Update CSS classes in web pages

The CSS classes used across different web pages in the web application have been updated. This change mainly consists of adjustments to spacing on various elements to improve the visual layout. The alterations should enhance the readability and user experience of the mentioned pages.

apps/web/app/(marketing)/page.tsx

@@ -17,7 +17,7 @@ function Home() {
       <div className={'container mx-auto'}>
         <div
           className={
-            'my-12 flex flex-col items-center md:flex-row lg:my-16' +
+            'mt-4 flex flex-col items-center md:flex-row xl:mt-12' +
             ' mx-auto flex-1 justify-center animate-in fade-in ' +
             ' duration-1000 slide-in-from-top-12'
           }