Add configurable basemap, invert filter, radar color schemes, fix height

MMM-CombinedMap.css

@@ -9,6 +9,21 @@
   background: #1a1a1a;
 }
 
+/* Inverted basemap for dark mode */
+.mmm-combinedmap-wrapper .inverted-tiles {
+  filter: invert(1) hue-rotate(180deg) brightness(0.9) contrast(0.9);
+}
+
+/* Vibrant radar colors - enhance visibility on dark backgrounds */
+.mmm-combinedmap-wrapper .radar-vibrant {
+  filter: saturate(1.5) brightness(1.2);
+}
+
+/* Bright radar for maximum visibility */
+.mmm-combinedmap-wrapper .radar-bright {
+  filter: saturate(2) brightness(1.4) contrast(1.1);
+}
+
 /* Hide Leaflet attribution */
 .mmm-combinedmap-wrapper .leaflet-control-attribution {
   display: none;