:root {
  --bg: #f4f6f3;
  --card: #ffffff;
  --text: #1d2a1f;
  --muted: #5f6b61;
  --line: #dde3dc;
  --accent: #2e7d32;
  --accent-text: #ffffff;
  --warn: #b26a00;
  --bad: #c62828;
  --good: #2e7d32;
  --water: #1565c0;
  --chip: #eef3ec;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121612;
    --card: #1b211c;
    --text: #e4ebe3;
    --muted: #9aa79b;
    --line: #2d362e;
    --accent: #66bb6a;
    --accent-text: #0d1a0e;
    --warn: #f0a640;
    --bad: #ef5350;
    --good: #66bb6a;
    --water: #64b5f6;
    --chip: #253026;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--accent); }
h1, h2, h3 { margin: 0 0 0.5em; line-height: 1.2; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.hidden { display: none !important; }

.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; padding-top: max(10px, env(safe-area-inset-top));
  background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); white-space: nowrap; }
#topnav { display: flex; gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
#topnav a { text-decoration: none; color: var(--muted); }
#topnav a.on { color: var(--accent); font-weight: 600; }

main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.banner { padding: 10px 16px; background: var(--bad); color: #fff; text-align: center; }
.banner.info { background: var(--water); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin-bottom: 14px; box-shadow: var(--shadow);
}
a.card { display: block; color: inherit; text-decoration: none; }
a.card:hover { border-color: var(--accent); }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.stack > * + * { margin-top: 8px; }

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; background: var(--muted); flex: none; }
.dot.on { background: var(--good); }
.dot.off { background: var(--bad); }

.chip { display: inline-block; padding: 2px 9px; border-radius: 999px; background: var(--chip); font-size: 0.82rem; }
.chip.bad { background: var(--bad); color: #fff; }
.chip.warn { background: var(--warn); color: #fff; }
.chip.water { background: var(--water); color: #fff; }
.chip.good { background: var(--good); color: var(--accent-text); }

.stat { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; }
.stat dt { color: var(--muted); }
.stat dd { margin: 0; font-variant-numeric: tabular-nums; }
.big { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }

button, .btn {
  font: inherit; cursor: pointer; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); padding: 8px 14px; text-decoration: none; display: inline-block;
}
button.primary, .btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { background: var(--bad); color: #fff; border-color: var(--bad); }
button:disabled { opacity: 0.5; cursor: default; }
button.link { border: none; background: none; color: var(--accent); padding: 0; }

input, select {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 10px; min-width: 0;
}
input[type="number"] { width: 110px; }
input[type="checkbox"] { width: 18px; height: 18px; }
label.field { display: grid; gap: 4px; margin-bottom: 10px; }
label.field > span { color: var(--muted); font-size: 0.9rem; }
.form-grid { display: grid; gap: 10px 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.msg { min-height: 1.4em; font-size: 0.9rem; }
.msg.err { color: var(--bad); }
.msg.ok { color: var(--good); }

.tabs { display: flex; gap: 4px; overflow-x: auto; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.tabs a {
  padding: 8px 12px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap;
}
.tabs a.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: none; border-radius: 0; padding: 6px 12px; }
.seg button.on { background: var(--accent); color: var(--accent-text); }

.chart { width: 100%; min-height: 220px; }
.chart-title { margin: 6px 0 2px; font-weight: 600; }
.u-legend { font-size: 0.82rem; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; cursor: pointer; user-select: none; white-space: nowrap; }
th.sorted::after { content: " ▾"; }
th.sorted.asc::after { content: " ▴"; }
.table-wrap { overflow-x: auto; }

.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 9.5em 1fr; gap: 10px; padding: 7px 0; border-bottom: 1px solid var(--line); }
.timeline time { color: var(--muted); font-variant-numeric: tabular-nums; }
.tag-late { color: var(--muted); font-size: 0.8rem; }

.login { max-width: 360px; margin: 8vh auto; }
.pred-value { font-size: 1.3rem; font-weight: 700; }

@media (max-width: 600px) {
  main { padding: 12px; }
  .timeline li { grid-template-columns: 1fr; gap: 2px; }
  input[type="number"] { width: 100%; }
}