feat: add handler for invlid coordinates

* prvent default onmouseover/onclick handler
* set bg-color of GeoLink as gray
* add title to suggest another CRS

1 files changed, 6 insertions, 0 deletions

diff --git a/src/css/dumbymap.css b/src/css/dumbymap.css
index 52d0ded..7aff339 100644
--- a/src/css/dumbymap.css
+++ b/src/css/dumbymap.css
@@ -152,6 +152,12 @@ a[href^='http']:not(:has(img))::after,
     background-color: #9ee7ea;
   }
 
+  &[data-valid="false"] {
+    background-color: lightgray;
+
+    opacity: 0.7;
+  }
+
   &:hover, &.drag {
     background-image: none;