Sam did styling

frontend/src/styles/_variables.scss

@@ -1,3 +1,4 @@
+:root{
     $color-bg: #ffffff;
     $color-sidebar: #570000;
     $color-accent: #2563eb;
@@ -5,4 +6,14 @@ $color-muted: #6b7280;
     $spacing-sm: 8px;   
     $spacing-md: 16px;
     $border-radius: 6px;
-$rundbgbackgroundcolor: #a0a0a0;
+    $rundbgbackgroundcolor: #a0a0a0
+}
+
+@media (prefers-color-scheme: dark) {
+    :root {
+        $color-bg: #000000;
+        $color-sidebar: #f3ff73;
+        
+
+    }
+}