/* ==========================================================================
   topo-bg — topographic contour background behind the map subsection.
   Its opacity is driven by js/modules/topo-fade.js as you scroll past.
   ========================================================================== */

.map-feature {
  position: relative;
  z-index: 0;
  overflow: hidden;
  padding: 40px 0;
}
.topo-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  pointer-events: none;
}
.topo-bg svg {
  width: 100%;
  height: 100%;
  display: block;
}
.topo-bg polygon {
  fill: none;
  stroke: var(--bush);
  stroke-width: 1.5;
  opacity: 0.55;
}