diff --git a/public/robots.txt b/public/robots.txt
deleted file mode 100644
index dd38d32..0000000
--- a/public/robots.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-User-agent: *
-Allow: /
-
-Sitemap: https://cheatingchelsea.com/sitemap.xml
diff --git a/src/app/not-found.tsx b/src/app/not-found.tsx
new file mode 100644
index 0000000..c3aa7ad
--- /dev/null
+++ b/src/app/not-found.tsx
@@ -0,0 +1,32 @@
+import Link from 'next/link';
+import { Button } from '@/components/ui/button';
+import Image from 'next/image';
+
+export default function NotFound() {
+  return (
+    <div className="flex flex-col items-center justify-center min-h-screen bg-background text-foreground">
+      <main className="text-center p-8 max-w-2xl mx-auto">
+        <div className="bg-black p-4 inline-block rounded-lg border-2 border-gray-700 shadow-2xl">
+            <Image
+              src="https://placehold.co/750x600.png"
+              alt="A calico cat's tail is sticking out from under a pile of papers."
+              width={750}
+              height={600}
+              className="object-cover"
+              data-ai-hint="cat hiding"
+            />
+            <div className="text-white pt-4 pb-2">
+                 <h1 className="text-6xl font-bold tracking-wider">404</h1>
+                 <p className="text-2xl mt-2">Not Found</p>
+            </div>
+        </div>
+        <p className="text-muted-foreground mt-8 mb-8 text-xl">
+          Oops! It looks like the page you're looking for has gone into hiding.
+        </p>
+        <Button asChild size="lg">
+          <Link href="/">Go Back to Home</Link>
+        </Button>
+      </main>
+    </div>
+  );
+}