contact page restructure fix

apps/frontend/src/pages/contact.astro

@@ -60,7 +60,7 @@ const DISCORD_INVITE_LINK = import.meta.env.DISCORD_INVITE_LINK || "https://disc
           Join our primarily Hungarian-speaking community (English speakers are also welcome!).
         </p>
         
-        <div class="grid grid-cols-3 gap-4 justify-center">
+        <div class="grid grid-cols-1 sm:grid-cols-3 gap-4 justify-center">
           <div class="community-section border-[#5865F2]">
             <h3 class="community-section-title">Discord</h3>
             <p class="community-section-desc">We have a vibrant Discord server for real-time chat and support.</p>