:root {
  --bg: #14171c;
  --panel: #1d2229;
  --fg: #e7ebf0;
  --muted: #8b97a5;
  --temp: #ff7043;
  --hum: #42a5f5;
  --ok: #2e7d32;
  --warn: #b8860b;
  --bad: #c62828;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid #2a3038;
}
header h1 { font-size: 18px; margin: 0; flex: 0 0 auto; }
.banner {
  flex: 1 1 auto;
  min-width: 180px;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  background: #2a3038;
  color: var(--muted);
}
.banner.ok   { background: var(--ok);   color: #fff; }
.banner.warn { background: var(--warn); color: #fff; }
.banner.bad  { background: var(--bad);  color: #fff; }
.ranges { display: flex; gap: 4px; }
.ranges button {
  background: var(--panel);
  color: var(--fg);
  border: 1px solid #2a3038;
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
}
.ranges button.active { background: var(--hum); color: #fff; border-color: var(--hum); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  padding: 16px 20px;
}
.card {
  background: var(--panel);
  border-radius: 10px;
  padding: 14px 16px;
}
.card.stale { opacity: 0.5; }
.card .label { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card .temp { font-size: 30px; font-weight: 600; color: var(--temp); }
.card .hum  { font-size: 15px; color: var(--hum); margin-top: 4px; }

.block { padding: 4px 0 8px; }
.block h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 22px 20px 10px;
  color: var(--fg);
}
.charts {
  padding: 0 20px 12px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}
.chart-host-full { padding: 0 20px 12px; }
.chart-wrap {
  background: var(--panel);
  border-radius: 10px;
  padding: 12px 12px 4px;
  overflow: hidden;
}
.chart-wrap h3 { margin: 0 0 8px 4px; font-size: 14px; font-weight: 600; }
.u-legend { font-size: 12px; }