:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #16181d;
  --muted: #5f6673;
  --line: #dde1e7;
  --accent: #1d5fd1;
  --accent-text: #ffffff;
  --danger: #b42318;
  --ok: #1f9d55;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #181b21;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --line: #2a2f38;
    --accent: #5b8def;
    --accent-text: #0f1115;
    --danger: #f97066;
    --ok: #3ccf7e;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
[hidden] { display: none !important; }
.wrap { max-width: 720px; margin: 0 auto; padding: 24px 16px 64px; }
.top h1 { margin: 0; font-size: 22px; }
h2 { margin: 0; font-size: 16px; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.upper { text-transform: uppercase; }
.big { font-size: 22px; letter-spacing: 2px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-top: 16px; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 480px) { .grid2 { grid-template-columns: 1fr; } }
label { display: flex; flex-direction: column; gap: 4px; font-weight: 500; }
label.check, fieldset label { flex-direction: row; align-items: center; gap: 6px; font-weight: 400; }
fieldset { border: 0; padding: 0; margin: 0; display: flex; gap: 16px; flex-wrap: wrap; }
legend { font-weight: 500; margin-bottom: 4px; width: 100%; }
input, textarea { font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; }
textarea { width: 100%; resize: vertical; font-size: 13px; }
.custom input { flex: 1; min-width: 0; }
.custom .port { flex: 0 0 96px; }
button { font: inherit; border-radius: 6px; padding: 8px 14px; border: 1px solid var(--line); background: var(--card); color: var(--text); cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.danger { color: var(--danger); border-color: var(--danger); align-self: flex-start; }
button.link { border: 0; background: none; padding: 0; color: var(--accent); }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab.is-active { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.room-head { display: flex; flex-direction: column; gap: 8px; }
.error { color: var(--danger); margin: 0; min-height: 1em; }
details summary { cursor: pointer; color: var(--muted); }
.peers { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
@media (max-width: 560px) { .peers { grid-template-columns: 1fr; } }
.peer { border: 1px solid var(--line); border-radius: 8px; padding: 12px; }
.shares { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.share-fix { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin: 2px 0 0 16px; font-size: 13px; }
.share-fix code { background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--line); margin-right: 8px; vertical-align: middle; }
.dot.on { background: var(--ok); }