:root {
  --bg: #0d1117;
  --panel: #151b23;
  --panel-2: #1b222c;
  --line: #2a3340;
  --text: #e6edf3;
  --muted: #8b98a8;
  --ok: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --info: #60a5fa;
  --off: #6b7685;
  --bar-bg: #232c38;
  --fuel: #a3e635;
  --waste: #c084fc;
  --cool: #38bdf8;
  --hcool: #fb923c;
  --energy: #34d399;
  --steam: #cbd5e1;
  --water: #3b82f6;
  --radius: 10px;
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.top {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  padding: 12px 20px;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { margin: 0; font-size: 18px; letter-spacing: 0.04em; }
.logo {
  width: 22px; height: 22px; border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, var(--ok) 0 30%, transparent 32%),
              conic-gradient(var(--ok) 0 60deg, transparent 60deg 120deg, var(--ok) 120deg 180deg, transparent 180deg 240deg, var(--ok) 240deg 300deg, transparent 300deg);
  opacity: 0.9;
}

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--panel);
  font-size: 13px;
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--off); }
.pill-ok .dot { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.pill-warn .dot { background: var(--warn); }
.pill-bad .dot { background: var(--bad); }
.pill-wait .dot { background: var(--info); animation: blink 1.2s infinite; }

.prefs { margin-left: auto; display: flex; gap: 14px; color: var(--muted); font-size: 13px; }
.prefs label { display: flex; align-items: center; gap: 6px; }
.prefs select {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--line); border-radius: 6px; padding: 3px 6px;
}

main { padding: 20px; max-width: 1500px; margin: 0 auto; }

/* facility strip */
.facility {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.facility:empty { display: none; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.card h2, .card h3 {
  margin: 0 0 10px; font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
}
.card.wide { grid-column: span 2; }
@media (max-width: 560px) { .card.wide { grid-column: auto; } }

.big { font: 600 24px/1.1 var(--mono); }
.sub { color: var(--muted); font-size: 12px; margin-top: 4px; }
.row { display: flex; justify-content: space-between; gap: 8px; padding: 2px 0; }
.row .k { color: var(--muted); }
.row .v { font-family: var(--mono); text-align: right; }

/* units */
.units {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 440px), 1fr));
  gap: 16px;
}

.unit { padding: 0; overflow: hidden; }
.unit-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--panel-2);
}
.unit-head h2 { margin: 0; font-size: 16px; text-transform: none; letter-spacing: 0; color: var(--text); }
.unit-body { padding: 14px 16px; display: grid; gap: 14px; }

.badge {
  font: 600 11px/1 var(--mono); letter-spacing: 0.06em;
  padding: 5px 9px; border-radius: 6px; border: 1px solid currentColor; white-space: nowrap;
}
.b-ok { color: var(--ok); }
.b-warn { color: var(--warn); }
.b-bad { color: var(--bad); background: rgba(248, 113, 113, 0.12); }
.b-off { color: var(--off); }
.b-info { color: var(--info); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat .label { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.stat .value { font: 600 20px/1.2 var(--mono); }
.stat .value small { font-size: 12px; color: var(--muted); font-weight: 400; }
.stat.warn .value { color: var(--warn); }
.stat.bad .value { color: var(--bad); }

.bars { display: grid; gap: 7px; }
.bar { display: grid; grid-template-columns: 120px 1fr 52px; align-items: center; gap: 10px; font-size: 12px; }
.bar .name { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar .track, .bar .fill { display: block; }
.bar .track { height: 8px; border-radius: 4px; background: var(--bar-bg); overflow: hidden; }
.bar .fill { height: 100%; border-radius: 4px; transition: width 0.6s ease; }
.bar .pct { font-family: var(--mono); text-align: right; }

.trend { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.spark { background: var(--panel-2); border-radius: 8px; padding: 8px 10px; }
.spark .label { color: var(--muted); font-size: 11px; display: flex; justify-content: space-between; }
.spark svg { display: block; width: 100%; height: 42px; margin-top: 4px; }

.subsys h3 { margin-bottom: 6px; }
.subsys-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; }
.dev { background: var(--panel-2); border-radius: 8px; padding: 8px 10px; font-size: 12px; }
.dev-title { display: flex; justify-content: space-between; font-weight: 600; margin-bottom: 4px; }
.dev .bar { grid-template-columns: 52px 1fr 40px; gap: 6px; }

.alarms { display: flex; flex-wrap: wrap; gap: 6px; }
.alarm { font-size: 11px; padding: 3px 8px; border-radius: 999px; border: 1px solid currentColor; }
.alarm.tripped { color: var(--bad); animation: blink 1s steps(2, start) infinite; }
.alarm.acked { color: var(--bad); }
.alarm.ringback { color: var(--warn); }
.none { color: var(--muted); font-size: 12px; }

.empty { color: var(--muted); text-align: center; padding: 60px 20px; font-size: 15px; }

.foot { padding: 16px 20px 28px; color: var(--muted); font-size: 12px; text-align: center; }

.stale main { opacity: 0.55; filter: grayscale(0.6); transition: opacity 0.3s; }

@keyframes blink { 50% { opacity: 0.35; } }

@media (max-width: 560px) {
  main { padding: 16px; }
  .top { padding: 10px 16px; }
  .prefs { margin-left: 0; }
  .bar { grid-template-columns: 96px 1fr 46px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .trend { grid-template-columns: 1fr; }
}