fix: Smooth scrolling

Smooth scrolling wasn't working due to the `scroll-behavior` being under body, not html. This commit moves it to html and makes it in Tailwind CSS format.

src/app/globals.css

@@ -85,12 +85,13 @@
 }
 
 @layer base {
+   html {
+      @apply scroll-smooth;
+   }
    * {
       @apply border-border;
    }
    body {
       @apply bg-background text-foreground;
-
-      scroll-behavior: smooth;
    }
-}
+}