:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --online: #22c55e;
  --stale: #eab308;
  --offline: #ef4444;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 1.5rem; background: #111827; border-bottom: 1px solid #334155;
}
.brand { font-weight: 700; }
.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
@media (min-width: 1200px) {
  .container { max-width: 1680px; }
}
.hero h1 { margin: 0 0 .5rem; }
.muted { color: var(--muted); }
.panel {
  background: var(--panel); border: 1px solid #334155;
  border-radius: 12px; padding: 1.25rem; margin: 1rem 0;
}
.narrow { max-width: 420px; margin: 3rem auto; }
.form label { display: block; margin: .75rem 0; }
.form input {
  width: 100%; margin-top: .35rem; padding: .6rem .75rem;
  border-radius: 8px; border: 1px solid #475569; background: #0f172a; color: var(--text);
}
button {
  margin-top: 1rem; padding: .65rem 1rem; border: 0; border-radius: 8px;
  background: var(--accent); color: #0f172a; font-weight: 600; cursor: pointer;
}
.error { color: var(--offline); }
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  /* Keep ~280px card width; never more than 5 across */
  .grid:not(.two) {
    grid-template-columns: repeat(
      auto-fill,
      minmax(max(280px, calc((100% - 4rem) / 5)), 1fr)
    );
  }
}
.grid.two { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  display: block; background: var(--panel); border: 1px solid #334155;
  border-radius: 12px; padding: 1rem; color: inherit;
}
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; }
.card-call {
  margin: 0; font-size: 1.35rem; font-weight: 800; line-height: 1.2;
  letter-spacing: .04em; color: var(--text); text-transform: uppercase;
}
.card-site-name {
  margin: .15rem 0 .5rem; font-size: .72rem; line-height: 1.3;
  color: var(--muted); font-weight: 500;
}
.card-station {
  margin: 0; font-size: 1.15rem; font-weight: 700; line-height: 1.25;
  letter-spacing: .01em; color: var(--text);
}
.station-label {
  margin: 0 0 .4rem 0; padding-bottom: .35rem; border-bottom: 1px solid #334155;
  font-weight: 700; font-size: .95rem; letter-spacing: .02em; color: var(--accent, #38bdf8);
}
.card-meta { font-size: .72rem; margin: .1rem 0; line-height: 1.3; }
.badge {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .04em;
  padding: .2rem .5rem; border-radius: 999px; background: #334155;
}
.status-online .badge { background: color-mix(in srgb, var(--online) 25%, #334155); color: var(--online); }
.status-stale .badge { background: color-mix(in srgb, var(--stale) 25%, #334155); color: var(--stale); }
.status-offline .badge { background: color-mix(in srgb, var(--offline) 25%, #334155); color: var(--offline); }
.kv div { display: flex; justify-content: space-between; gap: 1rem; padding: .35rem 0; border-bottom: 1px solid #334155; }
.kv dt { color: var(--muted); }
.code {
  overflow: auto; max-height: 420px; background: #0b1220; padding: 1rem;
  border-radius: 8px; font-size: .85rem;
}
.back { display: inline-block; margin-bottom: .75rem; }
.refresh-bar {
  text-align: center;
  font-size: .85rem;
  color: var(--muted);
  padding: .45rem 1rem;
  background: #111827;
  border-bottom: 1px solid #334155;
}
time.local-time { font-variant-numeric: tabular-nums; }
.relay-grid {
  display: grid;
  gap: .75rem;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  margin-top: .75rem;
}
.relay-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .2rem;
  padding: .85rem 1rem;
  border-radius: 10px;
  border: 1px solid #475569;
  background: #0f172a;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}
.relay-btn:hover:not(:disabled) { border-color: var(--accent); }
.relay-btn:disabled { opacity: .6; cursor: wait; }
.relay-btn.relay-on { border-color: color-mix(in srgb, var(--online) 50%, #475569); }
.relay-btn.relay-off { border-color: #475569; }
.relay-name { font-weight: 600; }
.relay-num, .relay-state { font-size: .85rem; color: var(--muted); text-transform: uppercase; }
.relay-btn.relay-on .relay-state { color: var(--online); }
.tabs { display: flex; gap: .25rem; margin: 1rem 0 0; border-bottom: 1px solid #334155; }
.tab-btn {
  margin: 0; background: transparent; color: var(--muted);
  border: 0; border-bottom: 2px solid transparent; border-radius: 0;
  padding: .55rem 1rem; font-weight: 600; cursor: pointer;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }
.log-controls { display: flex; flex-wrap: wrap; gap: .75rem; align-items: end; margin: .25rem 0 1rem; }
.log-controls label { display: flex; flex-direction: column; gap: .25rem; font-size: .78rem; color: var(--muted); }
.log-controls select, .log-controls input {
  padding: .45rem .55rem; border-radius: 8px; border: 1px solid #475569;
  background: #0f172a; color: var(--text);
}
.log-controls button { margin: 0; }
#log-graph { width: 100%; background: #0b1220; border: 1px solid #334155; border-radius: 8px; }
.log-table-scroll { max-height: 440px; overflow: auto; margin-top: 1rem; }
.log-table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.log-table th, .log-table td { text-align: left; padding: .4rem .55rem; border-bottom: 1px solid #334155; white-space: nowrap; }
.log-table th { color: var(--muted); position: sticky; top: 0; background: var(--panel); }
.code-chip {
  display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .03em;
  text-transform: uppercase; padding: .15rem .5rem; border-radius: 999px;
  background: #334155; color: var(--text);
}
.code-current { background: color-mix(in srgb, var(--online) 25%, #334155); color: var(--online); }
.code-outdated { background: color-mix(in srgb, var(--stale) 30%, #334155); color: var(--stale); }
.code-unknown { background: #334155; color: var(--muted); }
.code-master { background: color-mix(in srgb, var(--accent, #38bdf8) 30%, #334155); color: var(--accent, #38bdf8); font-weight: 700; }
.hardening-chip {
  display: inline-block; font-size: .68rem; font-weight: 700; letter-spacing: .03em;
  text-transform: uppercase; padding: .12rem .5rem; border-radius: 999px; cursor: default;
}
.hardening-ok { background: color-mix(in srgb, var(--online) 25%, #334155); color: var(--online); }
.hardening-warn { background: color-mix(in srgb, var(--stale) 35%, #334155); color: var(--stale); }
.hardening-unknown { background: #334155; color: var(--muted); }
.card-sdr-footer {
  margin-top: .75rem; padding-top: .65rem; border-top: 1px solid #334155;
}
.card-tower-footer {
  margin-top: .75rem; padding-top: .65rem; border-top: 1px solid #334155;
}
.card-tower-kv {
  display: grid; gap: .35rem .75rem; margin: .35rem 0 0; font-size: .82rem;
}
.card-tower-kv div { display: grid; grid-template-columns: 1fr auto; gap: .5rem; align-items: baseline; }
.card-tower-kv dt { margin: 0; color: var(--muted); font-weight: 600; }
.card-tower-kv dd { margin: 0; text-align: right; }
.sdr-kv {
  display: grid; gap: .35rem .75rem; margin: .35rem 0 0; font-size: .82rem;
}
.sdr-kv div { display: grid; grid-template-columns: 5.5rem 1fr; gap: .5rem; align-items: baseline; }
.sdr-kv dt { margin: 0; color: var(--muted); font-weight: 600; }
.sdr-kv dd { margin: 0; color: var(--text); }
.sdr-rds { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sdr-controls {
  display: flex; flex-wrap: wrap; gap: .65rem; align-items: center; margin-top: .75rem;
}
.sdr-controls button { margin-top: 0; }
.sdr-audio { width: min(100%, 28rem); margin-top: .25rem; }
.sdr-playback-status { font-size: .85rem; font-weight: 600; color: var(--online); }
.panel-subhead {
  margin: 1rem 0 .5rem; font-size: .9rem; font-weight: 700; color: var(--muted);
  border-top: 1px solid #334155; padding-top: .85rem;
}
.tower-lights-kv .tower-light-ok dd { color: var(--online); font-weight: 600; }
.tower-lights-kv .tower-light-bad dd { color: var(--offline); font-weight: 600; }
.tower-lights-kv .tower-light-unknown dd { color: var(--muted); }
.btn-secondary {
  background: #334155; color: var(--text); border: 1px solid #475569;
  margin-top: 0;
}
.btn-secondary:hover { background: #475569; }
.unit-display-list { margin-top: 1rem; }
.unit-display-row {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: .75rem 0; border-bottom: 1px solid #334155;
}
.unit-display-state { display: block; margin-top: .2rem; font-size: .85rem; }