Marketing route group, layout, typography setup

app/(marketing)/page.tsx

@@ -0,0 +1,22 @@
+/**
+ * Manifesto Homepage
+ * 
+ * Main landing page for the AI Speedrun manifesto website.
+ * This page will display the long-form manifesto content.
+ */
+
+export default function ManifestoPage() {
+  return (
+    <main>
+      <div className="max-w-4xl mx-auto px-4 py-8">
+        <h1 className="text-4xl font-bold text-slate-900 mb-4">
+          Manifesto Page
+        </h1>
+        <p className="text-lg text-slate-600">
+          Marketing route group is working. Content will be loaded here.
+        </p>
+      </div>
+    </main>
+  )
+}
+