diff --git a/src/App.tsx b/src/App.tsx
index d753e06..b4747ad 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -10,6 +10,7 @@ import ContactPage from "./pages/ContactPage";
 import RaycasterPage from "./pages/project/RaycasterPage";
 import RaytracerPage from "./pages/project/RaytracerPage";
 import EmulatorPage from "./pages/project/EmulatorPage";
+import NotFoundPage from "./pages/NotFoundPage";
 
 export default function App() {
   return (
@@ -86,6 +87,14 @@ export default function App() {
           </PageTransition>
         )}
       />
+      <Route
+        path="*404"
+        component={() => (
+          <PageTransition>
+            <NotFoundPage />
+          </PageTransition>
+        )}
+      />
     </Route>
   );
 }
diff --git a/src/data/site.ts b/src/data/site.ts
index b74c0d5..84c079c 100644
--- a/src/data/site.ts
+++ b/src/data/site.ts
@@ -32,6 +32,20 @@ export const homeMetadata = {
     "Mike Karl — Systementwickler & Creative Technologist aus Grafenau. Portfolio mit Projekten aus Systems Programming, Computer Graphics und Low-Level-Entwicklung.",
 };
 
+export const notFoundPage = {
+  metadata: {
+    title: "404 — Seite nicht gefunden",
+    description: "Die angeforderte Seite existiert nicht.",
+  },
+  label: "404 — Seite nicht gefunden",
+  title: "404",
+  subtitle: "Die angeforderte Route existiert nicht oder wurde verschoben.",
+  terminalPrompt: "$ navigate",
+  terminalError: "ENOENT — route not found",
+  homeCta: "Zur Startseite",
+  browseLabel: "Oder schau dich um:",
+};
+
 export const heroContent = {
   subtitle: [
     "Full-Stack Entwickler",
diff --git a/src/pages/NotFoundPage.tsx b/src/pages/NotFoundPage.tsx
new file mode 100644
index 0000000..5b7d4c6
--- /dev/null
+++ b/src/pages/NotFoundPage.tsx
@@ -0,0 +1,104 @@
+import { A, useLocation } from "@solidjs/router";
+import { For } from "solid-js";
+import { ArrowRight, Home } from "lucide-solid";
+import { usePageMeta } from "@/lib/meta";
+import { navLinks, notFoundPage } from "@/data/site";
+
+export default function NotFoundPage() {
+  const location = useLocation();
+
+  usePageMeta(
+    notFoundPage.metadata.title,
+    notFoundPage.metadata.description
+  );
+
+  return (
+    <main class="relative min-h-screen bg-deep-space overflow-hidden flex items-center">
+      <div
+        class="absolute inset-0 pointer-events-none"
+        style={{
+          background:
+            "radial-gradient(ellipse at 50% 30%, rgba(232,97,1,0.06) 0%, transparent 55%)",
+        }}
+      />
+      <div
+        class="absolute inset-0 pointer-events-none"
+        style={{
+          background:
+            "linear-gradient(to bottom, transparent 60%, #0F0E0C 100%)",
+        }}
+      />
+
+      <section class="relative z-10 w-full pt-32 pb-24 px-[5vw]">
+        <div class="max-w-[640px] mx-auto text-center space-y-8">
+          <p class="section-label">{notFoundPage.label}</p>
+
+          <h1
+            class="font-display font-bold text-text-primary leading-[0.85] tracking-tight"
+            style={{ "font-size": "clamp(5rem, 18vw, 9rem)" }}
+          >
+            {notFoundPage.title}
+          </h1>
+
+          <div class="flex items-center justify-center gap-4">
+            <div class="w-[60px] h-px bg-amber" />
+            <p class="font-mono text-text-secondary text-xs md:text-sm tracking-wider uppercase">
+              Not Found
+            </p>
+            <div class="w-[60px] h-px bg-amber" />
+          </div>
+
+          <p class="text-text-secondary text-lg leading-relaxed">
+            {notFoundPage.subtitle}
+          </p>
+
+          <div class="border border-warm-grey bg-charcoal p-5 md:p-6 text-left code-block">
+            <p class="text-text-secondary mb-3">
+              {notFoundPage.terminalPrompt}{" "}
+              <span class="text-text-primary">{location.pathname}</span>
+            </p>
+            <p>
+              <span class="keyword">Error</span>
+              {": "}
+              <span class="type">ENOENT</span>
+              <span class="text-text-secondary"> — </span>
+              <span class="string">{notFoundPage.terminalError}</span>
+            </p>
+          </div>
+
+          <div class="flex flex-col sm:flex-row items-center justify-center gap-4 pt-2">
+            <A
+              href="/"
+              class="inline-flex items-center gap-2 px-6 py-3 bg-amber text-deep-space font-display font-medium hover:bg-amber-hover transition-colors"
+            >
+              <Home size={18} />
+              {notFoundPage.homeCta}
+            </A>
+          </div>
+
+          <div class="pt-4 space-y-4">
+            <p class="font-mono text-text-secondary text-xs uppercase tracking-wider">
+              {notFoundPage.browseLabel}
+            </p>
+            <div class="flex flex-wrap items-center justify-center gap-3">
+              <For each={navLinks}>
+                {(link) => (
+                  <A
+                    href={link.href}
+                    class="inline-flex items-center gap-1.5 text-sm text-text-secondary hover:text-amber transition-colors group"
+                  >
+                    <span class="text-link">{link.label}</span>
+                    <ArrowRight
+                      size={14}
+                      class="opacity-0 -translate-x-1 group-hover:opacity-100 group-hover:translate-x-0 transition-all"
+                    />
+                  </A>
+                )}
+              </For>
+            </div>
+          </div>
+        </div>
+      </section>
+    </main>
+  );
+}