Increase mobile background zoom to 800% for wider view

- Changed from 300% to 800% for better mobile composition
- Image appears even more zoomed out on mobile devices
- Better visibility of full scene without extreme cropping

static/css/adaptive-background.css

@@ -6,7 +6,7 @@
     background-image: url('../../images/overlay.png'),
                       linear-gradient(0deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1)),
                       url('../../images/desktop.webp') !important;
-    background-size: 300%;
+    background-size: 800%;
     background-position: center;
     background-attachment: fixed;
   }