:root {
  --bg: #f4f6f4; --card: #fff; --ink: #1d2a24; --muted: #6b7a72; --line: #e2e8e4;
  --brand: #1f6f4a; --warn: #f2b33d; --bad: #d9534f;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121815; --card: #1b231f; --ink: #e6ede9; --muted: #93a39a; --line: #2b3631; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }
h1 { font-size: 20px; margin: 0; color: var(--brand); display: inline-block; margin-right: 10px; }
h2 { font-size: 15px; margin: 0 0 8px; font-weight: 600; }
.muted { color: var(--muted); } .small { font-size: 12.5px; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
main { max-width: 1100px; margin: 0 auto; padding: 12px 16px 40px; }
select, input, button { font: inherit; }
select, input { padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); }
button { padding: 8px 14px; border: 0; border-radius: 8px; background: var(--brand); color: #fff; cursor: pointer; }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); }
.status { margin: 4px 0 12px; color: var(--muted); }
.status.bad { color: var(--bad); font-weight: 600; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-bottom: 14px; }
.tile { background: var(--card); border: 1px solid var(--line); border-left: 5px solid var(--brand); border-radius: 12px; padding: 10px 12px; display: grid; grid-template-columns: auto 1fr; align-items: baseline; column-gap: 6px; }
.tile .label { grid-column: 1 / -1; color: var(--muted); font-size: 13px; }
.tile .val { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.tile .unit { color: var(--muted); }
.tile .hint { grid-column: 1 / -1; color: var(--muted); font-size: 12px; min-height: 1em; }
.tile.warn { border-left-color: var(--warn); }
.tile.bad { border-left-color: var(--bad); } .tile.bad .val { color: var(--bad); }
.range { display: flex; gap: 6px; flex-wrap: wrap; margin: 6px 0 2px; }
.range button { background: var(--card); color: var(--ink); border: 1px solid var(--line); padding: 6px 12px; }
.range button.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin: 12px 0; }
.chart { position: relative; height: 300px; }
.login { display: grid; place-items: center; min-height: 100vh; }
.login-card { width: min(340px, 92vw); display: grid; gap: 8px; }
.login-card h1 { font-size: 26px; }
.err { color: var(--bad); margin: 0; }