Update padding for mobile responsiveness in index.astro

Author: BunsDev

apps/marketing/src/pages/index.astro

@@ -1042,7 +1042,7 @@ const themeIdeas = [
 
   @media (max-width: 720px) {
     .main {
-      padding: 1.5rem 1rem 3.5rem;
+      padding-block: 1.5rem 3.5rem;
     }
 
     .tagline {