feat: add branded not found route

src/App.tsx

@@ -1,12 +1,17 @@
 import { Toaster } from 'react-hot-toast';
 import { createBrowserRouter, RouterProvider } from 'react-router';
 import LandingPage from './pages/LandingPage';
+import NotFoundPage from './pages/NotFoundPage';
 
 const router = createBrowserRouter([
 	{
 		path: '/',
 		element: <LandingPage />,
 	},
+	{
+		path: '*',
+		element: <NotFoundPage />,
+	},
 ]);
 
 function App() {

src/pages/NotFoundPage.tsx

@@ -0,0 +1,53 @@
+import { Link } from 'react-router';
+import { ArrowLeft, Compass } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+
+function NotFoundPage() {
+	return (
+		<main className="min-h-screen overflow-hidden bg-[#06111f] text-white">
+			<section className="relative flex min-h-screen items-center px-6 py-16">
+				<div
+					className="absolute inset-0 bg-[radial-gradient(circle_at_top_left,rgba(245,158,11,0.2),transparent_30%),linear-gradient(135deg,rgba(6,17,31,0.98),rgba(12,33,58,0.95))]"
+					aria-hidden="true"
+				/>
+				<div
+					className="absolute inset-x-0 bottom-0 h-40 bg-gradient-to-t from-black/30 to-transparent"
+					aria-hidden="true"
+				/>
+
+				<div className="relative mx-auto w-full max-w-4xl">
+					<div className="mb-8 inline-flex items-center gap-2 rounded-full border border-amber-300/20 bg-amber-300/10 px-4 py-2 font-jakarta text-sm font-bold text-amber-100">
+						<Compass className="size-4" aria-hidden="true" />
+						Route not found
+					</div>
+
+					<p className="font-jakarta text-sm font-black uppercase tracking-[0.28em] text-amber-200/80">
+						Access Layer
+					</p>
+					<h1 className="mt-4 max-w-3xl font-grotesque text-5xl font-black leading-none tracking-tight sm:text-6xl md:text-7xl">
+						This marketplace path is not live yet.
+					</h1>
+					<p className="mt-6 max-w-2xl font-jakarta text-base leading-8 text-white/70 sm:text-lg">
+						The creator key route you opened does not exist. Return to the
+						marketplace home to browse creators, review key pricing, and keep
+						exploring.
+					</p>
+
+					<div className="mt-8 flex flex-col gap-3 sm:flex-row">
+						<Button
+							asChild
+							className="h-12 rounded-xl bg-amber-400 px-5 font-jakarta font-black text-slate-950 hover:bg-amber-300"
+						>
+							<Link to="/">
+								<ArrowLeft className="size-4" aria-hidden="true" />
+								Back to marketplace
+							</Link>
+						</Button>
+					</div>
+				</div>
+			</section>
+		</main>
+	);
+}
+
+export default NotFoundPage;

src/pages/__tests__/NotFoundPage.test.tsx

@@ -0,0 +1,24 @@
+import { render, screen } from '@testing-library/react';
+import { MemoryRouter } from 'react-router';
+import { describe, expect, it } from 'vitest';
+import NotFoundPage from '@/pages/NotFoundPage';
+
+describe('NotFoundPage', () => {
+	it('points unknown routes back to the marketplace home', () => {
+		render(
+			<MemoryRouter initialEntries={['/missing-route']}>
+				<NotFoundPage />
+			</MemoryRouter>
+		);
+
+		expect(
+			screen.getByRole('heading', {
+				name: /this marketplace path is not live yet/i,
+			})
+		).toBeInTheDocument();
+
+		expect(
+			screen.getByRole('link', { name: /back to marketplace/i })
+		).toHaveAttribute('href', '/');
+	});
+});