.leaflet-gl-layer { pointer-events: none; }
.basemap-notice { position: absolute; z-index: 700; left: 50%; top: 96px;
  transform: translateX(-50%); max-width: calc(100% - 32px); padding: 8px 12px;
  border-radius: 12px; background: #fff; color: #526371; box-shadow: 0 2px 12px #0002;
  font: 13px/1.4 sans-serif; text-align: center; }
.basemap-notice[hidden] { display: none; }
.basemap-notice button { border: 0; background: transparent; color: #37657c;
  text-decoration: underline; font: inherit; cursor: pointer; margin-left: 6px; }