html, body { height: 100%; margin: 0; }
#map { height: 100%; width: 100%; }
#legend {
  position: absolute;
  z-index: 1000;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.92);
  padding: 8px 12px;
  border-radius: 6px;
  font: 13px/1.4 system-ui, sans-serif;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
#legend .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}
.popup-title { font-weight: bold; font-size: 14px; }
.popup-warn { color: #b00; font-style: italic; }