:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16181d;
  --muted: #5f6673;
  --line: #dde1e7;
  --accent: #3b5bdb;
  --danger: #c92a2a;
  --ok: #2b8a3e;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1a1d23;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --line: #2c3038;
    --accent: #7b93f5;
    --danger: #ff6b6b;
    --ok: #69db7c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 860px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.4rem; margin: 8px 0 4px; }
h2 { font-size: 1.05rem; margin: 16px 0 8px; }
.muted { color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}
label { display: block; margin: 10px 0; }
label.check { display: flex; gap: 8px; align-items: center; }
input[type="text"], textarea {
  width: 100%;
  margin-top: 4px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 ui-monospace, Menlo, Consolas, monospace;
}
button {
  padding: 9px 14px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: default; }
button.danger { background: var(--danger); }
button.off { background: var(--muted); }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
#people { list-style: none; padding: 0; margin: 0; }
#people li { padding: 6px 0; border-bottom: 1px solid var(--line); }
#people li.speaking { color: var(--ok); font-weight: 600; }
#videos { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; margin-top: 12px; }
.tile { background: #000; border-radius: 8px; overflow: hidden; }
.tile video { width: 100%; display: block; max-height: 60vh; object-fit: contain; }
.tile .label { color: #fff; font-size: 12px; padding: 4px 8px; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0 0 12px; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }
#log { font: 12px/1.4 ui-monospace, Menlo, Consolas, monospace; padding-left: 20px; max-height: 280px; overflow: auto; }
@media (max-width: 520px) {
  dl { grid-template-columns: 1fr; }
  dt { margin-top: 6px; }
}