/* P90: a clearer, more vivid water-first basemap for the OptiWake boats.
 * The filter is deliberately limited to Leaflet's tile pane: boat hulls,
 * course marks, wind arrows and white tracker labels retain their true colors.
 */
#map .leaflet-tile-pane {
  filter: hue-rotate(10deg) saturate(1.55) brightness(1.02) contrast(1.10);
}