:root {
  --bg: #101318;
  --panel: #171b21;
  --panel-border: #262b33;
  --text: #e6e8eb;
  --text-dim: #8b93a1;
  --green: #3dd68c;
  --yellow: #f0c14b;
  --red: #f0554b;
  --accent: #4fd1c5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--panel-border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.topbar-title h1 { margin: 0; font-size: 1.25rem; letter-spacing: 0.02em; }
.subtitle { color: var(--text-dim); font-size: 0.8rem; }

.status { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-dim); }

.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--red); box-shadow: 0 0 6px var(--red);
  transition: background .2s, box-shadow .2s;
}
.dot.live { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.stale { background: var(--yellow); box-shadow: 0 0 6px var(--yellow); }

.lastUpdate { color: var(--text-dim); font-size: 0.75rem; }

main { padding: 20px; max-width: 1200px; margin: 0 auto; }

.section { margin-bottom: 28px; }

.section-title { font-size: 1rem; color: var(--text-dim); margin: 0 0 12px 4px; font-weight: 600; }
.subsection-title { font-size: 0.85rem; color: var(--text-dim); margin: 18px 0 8px 4px; font-weight: 600; }

.hist-header {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px; margin-bottom: 12px;
}
.range-selector { display: flex; gap: 6px; }
.range-selector button {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  cursor: pointer;
}
.range-selector button.active {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

.grid { display: grid; gap: 14px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); margin-top: 14px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
  main { padding: 12px; }
  .topbar { padding: 12px; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 14px 16px;
}

.card-title {
  color: var(--text-dim); font-size: 0.8rem; margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}

.big-value { font-size: 2rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.big-value.small { font-size: 1.5rem; }

.gauge-card { text-align: center; }
.gauge { width: 100%; max-width: 160px; }
.gauge-bg { fill: none; stroke: #262b33; stroke-width: 10; stroke-linecap: round; }
.gauge-value {
  fill: none; stroke: var(--green); stroke-width: 10; stroke-linecap: round;
  stroke-dasharray: 157; stroke-dashoffset: 157;
  transition: stroke-dashoffset .4s ease, stroke .4s ease;
}
.gauge-readout { margin-top: -8px; font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.chart-card canvas { width: 100%; display: block; }

.legend { display: flex; gap: 14px; margin-top: 8px; font-size: 0.75rem; color: var(--text-dim); }
.sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }

pre#raw-json {
  white-space: pre-wrap; word-break: break-word; font-size: 0.78rem;
  color: var(--text-dim); margin: 0; max-height: 220px; overflow: auto;
}

footer { text-align: center; color: var(--text-dim); font-size: 0.75rem; padding: 20px; }

.value-red { color: var(--red); }
.value-yellow { color: var(--yellow); }
.value-green { color: var(--green); }