:root {
    --bg: #0f1115; --card: #181b22; --fg: #e8e8e8; --muted: #8a90a0;
    --temp: #ff7a45; --hum: #4fa3ff; --grid: #2a2e38;
  }
  @media (prefers-color-scheme: light) {
    :root { --bg: #f4f5f7; --card: #fff; --fg: #1a1a1a; --muted: #667; --grid: #e3e5ea; }
  }
  * { box-sizing: border-box; }
  body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.4 -apple-system, system-ui, sans-serif; }
  main { max-width: 960px; margin: 0 auto; padding: 24px 16px; }
  header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; }
  h1 { font-size: 18px; margin: 0; font-weight: 600; }
  .muted { color: var(--muted); font-size: 14px; }
  .now { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 20px 0; }
  .card { background: var(--card); border-radius: 12px; padding: 16px 20px; }
  .card .label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }
  .card .value { font-size: clamp(30px, 5vw, 44px); font-weight: 600; line-height: 1.1; margin-top: 4px; }
  .card.temp .value { color: var(--temp); } .card.hum .value { color: var(--hum); }
  .controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
  select, button { background: var(--card); color: var(--fg); border: 1px solid var(--grid); border-radius: 8px; padding: 6px 10px; font: inherit; cursor: pointer; }
  button.active { border-color: var(--temp); }
  .chart { background: var(--card); border-radius: 12px; padding: 12px 8px 4px; height: 340px; position: relative; }
  .empty { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); }
  #status { min-height: 1.2em; }