:root {
  --bg: #f4f6f7;
  --surface: #ffffff;
  --text: #15202b;
  --muted: #5d6b78;
  --border: #dde3e8;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --ok: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;
  --track: #e7ecef;
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1418;
    --surface: #161f25;
    --text: #e6edf2;
    --muted: #93a3b0;
    --border: #2a363e;
    --accent: #2dd4bf;
    --accent-text: #062a26;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
    --track: #24313a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
[hidden] { display: none !important; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 17px; margin: 0; }
.muted { color: var(--muted); }
.error { color: var(--bad); min-height: 1.5em; margin: 0; }

button {
  font: inherit;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 7px 14px;
  cursor: pointer;
}
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.danger { background: var(--bad); border-color: var(--bad); color: #fff; font-weight: 600; }
button.ghost { background: transparent; }
button.link { border: 0; background: none; color: var(--accent); padding: 4px 0; }
.danger-text { color: var(--bad); }
input {
  font: inherit;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  min-width: 0;
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand img { width: 28px; height: 28px; }

.auth { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.auth-card { width: min(380px, 100%); display: grid; gap: 12px; }
.auth-card label { display: grid; gap: 4px; font-weight: 500; }

.topbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 2;
}
.tabs { display: flex; gap: 4px; flex: 1; }
.tabs button { border: 0; background: none; color: var(--muted); }
.tabs button[aria-selected="true"] { color: var(--text); background: var(--track); font-weight: 600; }
.who { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; }
.badge { background: var(--bad); color: #fff; border-radius: 99px; font-size: 12px; padding: 0 7px; margin-left: 4px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bad); display: inline-block; }
.dot.on { background: var(--ok); }

main { max-width: 1200px; margin: 0 auto; padding: 24px; }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 8px; }
.pair { display: flex; gap: 8px; flex-wrap: wrap; }
.route { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; margin-left: auto; }
select { font: inherit; padding: 7px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); max-width: 100%; }
.small { font-size: 13px; font-variant-numeric: tabular-nums; }
.pair input { width: 230px; text-transform: uppercase; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 16px; }
.empty ol { padding-left: 20px; margin-bottom: 0; }

.device { display: grid; gap: 14px; }
.device.offline { opacity: .72; }
.device-head { display: flex; justify-content: space-between; gap: 12px; align-items: start; }
.pill { font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 99px; background: var(--track); color: var(--muted); white-space: nowrap; }
.pill.ok { color: var(--ok); }
.pill.live { background: var(--bad); color: #fff; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin: 0; }
.stats dt { font-size: 12px; color: var(--muted); }
.stats dd { margin: 0; font-weight: 500; }
.state-armed { color: var(--ok); }
.state-streaming { color: var(--bad); }
.state-off { color: var(--muted); }
.meters { display: grid; gap: 6px; }
.meter-row { display: grid; grid-template-columns: 64px 1fr 64px; align-items: center; gap: 8px; font-size: 13px; }
.meter-row b { text-align: right; font-variant-numeric: tabular-nums; }
.meter { height: 8px; background: var(--track); border-radius: 99px; overflow: hidden; }
.meter i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .4s; }
.meter i.warn { background: var(--warn); }
.meter i.bad { background: var(--bad); }
.spark { width: 100%; height: 48px; }
.spark-label { font-size: 12px; margin-top: -10px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }

.listen { margin-bottom: 24px; border-color: var(--accent); }
.listen-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.listen-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.eyebrow { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); font-weight: 700; }
.volume { display: flex; gap: 8px; align-items: center; font-size: 14px; }
#spectrum { width: 100%; height: 160px; background: var(--bg); border-radius: 8px; display: block; }
.spectrum-axis { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); margin-top: 4px; }
.banner { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--text); border-radius: 8px; padding: 10px 12px; margin-bottom: 12px; }

.alert { display: grid; gap: 10px; margin-bottom: 12px; border-left: 4px solid var(--warn); }
.alert.critical { border-left-color: var(--bad); }
.alert.info { border-left-color: var(--accent); }
.alert.acked { opacity: .65; }
.alert-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
.sev { font-size: 12px; font-weight: 700; text-transform: uppercase; }
.sev.critical { color: var(--bad); }
.sev.warning { color: var(--warn); }
.features { display: flex; flex-wrap: wrap; gap: 6px; }
.features span { font-size: 12px; background: var(--track); padding: 2px 8px; border-radius: 6px; font-variant-numeric: tabular-nums; }
.explanation { white-space: pre-wrap; background: var(--bg); border-radius: 8px; padding: 12px; margin: 0; font-size: 14px; }
.check { display: flex; gap: 6px; align-items: center; color: var(--muted); }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; }
td code { font-size: 12px; color: var(--muted); word-break: break-word; }

@media (max-width: 640px) {
  .topbar { padding: 10px 16px; }
  main { padding: 16px; }
  .grid { grid-template-columns: 1fr; }
  .pair input { width: 100%; }
  .pair { width: 100%; }
  .route { margin-left: 0; width: 100%; flex-wrap: wrap; }
}