:root {
  --bg: #f1f5f9; --card: #fff; --text: #0f172a; --muted: #64748b; --line: #e2e8f0;
  --on: #16a34a; --off: #94a3b8; --warn: #d97706; --bad: #dc2626; --accent: #2563eb; --temp: #ea580c; --hum: #0284c7;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1120; --card: #111827; --text: #e5e7eb; --muted: #94a3b8; --line: #1f2937; --temp: #fb923c; --hum: #38bdf8; color-scheme: dark; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
  max-width: 600px; margin-inline: auto;
}
header { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-block: 16px; }
h1 { font-size: 1.3rem; margin: 0; }
h2 { font-size: 1rem; margin: 0; }
.pills { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.pill { font-size: .8rem; padding: 4px 10px; border-radius: 999px; background: var(--line); white-space: nowrap; }
.pill.online { background: var(--on); color: #fff; }
.pill.offline { background: var(--bad); color: #fff; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin-bottom: 12px; }
.row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.climate { display: flex; align-items: baseline; gap: 24px; flex-wrap: wrap; margin: 4px 0 8px; }
.big { font-size: 3rem; font-weight: 600; line-height: 1; color: var(--temp); }
.mid { font-size: 1.6rem; font-weight: 600; line-height: 1; color: var(--hum); }
.unit { color: var(--muted); margin-left: 6px; font-size: .95rem; }
.hint { color: var(--muted); font-size: .85rem; }
.hint.warn { color: var(--warn); }
.hint.pending { color: var(--warn); }
.ranges { display: flex; gap: 4px; }
.ranges button { font: inherit; font-size: .8rem; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); background: none; color: var(--muted); cursor: pointer; }
.ranges button.active { background: var(--text); color: var(--card); border-color: var(--text); }
#chart { width: 100%; height: 180px; display: block; margin-top: 6px; }
#chart .grid { stroke: var(--line); stroke-width: 1; }
#chart .temp { fill: none; stroke: var(--temp); stroke-width: 2; vector-effect: non-scaling-stroke; }
#chart .hum { fill: none; stroke: var(--hum); stroke-width: 1.5; stroke-dasharray: 4 3; vector-effect: non-scaling-stroke; opacity: .8; }
#chart .label { fill: var(--muted); font-size: 11px; }
#chart .empty { fill: var(--muted); font-size: 13px; }
dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0 0 10px; font-size: .95rem; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }
summary { font-weight: 600; cursor: pointer; }
details dl { margin-top: 10px; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button { font: inherit; }
.buttons button { padding: 10px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); cursor: pointer; }
.buttons button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.buttons button.danger { border-color: var(--bad); color: var(--bad); }
.buttons button[data-confirm] { border-color: var(--warn); }
.buttons button.armed { background: var(--warn); color: #fff; border-color: var(--warn); }
.buttons button:disabled { opacity: .5; cursor: wait; }
.color { display: inline-flex; align-items: center; gap: 6px; font-size: .9rem; color: var(--muted); }
.color input { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 8px; padding: 2px; background: var(--bg); cursor: pointer; }
.slider { display: block; margin-top: 12px; font-size: .9rem; color: var(--muted); }
.slider input { display: block; width: 100%; margin-top: 4px; accent-color: var(--accent); }
.error { background: var(--bad); color: #fff; padding: 10px 12px; border-radius: 8px; }
footer { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: .85rem; padding-block: 16px 24px; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; }