.map-shell {
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  gap: 0;
  min-height: calc(100vh - 200px);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.filter-rail { padding: 16px; border-right: 1px solid var(--ink); background: var(--paper-2); }
.filter-rail fieldset { border: none; padding: 0; margin: 16px 0; }
.filter-rail label { display: block; font-size: 12px; padding: 2px 0; }
.map { position: relative; }
.map .leaflet-tile-pane { filter: sepia(15%) saturate(70%) hue-rotate(-5deg); }
.detail-panel { padding: 16px; border-left: 1px solid var(--ink); background: var(--paper-2); }

@media (max-width: 900px) {
  .map-shell { grid-template-columns: 1fr; }
  .filter-rail, .detail-panel { display: none; }
}