:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --band: rgba(12, 163, 12, 0.08);
  --low: #d03b3b;
  --high: #c25e00;
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100;
  --s5: #e87ba4; --s6: #008300; --s7: #4a3aa7;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --band: rgba(12, 163, 12, 0.14);
    --low: #e66767;
    --high: #ec835a;
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
    --s5: #d55181; --s6: #008300; --s7: #9085e9;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --text: #ffffff; --text-2: #c3c2b7;
  --muted: #898781; --grid: #2c2c2a; --axis: #383835; --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5; --band: rgba(12, 163, 12, 0.14); --low: #e66767; --high: #ec835a;
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
  --s5: #d55181; --s6: #008300; --s7: #9085e9;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
.hidden { display: none !important; }
.muted { color: var(--text-2); }
.small { font-size: 13px; margin: 0 0 12px; }
.error { color: var(--low); min-height: 1.5em; margin: 0; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }

button { font: inherit; cursor: pointer; border-radius: 8px; }
button.primary { background: var(--accent); color: var(--accent-ink); border: 0; padding: 10px 16px; font-weight: 600; }
button.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); padding: 6px 12px; }
button.link { background: none; border: 0; color: var(--accent); padding: 4px; }
input {
  font: inherit; color: var(--text); background: var(--page);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; width: 100%;
}

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.card h2 { font-size: 16px; margin: 0 0 4px; }

.auth { display: grid; place-items: center; padding: 48px 16px; }
.auth-card { width: 100%; max-width: 380px; display: grid; gap: 12px; }
.auth-card label { display: grid; gap: 4px; font-size: 14px; color: var(--text-2); }

.dash { max-width: 1100px; margin: 0 auto; padding: 16px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; background: var(--surface); color: var(--text); padding: 6px 12px; }
.seg button + button { border-left: 1px solid var(--border); }
.seg button.active { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.date-input { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text-2); }
.date-input input { width: auto; padding: 5px 8px; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; }
.tile .label { font-size: 13px; color: var(--text-2); }
.tile .value { font-size: 28px; font-weight: 600; }
.tile .unit { font-size: 13px; color: var(--muted); margin-left: 4px; font-weight: 400; }

.chart-box { position: relative; height: 280px; }
.chart-box.tall { height: 340px; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; font-size: 14px; }
th, td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th { color: var(--text-2); font-weight: 500; font-size: 13px; }
th:first-child, td:first-child, td.note { text-align: left; }
td.note { white-space: normal; min-width: 160px; color: var(--text-2); }
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--page); }
tbody tr.selected { outline: 2px solid var(--accent); outline-offset: -2px; }
td.low { color: var(--low); font-weight: 600; }
td.high { color: var(--high); font-weight: 600; }
td.na { color: var(--axis); }
/* Time of the measurement, under the value. */
td .time { display: block; font-size: 12px; font-weight: 400; color: var(--muted); }

.banner {
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: 8px; padding: 10px 14px; margin: 0 0 16px; color: var(--text-2);
}
.banner strong { color: var(--text); }

select {
  font: inherit; color: var(--text); background: var(--page);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
}
.lang-select { padding: 6px 8px; }

dialog {
  width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 64px);
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 12px; padding: 16px;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.4); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.dialog-head h2 { font-size: 16px; margin: 0; }
.share-form { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: end; margin-bottom: 16px; }
.share-form label { display: grid; gap: 4px; font-size: 13px; color: var(--text-2); }
.share-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.share-list li { border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; display: grid; gap: 6px; }
.share-list .meta { font-size: 13px; color: var(--text-2); }
.share-list .row { display: flex; gap: 6px; }
.share-list input { font-size: 13px; }
.share-list .expired { color: var(--low); }
button.danger { color: var(--low); }

@media (max-width: 600px) {
  .share-form { grid-template-columns: 1fr; }
  .chart-box.tall { height: 280px; }
  .tile .value { font-size: 22px; }
}