:root {
  --bg: #eef1f5;
  --surface: #ffffff;
  --surface-2: #e3e8ee;
  --ink: #1b2430;
  --ink-muted: #5c6b7a;
  --border: #d2d9e1;
  --chrome: #33465c;
  --chrome-ink: #f3f6fa;
  --pl: #2c5c94;
  --ul: #c98a1f;
  --um: #1f8a72;
  --none: #b7bfc8;
  --seq-1: #ddd0ec;
  --seq-2: #a374c4;
  --seq-3: #5b2a86;
  --shadow: 0 8px 24px rgba(27, 36, 48, 0.14);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10141a; --surface: #171c24; --surface-2: #1e2530;
    --ink: #e7ecf2; --ink-muted: #8ca0b3; --border: #2a3240;
    --chrome: #0d1117; --chrome-ink: #e7ecf2;
    --pl: #5588c8; --ul: #bd7d28; --um: #28a082; --none: #4a5361;
    --seq-1: #3a2f4a; --seq-2: #7a4fa8; --seq-3: #c9a8e0;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
  }
}
:root[data-theme="dark"] {
  --bg: #10141a; --surface: #171c24; --surface-2: #1e2530;
  --ink: #e7ecf2; --ink-muted: #8ca0b3; --border: #2a3240;
  --chrome: #0d1117; --chrome-ink: #e7ecf2;
  --pl: #5588c8; --ul: #bd7d28; --um: #28a082; --none: #4a5361;
  --seq-1: #3a2f4a; --seq-2: #7a4fa8; --seq-3: #c9a8e0;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

header { background: var(--chrome); color: var(--chrome-ink); padding: 16px 28px 0; flex: none; position: relative; }

.lang-toggle {
  all: unset; cursor: pointer; font-family: "IBM Plex Mono", monospace; font-weight: 600;
  font-size: 0.72rem; padding: 4px 9px; border-radius: 6px; border: 1px solid rgba(255, 255, 255, 0.25);
  color: #cfe0f0; position: absolute; top: 14px; right: 20px;
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.08); }
.lang-toggle:focus-visible { outline: 2px solid var(--pl); outline-offset: 2px; }

header h1 {
  font-family: "Archivo", system-ui, sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  margin: 0 0 4px;
  text-wrap: balance;
}
header p { margin: 0 0 12px; color: #b9c4d1; font-size: 0.86rem; max-width: 68ch; }
header a { color: #cfe0f0; }

.citytabs { display: flex; gap: 2px; overflow-x: auto; }
.citytabs button {
  all: unset; cursor: pointer; font-family: "IBM Plex Sans", sans-serif; font-weight: 600;
  font-size: 0.86rem; padding: 9px 18px; color: #c3cddb; white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.citytabs button:focus-visible { outline: 2px solid var(--pl); outline-offset: -2px; }
.citytabs button.active { color: var(--chrome-ink); border-bottom-color: var(--pl); background: var(--bg); border-radius: 6px 6px 0 0; }

.app { flex: 1; display: grid; grid-template-columns: 300px 1fr; min-height: 0; }

aside {
  background: var(--surface); border-right: 1px solid var(--border); padding: 18px;
  overflow-y: auto; display: flex; flex-direction: column; gap: 18px;
}

.modeswitch { display: flex; flex-direction: column; gap: 6px; }
.modeswitch button {
  all: unset; cursor: pointer; font-family: "IBM Plex Sans", sans-serif; font-weight: 600;
  font-size: 0.86rem; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border);
  color: var(--ink); background: var(--surface-2);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.modeswitch button:focus-visible { outline: 2px solid var(--pl); outline-offset: 2px; }
.modeswitch button.active { background: var(--chrome); color: var(--chrome-ink); border-color: var(--chrome); }
.modeswitch button .sub { display: block; font-weight: 400; font-size: 0.74rem; opacity: 0.72; margin-top: 2px; }

.eyebrow {
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-muted); margin: 0 0 8px;
}

.togglelist { display: flex; flex-direction: column; gap: 8px; }
.toggle { display: flex; align-items: center; gap: 9px; font-size: 0.86rem; cursor: pointer; user-select: none; }
.toggle input { accent-color: var(--pl); width: 15px; height: 15px; cursor: pointer; flex: none; }
.swatch { width: 13px; height: 13px; border-radius: 3px; flex: none; border: 1px solid rgba(0, 0, 0, 0.15); }

.legend { display: flex; flex-direction: column; gap: 7px; }
.legend-row { display: flex; align-items: center; gap: 9px; font-size: 0.82rem; color: var(--ink); }
.legend-row .swatch { width: 15px; height: 15px; border-radius: 3px; }

.opacity-row { display: flex; align-items: center; gap: 10px; }
.opacity-row input[type="range"] { flex: 1; accent-color: var(--pl); }
.opacity-row span {
  font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--ink-muted);
  width: 3ch; text-align: right; font-variant-numeric: tabular-nums;
}

.statline {
  font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; color: var(--ink-muted);
  background: var(--surface-2); border-radius: 8px; padding: 10px 12px; line-height: 1.5;
}
.statline b { color: var(--ink); font-weight: 500; }

main { position: relative; min-width: 0; min-height: 0; }
#map { width: 100%; height: 100%; background: var(--surface-2); }
.map-loading {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: "IBM Plex Mono", monospace; font-size: 0.82rem; color: var(--ink-muted);
  background: var(--surface-2); z-index: 500; pointer-events: none; opacity: 0; transition: opacity 0.15s;
}
.map-loading.visible { opacity: 1; }

/* Leaflet dark-mode overrides */
.leaflet-tooltip {
  background: var(--chrome);
  color: var(--chrome-ink);
  border: none;
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.8rem;
  padding: 10px 12px;
}
.leaflet-tooltip-top:before { border-top-color: var(--chrome); }
.leaflet-tooltip-bottom:before { border-bottom-color: var(--chrome); }
.leaflet-tooltip-left:before { border-left-color: var(--chrome); }
.leaflet-tooltip-right:before { border-right-color: var(--chrome); }
.tt-title { font-weight: 600; margin-bottom: 4px; }
.tt-row { display: flex; justify-content: space-between; gap: 14px; font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; color: #cfd8e2; }
.tt-row b { color: var(--chrome-ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.leaflet-control-attribution { background: rgba(255, 255, 255, 0.75); font-size: 0.68rem; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .leaflet-control-attribution { background: rgba(23, 28, 36, 0.75); color: var(--ink-muted); }
}
:root[data-theme="dark"] .leaflet-control-attribution { background: rgba(23, 28, 36, 0.75); color: var(--ink-muted); }

.badge {
  display: inline-block; font-family: "IBM Plex Mono", monospace; font-size: 0.68rem;
  padding: 2px 6px; border-radius: 4px; background: var(--surface-2); color: var(--ink-muted); margin-left: 6px;
}

footer.note {
  flex: none; padding: 8px 28px; font-size: 0.72rem; color: var(--ink-muted);
  background: var(--surface); border-top: 1px solid var(--border);
}
footer.note a { color: var(--ink-muted); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  aside { border-right: none; border-bottom: 1px solid var(--border); max-height: 40vh; }
}