first commit

Made-with: Cursor

frontend/app/not-found.tsx

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+import type { Metadata } from "next";
+import Link from "next/link";
+
+export const metadata: Metadata = {
+  title: "Page Not Found",
+  robots: { index: false, follow: false },
+};
+
+export default function NotFound() {
+  return (
+    <div className="min-h-screen flex flex-col items-center justify-center px-8">
+      <span className="text-8xl md:text-[12rem] font-black tracking-tighter text-transparent bg-clip-text bg-gradient-to-r from-primary to-primary-container leading-none">
+        404
+      </span>
+      <h1 className="text-2xl md:text-3xl font-bold mt-6 mb-3">
+        Page not found
+      </h1>
+      <p className="text-on-surface-variant mb-10 text-center max-w-md">
+        The page you&apos;re looking for doesn&apos;t exist or has been moved.
+      </p>
+      <Link
+        href="/"
+        className="bg-gradient-to-r from-primary to-primary-container text-on-primary px-8 py-3 rounded-lg font-bold hover:scale-105 transition-transform"
+      >
+        Back to Home
+      </Link>
+    </div>
+  );
+}