .5rem; }
.search-row .q { flex: 1; font-size: 1.05rem; padding: .75rem .9rem; }
.filters { margin-top: .6rem; }
.filters summary { color: var(--muted-fg); cursor: pointer; font-size: .9rem; }
.filter-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr)); gap: .6rem; margin-top: .6rem; }
.filter-grid label { display: flex; flex-direction: column; gap: .25rem; font-size: .8rem; color: var(--muted-fg); }
.filter-grid input, .filter-grid select { color: var(--fg); }

.intro { color: var(--muted-fg); max-width: 44rem; }
.tips { padding-left: 1.1rem; }
.tips li { margin: .25rem 0; }
.status { color: var(--muted-fg); font-size: .9rem; border-bottom: 1px solid var(--border); padding-bottom: .6rem; }
.status .ms { font-family: var(--mono); font-size: .8rem; margin-left: .4rem; opacity: .7; }
.hint { font-size: .85rem; }

.hits { list-style: none; padding: 0; margin: 0; }
.hit { padding: .9rem 0; border-bottom: 1px solid var(--border); }
.hit-title { font-weight: 600; text-decoration: none; }
.hit-title:hover { text-decoration: underline; text-decoration-color: var(--primary); }
.meta { display: flex; flex-wrap: wrap; gap: .25rem .9rem; color: var(--muted-fg); font-size: .82rem; margin: .2rem 0 .35rem; }
.meta a { color: var(--muted-fg); }
.meta .ts, .ts { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.snip { margin: .2rem 0; }
.snip.en { color: var(--muted-fg); font-size: .93rem; }
.tag { font-family: var(--mono); font-size: .7rem; border: 1px solid var(--border-accent); border-radius: 4px; padding: 0 .3rem; margin-right: .2rem; }
mark { background: none; color: var(--fg); box-shadow: inset 0 -2px 0 var(--primary); }
.next { display: inline-block; margin-top: 1rem; }

.video h1 { font-size: 1.5rem; line-height: 1.25; margin: 1.2rem 0 .3rem; }
.player-wrap { margin: 1rem 0; position: sticky; top: 0; z-index: 20; background: var(--bg); padding-bottom: .5rem; }
.frame { position: relative; aspect-ratio: 16 / 9; max-height: 42vh; width: 100%; background: #000; border-radius: var(--radius); overflow: hidden; }
.frame iframe, .frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #000; }
.note { color: var(--muted-fg); font-size: .9rem; }
.tools { display: flex; gap: .5rem; margin: .5rem 0 1rem; flex-wrap: wrap; }
.tools #find { flex: 1; min-width: 12rem; }
.tools button { background: var(--card); color: var(--fg); border: 1px solid var(--border); font-weight: 500; }

.transcript { list-style: none; padding: 0; margin: 0; }
.seg { border-left: 2px solid transparent; padding: .15rem 0 .15rem .5rem; scroll-margin-top: 45vh; }
.seg.focus, .seg.playing { border-left-color: var(--primary); background: var(--muted); }
.seg.hidden { display: none; }
.who { font-weight: 600; margin-top: .9rem; font-size: .92rem; }
.who span { color: var(--muted-fg); font-weight: 400; }
.row { display: grid; grid-template-columns: 4.6rem 1fr auto; gap: .5rem; align-items: baseline; }
.row .ts { background: none; color: var(--muted-fg); padding: 0; font-weight: 400; font-size: .8rem; text-align: left; }
.row .ts:not(:disabled):hover { color: var(--primary); }
.txt p { margin: 0; }
.eng { display: none; }
.show-en .eng { display: block; }
.show-en .orig { display: none; }
.src { font-size: .75rem; color: var(--muted-fg); }

.prose { max-width: 44rem; }
.prose h1 { font-size: 1.6rem; }
.prose li { margin: .3rem 0; }

@media (max-width: 40rem) {
  .row { grid-template-columns: 3.6rem 1fr; }
  .src { grid-column: 2; }
  .frame { max-height: 34vh; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }