diff --git a/core/style.css b/core/style.css
index 082774488..7e24d0997 100644
--- a/core/style.css
+++ b/core/style.css
@@ -1266,6 +1266,23 @@ td + td {
   box-shadow: none;
 }
 
+.leaflet-bar a {
+  text-decoration: none;
+}
+
+.leaflet-control-zoom-in, .leaflet-control-zoom-out {
+  background-size: 18px;
+  font-size: 0 !important;
+}
+
+.leaflet-control-zoom-in {
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M9 3v12M3 9h12' stroke='black' stroke-width='2.2' fill='none'/%3E%3C/svg%3E");
+}
+
+.leaflet-control-zoom-out {
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M3.5 9h11' stroke='black' stroke-width='2.2' fill='none'/%3E%3C/svg%3E");
+}
+
 
 .portal_details th, .portal_details td {
   vertical-align: top;