Update app/templates/landing.html

app/templates/landing.html

@@ -11,7 +11,7 @@
       --primary-light: #60a5fa;
       --accent: #14b8a6;
       --bg: #f8fafc;
-      --bg-dark: #18181b;
+      --bg-dark: #18181b;  
       --text: #1e293b;
       --text-light: #f1f5f9;
       --card: #fff;