:root {
  --bg: #ffffff;
  --fg: #1c2430;
  --muted: #5d6877;
  --line: #dfe3e8;
  --field: #f5f7f9;
  --accent: #1f6feb;
  --below: #d97706;
  --danger: #b42318;
  --shadow: 0 6px 24px rgba(16, 24, 40, 0.18);
  --dot-ring: transparent;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161b22;
    --fg: #e6edf3;
    --muted: #9aa5b1;
    --line: #2d3540;
    --field: #0f1318;
    --accent: #58a6ff;
    --below: #f0a43a;
    --danger: #ff7b72;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
    --dot-ring: #9aa5b1;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #161b22; --fg: #e6edf3; --muted: #9aa5b1; --line: #2d3540; --field: #0f1318;
  --accent: #58a6ff; --below: #f0a43a; --danger: #ff7b72; --shadow: 0 6px 24px rgba(0, 0, 0, 0.5); --dot-ring: #9aa5b1;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
#map { position: fixed; inset: 0; }

#panel {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 360px;
  max-height: calc(100% - 24px);
  overflow: auto;
  background: var(--bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
header h1 { font-size: 18px; margin: 0; letter-spacing: -0.01em; }
header .sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.place { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.pin {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 12px;
}
.pin.a { background: #16a34a; }
.maplibregl-marker.pin { width: 26px; height: 26px; border: 2px solid #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4); cursor: grab; }
.pin.b { background: #dc2626; }
input, select {
  font: inherit; color: var(--fg); background: var(--field);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.combo { position: relative; flex: 1; min-width: 0; }
.suggestions {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0; z-index: 10;
  list-style: none; margin: 0; padding: 4px; max-height: 300px; overflow: auto;
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow);
}
.suggestions li { display: flex; flex-direction: column; padding: 6px 8px; border-radius: 6px; cursor: pointer; }
.suggestions li[aria-selected="true"], .suggestions li:hover { background: var(--field); }
.suggestions .label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.suggestions .sub { font-size: 12px; color: var(--muted); }
.suggestions li.local .sub::before { content: "⚓ "; }
.actions { display: flex; gap: 8px; margin-left: 30px; }
button {
  font: inherit; color: var(--fg); background: transparent; border: 1px solid var(--line);
  border-radius: 8px; padding: 4px 10px; cursor: pointer;
}
button:hover { border-color: var(--muted); }

details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 8px; }
.summary-note { font-weight: 400; color: var(--muted); font-size: 12px; margin-left: 4px; }
.summary-note::before { content: "· "; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 10px; }
.grid label { display: flex; flex-direction: column; gap: 3px; color: var(--muted); font-size: 12px; }
.unit { display: flex; align-items: center; gap: 5px; color: var(--muted); }
.access { border: 0; padding: 0; margin: 10px 0 0; display: flex; flex-direction: column; gap: 4px; }
.access legend { color: var(--muted); font-size: 12px; margin-bottom: 4px; padding: 0; }
.access label, .toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.access input, .toggle input { width: auto; margin: 0; }

#result { border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.hint { color: var(--muted); margin: 0; }
.error { color: var(--danger); margin: 0; }
.distance { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.distance small { font-size: 14px; font-weight: 500; color: var(--muted); }
dl.facts { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; margin: 8px 0 0; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; font-variant-numeric: tabular-nums; }
.below { color: var(--below); font-weight: 600; }
.limits { margin: 10px 0 0; padding: 8px 10px; background: var(--field); border-radius: 8px; }
.limits b { display: block; font-size: 12px; color: var(--muted); font-weight: 600; margin-bottom: 2px; }
ol.structures { list-style: none; margin: 10px 0 0; padding: 0; max-height: 220px; overflow: auto; }
ol.structures li {
  display: grid; grid-template-columns: 62px 12px 1fr; gap: 6px; align-items: center;
  padding: 3px 0; border-bottom: 1px solid var(--line); cursor: pointer;
}
ol.structures li:hover { background: var(--field); }
ol.structures .km { white-space: nowrap; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.lock { background: #7c3aed; }
.dot.fixed { background: #1c2430; box-shadow: 0 0 0 1px var(--dot-ring); }
.dot.movable { background: #059669; }

.key { display: flex; flex-direction: column; gap: 8px; }
.key h2 { font-size: 13px; font-weight: 600; margin: 0; }
.key-items {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 5px 12px; font-size: 12px; color: var(--muted);
}
.key-items li { display: flex; align-items: center; gap: 7px; }
.key-items .dot { flex: none; }
.k-line { flex: none; width: 22px; height: 0; border-top: 4px solid; border-radius: 2px; }
.k-line.route { border-color: #1f6feb; }
.k-line.below { border-color: #d97706; }
.k-line.access { border: 0; height: 2px; background: repeating-linear-gradient(90deg, #6b7280 0 5px, transparent 5px 9px); }
.legend { display: flex; flex-wrap: wrap; gap: 4px 10px; font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 4px; }
.legend i { width: 16px; height: 4px; border-radius: 2px; display: inline-block; }

footer { color: var(--muted); font-size: 12px; border-top: 1px solid var(--line); padding-top: 10px; }
footer a { color: inherit; }

.maplibregl-popup-content { color: #1c2430; font: 13px/1.4 system-ui, sans-serif; }

@media (max-width: 640px) {
  #panel {
    top: auto; bottom: 0; left: 0; right: 0; width: auto;
    max-height: 52%; border-radius: 12px 12px 0 0; padding: 12px 16px;
  }
}