Final touches for V4 upgrade

Author: tnylea

resources/css/app.css

@@ -135,7 +135,7 @@
   --primary-foreground: hsl(0 0% 9%);
   --secondary: hsl(0 0% 14.9%);
   --secondary-foreground: hsl(0 0% 98%);
-  --muted: hsl(0 0% 6.9%);
+  --muted: hsl(0 0% 16.08%);
   --muted-foreground: hsl(0 0% 63.9%);
   --accent: hsl(0 0% 14.9%);
   --accent-foreground: hsl(0 0% 98%);