:root {
  --bg: #f4f4f2; --card: #fff; --ink: #1d1d1b; --muted: #6b6b66; --line: #ddddd8;
  --accent: #8a1111; --ok: #1f7a3a; --warn: #a15c00;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.45 system-ui, sans-serif; }
main { max-width: 960px; margin: 0 auto; padding: 24px 16px 64px; }
main.narrow { max-width: 420px; }
h1 { font-size: 1.5rem; margin: 0 0 16px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
header h1 { margin: 0; }
header nav { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
label { display: block; margin-bottom: 12px; font-size: .95rem; }
input, select { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; font: inherit; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
input[type=checkbox] { display: inline; width: auto; margin: 0 6px 0 0; }
input[type=range] { padding: 0; }
button { font: inherit; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer; }
button.ghost { background: #fff; color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
a { color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 0 16px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.error { color: var(--accent); font-weight: 600; }
.muted { color: var(--muted); font-size: .9rem; }
.big { font-size: 3rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1; }
.badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.badge { padding: 2px 10px; border-radius: 999px; font-size: .85rem; border: 1px solid var(--line); color: var(--muted); }
.badge.on { border-color: var(--ok); color: var(--ok); font-weight: 600; }
.badge.alert { border-color: var(--warn); color: var(--warn); font-weight: 600; }
.meter { position: relative; height: 28px; background: #eee; border-radius: 6px; overflow: hidden; }
.meter .fill { position: absolute; inset: 0; transform-origin: left; transform: scaleX(0); background: linear-gradient(90deg, #4a7a3a, #c9a227 60%, #8a1111); transition: transform 90ms linear; }
.meter .mark { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); }
.meter .mark span { position: absolute; top: 2px; left: 4px; font-size: .75rem; white-space: nowrap; }
code { font-size: .9rem; word-break: break-all; }