Give the shell one header, a skip link, and a cookie-aware first paint.

Breakpoint clones were still in the tab order, marketing always painted Log in, and at 430px the logo overlay covered Use cases and Learn.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(marketing)/layout.tsx

@@ -1,8 +1,10 @@
 import dynamic from "next/dynamic";
 import { Suspense, type ReactNode } from "react";
-import MarketingNavigation from "../components/navigation/MarketingNavigation";
+import ConditionalNavigation from "../components/navigation/ConditionalNavigation";
+import SkipToContent from "../components/navigation/SkipToContent";
 import { MessagesProvider } from "../contexts/MessagesContext";
 import { AuthModalProvider } from "../contexts/AuthModalContext";
+import { MAIN_CONTENT_ID } from "../../lib/mainContent";
 import marketingMessages from "../../messages/en/marketing";
 
 // Site footer is part of the public marketing chrome only — not rendered for
@@ -20,14 +22,21 @@ export default function MarketingLayout({ children }: { children: ReactNode }) {
     <MessagesProvider messages={marketingMessages}>
       <AuthModalProvider>
         {/*
-         * MarketingNavigation reads `usePathname()` to decide chromeless paths
-         * (uncached data under `cacheComponents`). Suspense lets the static
-         * shell prerender; the nav streams in with the correct visibility.
+         * Same session-aware shell as `(app)` / `(admin)`: `ConditionalNavigation`
+         * reads the cookie behind Suspense so the static page shell can prerender
+         * while the header streams signed-in vs signed-out correctly.
          */}
+        <SkipToContent />
         <Suspense fallback={null}>
-          <MarketingNavigation />
+          <ConditionalNavigation />
         </Suspense>
-        <main className="flex-1">{children}</main>
+        <main
+          id={MAIN_CONTENT_ID}
+          tabIndex={-1}
+          className="flex-1 outline-none"
+        >
+          {children}
+        </main>
         <Footer />
       </AuthModalProvider>
     </MessagesProvider>