Feedback when geosearch finds nothing

Subtle, but it's driven me crazy in the past where seemingly reasonable
searches do nothing and "worked - but found nothing" and "maybe it's
just taking a second to work" aren't apparent.

code/geosearch.js

@@ -14,6 +14,7 @@ window.setupGeosearch = function() {
   $('#geosearchwrapper img').click(function(){
     map.locate({setView : true, maxZoom: 13});
   });
+  $('#geosearch').keyup(function(){$(this).removeClass('search_not_found')});
 }
 
 window.search = function(search) {
@@ -22,7 +23,10 @@ window.search = function(search) {
     }
     
     $.getJSON(NOMINATIM + encodeURIComponent(search), function(data) {
-      if(!data || !data[0]) return true;
+      if(!data || !data[0]) {
+        $('#geosearch').addClass('search_not_found');      
+        return true;
+      }
       var b = data[0].boundingbox;
       if(!b) return true;
       var southWest = new L.LatLng(b[0], b[2]),

style.css

@@ -469,6 +469,12 @@ input {
   margin-bottom: 2px;
   cursor: pointer;
 }
+
+.search_not_found{
+  color:red;
+  font-style: italic;
+}
+
 ::-webkit-input-placeholder {
   font-style: italic;
 }