:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #1f2d3d;
  --muted: #5b6b7c;
  --line: #d8dee4;
  --primary: #1f4e79;
  --primary-text: #ffffff;
  --up: #1565c0;
  --stop: #c62828;
  --down: #b26a00;
  --ok-bg: #e8f5e9; --ok-text: #1b5e20;
  --err-bg: #fdecea; --err-text: #8e1c1c;
  --warn-bg: #fff4e0; --warn-text: #7a4a00;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12171d; --surface: #1c232b; --text: #e6edf3; --muted: #9aa8b6; --line: #2f3a46;
    --primary: #5c9ddb; --primary-text: #0b1520;
    --up: #4a90e2; --stop: #ef5350; --down: #e0a030;
    --ok-bg: #16301b; --ok-text: #a5d6a7; --err-bg: #3a1717; --err-text: #ffb4ab; --warn-bg: #3a2a10; --warn-text: #ffd590;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
[hidden] { display: none !important; }
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; }
.top-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.who { color: var(--muted); font-size: 15px; }
main { max-width: 560px; margin: 0 auto; padding: 16px; }
.loading { text-align: center; color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 0 0 16px; }
.narrow { max-width: 420px; margin: 24px auto; }
h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 18px; margin: 16px 0 8px; }
h2:first-child { margin-top: 0; }
label { display: block; margin: 0 0 12px; font-weight: 600; }
label input:not([type=checkbox]), label select, .filter-row input, .filter-row select {
  display: block; width: 100%; margin-top: 4px; padding: 12px; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
}
.filter-row input, .filter-row select { width: auto; flex: 1 1 140px; margin: 0; padding: 8px 10px; }
label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
label.check input { width: 22px; height: 22px; margin: 2px 0 0; flex: none; }
label.check.inline { margin: 0; align-items: center; }
fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 12px; padding: 12px; }
legend { font-weight: 600; padding: 0 4px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 48px; padding: 10px 18px;
  font: inherit; font-weight: 600; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--text);
  cursor: pointer; text-decoration: none;
}
.btn.primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
.btn.ghost { background: transparent; }
.btn.small { min-height: 40px; padding: 6px 12px; font-size: 15px; }
.btn.block { width: 100%; margin-top: 8px; }
.btn.danger { color: var(--stop); border-color: var(--stop); }
.btn:disabled { opacity: .55; cursor: default; }
.link { background: none; border: 0; padding: 4px; font: inherit; color: var(--primary); text-decoration: underline; cursor: pointer; min-height: 40px; }
.msg { min-height: 1.4em; margin: 4px 0 8px; color: var(--err-text); }
.msg.ok { color: var(--ok-text); }
.hint { color: var(--muted); font-size: 15px; }
.muted { color: var(--muted); font-size: 14px; }
.center { text-align: center; }

.snap { padding: 0; overflow: hidden; }
.snap-frame { position: relative; aspect-ratio: 16 / 9; background: #000; display: grid; place-items: center; overflow: hidden; }
.snap-frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; display: block; }
.snap-empty { color: #cfd8dc; margin: 0; padding: 16px; text-align: center; font-size: 15px; }
.snap-bar { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; gap: 8px; }

.geo { margin: 0 0 12px; padding: 10px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); font-size: 15px; }
.geo.ok { background: var(--ok-bg); color: var(--ok-text); border-color: transparent; }
.geo.bad { background: var(--warn-bg); color: var(--warn-text); border-color: transparent; }

.door-buttons { display: grid; gap: 12px; margin-bottom: 16px; }
.door {
  min-height: 88px; border: 0; border-radius: 18px; color: #fff; font: inherit; font-size: 26px; font-weight: 800; letter-spacing: 4px;
  display: flex; align-items: center; justify-content: center; gap: 12px; cursor: pointer; box-shadow: 0 2px 0 rgba(0,0,0,.15);
}
.door .ico { font-size: 22px; letter-spacing: 0; }
.door.up { background: var(--up); }
.door.stop { background: var(--stop); min-height: 104px; font-size: 30px; }
.door.down { background: var(--down); }
.door:disabled { opacity: .5; }
.door:active:not(:disabled) { transform: translateY(1px); box-shadow: none; }

.result { padding: 14px 16px; border-radius: 12px; margin: 0 0 16px; font-weight: 600; }
.result.ok { background: var(--ok-bg); color: var(--ok-text); }
.result.err { background: var(--err-bg); color: var(--err-text); }
.result.wait { background: var(--surface); border: 1px solid var(--line); }
.result small { display: block; font-weight: 400; margin-top: 4px; }

summary { cursor: pointer; font-weight: 600; min-height: 32px; }
.primary-summary { color: var(--primary); }
.events { list-style: none; margin: 8px 0 0; padding: 0; }
.events li { padding: 10px 0; border-top: 1px solid var(--line); font-size: 15px; }
.events li:first-child { border-top: 0; }
.events .t { color: var(--muted); font-size: 13px; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--bg); border: 1px solid var(--line); }
.badge.ok { background: var(--ok-bg); color: var(--ok-text); border-color: transparent; }
.badge.err { background: var(--err-bg); color: var(--err-text); border-color: transparent; }
.badge.warn { background: var(--warn-bg); color: var(--warn-text); border-color: transparent; }

.tabs { display: flex; gap: 4px; overflow-x: auto; margin: 0 0 16px; border-bottom: 1px solid var(--line); }
.tabs button { flex: none; background: none; border: 0; border-bottom: 3px solid transparent; padding: 10px 12px; font: inherit; color: var(--muted); cursor: pointer; min-height: 44px; }
.tabs button[aria-selected="true"] { color: var(--text); border-color: var(--primary); font-weight: 700; }
.filter-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 0 0 12px; }
.users { list-style: none; margin: 0; padding: 0; }
.users li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.users li.off { opacity: .65; }
.users .name { font-weight: 700; }
.users .meta { color: var(--muted); font-size: 14px; margin: 2px 0 8px; }
.users .acts { display: flex; flex-wrap: wrap; gap: 8px; }

dialog { border: 0; border-radius: 16px; padding: 20px; width: min(92vw, 420px); background: var(--surface); color: var(--text); }
dialog::backdrop { background: rgba(0,0,0,.5); }
.dlg-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }
.dlg-actions .btn { flex: 1; }
.temp-pw { font: 700 26px/1.3 ui-monospace, Menlo, monospace; letter-spacing: 2px; text-align: center; padding: 12px; background: var(--bg); border-radius: 10px; user-select: all; word-break: break-all; }