:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --fg: #1e1e1c;
  --muted: #6b6a66;
  --line: #e6e4de;
  --accent: #2b6cb0;
  --c-bird: #3a9d5d;
  --c-bell: #d99a2b;
  --c-train: #3f6fd1;
  --c-siren: #d64545;
  --ok: #2f855a;
  --bad: #c53030;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --card: #1f1f1d;
    --fg: #ecebe6;
    --muted: #9c9a93;
    --line: #2d2d2a;
    --accent: #7cb2f0;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 1100px; margin: 0 auto; padding: 0 16px 32px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 16px; }

.top {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  background: var(--card);
}
.brand { font-weight: 700; font-size: 18px; color: var(--fg); letter-spacing: 0.02em; }
.top nav { display: flex; gap: 4px; }
.top nav a { padding: 6px 10px; border-radius: 6px; color: var(--muted); }
.top nav a.active, .top nav a:hover { color: var(--fg); background: var(--bg); text-decoration: none; }

.toolbar { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; margin: 20px 0 12px; }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 15px; margin: 0 0 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); display: flex; justify-content: space-between; }
h2 .more { font-weight: normal; text-transform: none; letter-spacing: 0; font-size: 13px; }

.ranges { display: flex; gap: 4px; flex-wrap: wrap; }
.ranges a { padding: 5px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 13px; background: var(--card); }
.ranges a.active { color: var(--fg); border-color: var(--fg); }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile { display: block; background: var(--card); border: 1px solid var(--line); border-left: 5px solid var(--line); border-radius: 8px; padding: 12px 14px; color: var(--fg); }
.tile:hover { text-decoration: none; border-color: var(--muted); }
.tile-bird { border-left-color: var(--c-bird); }
.tile-bell { border-left-color: var(--c-bell); }
.tile-train { border-left-color: var(--c-train); }
.tile-siren { border-left-color: var(--c-siren); }
.tile-label { text-transform: capitalize; color: var(--muted); font-size: 13px; }
.tile-value { font-size: 30px; font-weight: 700; line-height: 1.2; }
.tile-sub { color: var(--muted); font-size: 13px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; margin-bottom: 16px; }
.columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.chart-wrap { position: relative; height: 260px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
tr:last-child td { border-bottom: 0; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.nowrap { white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.sci { display: block; font-style: italic; font-size: 12px; }
.table-wrap { overflow-x: auto; }
audio { height: 30px; max-width: 220px; }

.chip { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; color: #fff; }
.chip-bird { background: var(--c-bird); }
.chip-bell { background: var(--c-bell); }
.chip-train { background: var(--c-train); }
.chip-siren { background: var(--c-siren); }

.filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.filters label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.filters input, .filters select { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); }
.filters button { font: inherit; padding: 7px 14px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; }
.pager { display: flex; justify-content: space-between; gap: 12px; padding-top: 12px; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; font-size: 14px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.ok { color: var(--ok); font-weight: 600; }
.bad { color: var(--bad); font-weight: 600; }