Try browser geolocation for location with London fallback

index.html

@@ -1625,8 +1625,34 @@ window.weatherThemes = {
         }
 
         // ============ Weather ============
-        var WEATHER_LAT = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lat) || 48.5667;
+        // Default location: London, UK
-        var WEATHER_LON = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lon) || 13.4319;
+        var DEFAULT_LAT = 51.5074;
+        var DEFAULT_LON = -0.1278;
+
+        var WEATHER_LAT = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lat) || DEFAULT_LAT;
+        var WEATHER_LON = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lon) || DEFAULT_LON;
+
+        // Try browser geolocation if no config location set
+        function initBrowserGeolocation() {
+            if (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lat) return;
+            if (!navigator.geolocation) return;
+            navigator.geolocation.getCurrentPosition(
+                function(pos) {
+                    WEATHER_LAT = pos.coords.latitude;
+                    WEATHER_LON = pos.coords.longitude;
+                    window.CONFIG.location = { lat: WEATHER_LAT, lon: WEATHER_LON };
+                    // Reload weather with new coordinates
+                    if (typeof fetchWeather === 'function') fetchWeather();
+                },
+                function() { /* ignored - keep default */ },
+                { timeout: 10000 }
+            );
+        }
+
+        // Get timezone offset based on user's local time
+        function getTimezoneOffsetMinutes() {
+            return new Date().getTimezoneOffset();
+        }
         var weatherData = null;
 
         var WMO_ICONS = {
@@ -1819,6 +1845,8 @@ window.weatherThemes = {
         if (debugEl && !(window.CONFIG && window.CONFIG.debug)) {
             debugEl.style.display = 'none';
         }
+        // Try browser geolocation if no explicit location configured
+        initBrowserGeolocation();
         animate();
         tick();