Revert "feat: fixed header with hero section extending behind it"

This reverts commit fc97c1b84b.

packages/frontend/src/routes/+layout.svelte

@@ -65,7 +65,7 @@
   <Header authStatus={data.authStatus} />
 
   <!-- Main Content -->
-  <main class="min-h-screen pt-16">
+  <main class="min-h-screen">
     {@render children()}
   </main>
 

packages/frontend/src/routes/+page.svelte

@@ -13,7 +13,7 @@
 <Meta title={$_("home.hero.title")} description={$_("home.hero.description")} />
 
 <!-- Hero Section -->
-<section class="relative min-h-screen -mt-16 flex items-center justify-center overflow-hidden">
+<section class="relative min-h-screen flex items-center justify-center overflow-hidden">
   <div class="absolute inset-0 bg-gradient-to-br from-primary/20 via-accent/10 to-background"></div>
   <SexyBackground />