diff --git a/backend/routes/app/users.route.js b/backend/routes/app/users.route.js
index c85f339..019f85b 100644
--- a/backend/routes/app/users.route.js
+++ b/backend/routes/app/users.route.js
@@ -6,7 +6,7 @@ dotenv.config();
 const router = express.Router();
 
 router.post("/verify-token", authenticate, async (req, res) => {
-  res.status(200);
+  res.sendStatus(200);
 });
 
 router.post("/login", async (req, res) => {
diff --git a/frontend/src/components/LandingPage.tsx b/frontend/src/components/LandingPage.tsx
deleted file mode 100644
index a8155b9..0000000
--- a/frontend/src/components/LandingPage.tsx
+++ /dev/null
@@ -1,7 +0,0 @@
-export const LandingPage = () => {
-  return (
-    <>
-      <p>Landing Page</p>
-    </>
-  );
-};
diff --git a/frontend/src/components/LoginCard.tsx b/frontend/src/components/LoginCard.tsx
new file mode 100644
index 0000000..9e79513
--- /dev/null
+++ b/frontend/src/components/LoginCard.tsx
@@ -0,0 +1,70 @@
+import { useForm } from "@tanstack/react-form";
+import { Input, Button } from "@mui/joy";
+import { useMutation } from "@tanstack/react-query";
+import { signInUser } from "../utils/auth";
+import { useTranslation } from "react-i18next";
+import { useNavigate } from "@tanstack/react-router";
+
+export const LoginCard = () => {
+  const { t } = useTranslation();
+  const navigate = useNavigate();
+
+  const form = useForm({
+    defaultValues: {
+      username: "",
+      password: "",
+    },
+    onSubmit: async ({ value }) => {
+      mutate({ username: value.username, password: value.password });
+    },
+  });
+
+  const { mutate, isPending } = useMutation({
+    mutationFn: ({
+      username,
+      password,
+    }: {
+      username: string;
+      password: string;
+    }) => signInUser(username, password, t),
+    onSuccess: (result) => {
+      if (result.ok) {
+        navigate({ to: "/app/inventory" });
+      }
+    },
+  });
+
+  return (
+    <>
+      <form
+        onSubmit={(e) => {
+          e.preventDefault();
+          form.handleSubmit();
+        }}
+      >
+        <form.Field name="username">
+          {(field) => (
+            <Input
+              value={field.state.value}
+              onChange={(e) => field.handleChange(e.target.value)}
+              placeholder={t("username")}
+            />
+          )}
+        </form.Field>
+        <form.Field name="password">
+          {(field) => (
+            <Input
+              value={field.state.value}
+              type="password"
+              onChange={(e) => field.handleChange(e.target.value)}
+              placeholder={t("password")}
+            />
+          )}
+        </form.Field>
+        <Button type="submit" loading={isPending}>
+          {t("login")}
+        </Button>
+      </form>
+    </>
+  );
+};
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index bef5202..820ab0f 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -1,10 +1,16 @@
-import { StrictMode } from 'react'
-import { createRoot } from 'react-dom/client'
-import './index.css'
-import App from './App.tsx'
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import "./index.css";
+import "./utils/i18n";
+import App from "./App.tsx";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 
-createRoot(document.getElementById('root')!).render(
+const queryClient = new QueryClient();
+
+createRoot(document.getElementById("root")!).render(
   <StrictMode>
-    <App />
+    <QueryClientProvider client={queryClient}>
+      <App />
+    </QueryClientProvider>
   </StrictMode>,
-)
+);
diff --git a/frontend/src/routeTree.gen.ts b/frontend/src/routeTree.gen.ts
index dfe1a17..716996f 100644
--- a/frontend/src/routeTree.gen.ts
+++ b/frontend/src/routeTree.gen.ts
@@ -11,9 +11,10 @@
 import { Route as rootRouteImport } from './routes/__root'
 import { Route as LoginRouteImport } from './routes/login'
 import { Route as IndexRouteImport } from './routes/index'
-import { Route as AppViewProductRouteImport } from './routes/app/view-product'
-import { Route as AppInventoryRouteImport } from './routes/app/inventory'
-import { Route as AppAddProductRouteImport } from './routes/app/add-product'
+import { Route as AppHiddenLayoutRouteImport } from './routes/app/_hiddenLayout'
+import { Route as AppHiddenLayoutViewProductRouteImport } from './routes/app/_hiddenLayout/view-product'
+import { Route as AppHiddenLayoutInventoryRouteImport } from './routes/app/_hiddenLayout/inventory'
+import { Route as AppHiddenLayoutAddProductRouteImport } from './routes/app/_hiddenLayout/add-product'
 
 const LoginRoute = LoginRouteImport.update({
   id: '/login',
@@ -25,49 +26,61 @@ const IndexRoute = IndexRouteImport.update({
   path: '/',
   getParentRoute: () => rootRouteImport,
 } as any)
-const AppViewProductRoute = AppViewProductRouteImport.update({
-  id: '/app/view-product',
-  path: '/app/view-product',
-  getParentRoute: () => rootRouteImport,
-} as any)
-const AppInventoryRoute = AppInventoryRouteImport.update({
-  id: '/app/inventory',
-  path: '/app/inventory',
-  getParentRoute: () => rootRouteImport,
-} as any)
-const AppAddProductRoute = AppAddProductRouteImport.update({
-  id: '/app/add-product',
-  path: '/app/add-product',
+const AppHiddenLayoutRoute = AppHiddenLayoutRouteImport.update({
+  id: '/app/_hiddenLayout',
+  path: '/app',
   getParentRoute: () => rootRouteImport,
 } as any)
+const AppHiddenLayoutViewProductRoute =
+  AppHiddenLayoutViewProductRouteImport.update({
+    id: '/view-product',
+    path: '/view-product',
+    getParentRoute: () => AppHiddenLayoutRoute,
+  } as any)
+const AppHiddenLayoutInventoryRoute =
+  AppHiddenLayoutInventoryRouteImport.update({
+    id: '/inventory',
+    path: '/inventory',
+    getParentRoute: () => AppHiddenLayoutRoute,
+  } as any)
+const AppHiddenLayoutAddProductRoute =
+  AppHiddenLayoutAddProductRouteImport.update({
+    id: '/add-product',
+    path: '/add-product',
+    getParentRoute: () => AppHiddenLayoutRoute,
+  } as any)
 
 export interface FileRoutesByFullPath {
   '/': typeof IndexRoute
   '/login': typeof LoginRoute
-  '/app/add-product': typeof AppAddProductRoute
-  '/app/inventory': typeof AppInventoryRoute
-  '/app/view-product': typeof AppViewProductRoute
+  '/app': typeof AppHiddenLayoutRouteWithChildren
+  '/app/add-product': typeof AppHiddenLayoutAddProductRoute
+  '/app/inventory': typeof AppHiddenLayoutInventoryRoute
+  '/app/view-product': typeof AppHiddenLayoutViewProductRoute
 }
 export interface FileRoutesByTo {
   '/': typeof IndexRoute
   '/login': typeof LoginRoute
-  '/app/add-product': typeof AppAddProductRoute
-  '/app/inventory': typeof AppInventoryRoute
-  '/app/view-product': typeof AppViewProductRoute
+  '/app': typeof AppHiddenLayoutRouteWithChildren
+  '/app/add-product': typeof AppHiddenLayoutAddProductRoute
+  '/app/inventory': typeof AppHiddenLayoutInventoryRoute
+  '/app/view-product': typeof AppHiddenLayoutViewProductRoute
 }
 export interface FileRoutesById {
   __root__: typeof rootRouteImport
   '/': typeof IndexRoute
   '/login': typeof LoginRoute
-  '/app/add-product': typeof AppAddProductRoute
-  '/app/inventory': typeof AppInventoryRoute
-  '/app/view-product': typeof AppViewProductRoute
+  '/app/_hiddenLayout': typeof AppHiddenLayoutRouteWithChildren
+  '/app/_hiddenLayout/add-product': typeof AppHiddenLayoutAddProductRoute
+  '/app/_hiddenLayout/inventory': typeof AppHiddenLayoutInventoryRoute
+  '/app/_hiddenLayout/view-product': typeof AppHiddenLayoutViewProductRoute
 }
 export interface FileRouteTypes {
   fileRoutesByFullPath: FileRoutesByFullPath
   fullPaths:
     | '/'
     | '/login'
+    | '/app'
     | '/app/add-product'
     | '/app/inventory'
     | '/app/view-product'
@@ -75,6 +88,7 @@ export interface FileRouteTypes {
   to:
     | '/'
     | '/login'
+    | '/app'
     | '/app/add-product'
     | '/app/inventory'
     | '/app/view-product'
@@ -82,17 +96,16 @@ export interface FileRouteTypes {
     | '__root__'
     | '/'
     | '/login'
-    | '/app/add-product'
-    | '/app/inventory'
-    | '/app/view-product'
+    | '/app/_hiddenLayout'
+    | '/app/_hiddenLayout/add-product'
+    | '/app/_hiddenLayout/inventory'
+    | '/app/_hiddenLayout/view-product'
   fileRoutesById: FileRoutesById
 }
 export interface RootRouteChildren {
   IndexRoute: typeof IndexRoute
   LoginRoute: typeof LoginRoute
-  AppAddProductRoute: typeof AppAddProductRoute
-  AppInventoryRoute: typeof AppInventoryRoute
-  AppViewProductRoute: typeof AppViewProductRoute
+  AppHiddenLayoutRoute: typeof AppHiddenLayoutRouteWithChildren
 }
 
 declare module '@tanstack/react-router' {
@@ -111,36 +124,57 @@ declare module '@tanstack/react-router' {
       preLoaderRoute: typeof IndexRouteImport
       parentRoute: typeof rootRouteImport
     }
-    '/app/view-product': {
-      id: '/app/view-product'
-      path: '/app/view-product'
+    '/app/_hiddenLayout': {
+      id: '/app/_hiddenLayout'
+      path: '/app'
+      fullPath: '/app'
+      preLoaderRoute: typeof AppHiddenLayoutRouteImport
+      parentRoute: typeof rootRouteImport
+    }
+    '/app/_hiddenLayout/view-product': {
+      id: '/app/_hiddenLayout/view-product'
+      path: '/view-product'
       fullPath: '/app/view-product'
-      preLoaderRoute: typeof AppViewProductRouteImport
-      parentRoute: typeof rootRouteImport
+      preLoaderRoute: typeof AppHiddenLayoutViewProductRouteImport
+      parentRoute: typeof AppHiddenLayoutRoute
     }
-    '/app/inventory': {
-      id: '/app/inventory'
-      path: '/app/inventory'
+    '/app/_hiddenLayout/inventory': {
+      id: '/app/_hiddenLayout/inventory'
+      path: '/inventory'
       fullPath: '/app/inventory'
-      preLoaderRoute: typeof AppInventoryRouteImport
-      parentRoute: typeof rootRouteImport
+      preLoaderRoute: typeof AppHiddenLayoutInventoryRouteImport
+      parentRoute: typeof AppHiddenLayoutRoute
     }
-    '/app/add-product': {
-      id: '/app/add-product'
-      path: '/app/add-product'
+    '/app/_hiddenLayout/add-product': {
+      id: '/app/_hiddenLayout/add-product'
+      path: '/add-product'
       fullPath: '/app/add-product'
-      preLoaderRoute: typeof AppAddProductRouteImport
-      parentRoute: typeof rootRouteImport
+      preLoaderRoute: typeof AppHiddenLayoutAddProductRouteImport
+      parentRoute: typeof AppHiddenLayoutRoute
     }
   }
 }
 
+interface AppHiddenLayoutRouteChildren {
+  AppHiddenLayoutAddProductRoute: typeof AppHiddenLayoutAddProductRoute
+  AppHiddenLayoutInventoryRoute: typeof AppHiddenLayoutInventoryRoute
+  AppHiddenLayoutViewProductRoute: typeof AppHiddenLayoutViewProductRoute
+}
+
+const AppHiddenLayoutRouteChildren: AppHiddenLayoutRouteChildren = {
+  AppHiddenLayoutAddProductRoute: AppHiddenLayoutAddProductRoute,
+  AppHiddenLayoutInventoryRoute: AppHiddenLayoutInventoryRoute,
+  AppHiddenLayoutViewProductRoute: AppHiddenLayoutViewProductRoute,
+}
+
+const AppHiddenLayoutRouteWithChildren = AppHiddenLayoutRoute._addFileChildren(
+  AppHiddenLayoutRouteChildren,
+)
+
 const rootRouteChildren: RootRouteChildren = {
   IndexRoute: IndexRoute,
   LoginRoute: LoginRoute,
-  AppAddProductRoute: AppAddProductRoute,
-  AppInventoryRoute: AppInventoryRoute,
-  AppViewProductRoute: AppViewProductRoute,
+  AppHiddenLayoutRoute: AppHiddenLayoutRouteWithChildren,
 }
 export const routeTree = rootRouteImport
   ._addFileChildren(rootRouteChildren)
diff --git a/frontend/src/routes/app/_hiddenLayout.tsx b/frontend/src/routes/app/_hiddenLayout.tsx
new file mode 100644
index 0000000..636a903
--- /dev/null
+++ b/frontend/src/routes/app/_hiddenLayout.tsx
@@ -0,0 +1,15 @@
+// routes/app/_layout.tsx (oder app.tsx als Parent)
+import { Outlet, createFileRoute } from "@tanstack/react-router";
+
+export const Route = createFileRoute("/app/_hiddenLayout")({
+  component: AppLayout,
+});
+
+function AppLayout() {
+  return (
+    <div>
+      <h1>Layout</h1>
+      <Outlet />
+    </div>
+  );
+}
diff --git a/frontend/src/routes/app/_hiddenLayout/add-product.tsx b/frontend/src/routes/app/_hiddenLayout/add-product.tsx
new file mode 100644
index 0000000..f2307b9
--- /dev/null
+++ b/frontend/src/routes/app/_hiddenLayout/add-product.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute, redirect } from "@tanstack/react-router";
+import { isAuthenticated } from "../../../utils/auth";
+
+export const Route = createFileRoute("/app/_hiddenLayout/add-product")({
+  beforeLoad: async () => {
+    if (!(await isAuthenticated())) {
+      throw redirect({
+        to: "/login",
+      });
+    }
+  },
+  component: RouteComponent,
+});
+
+function RouteComponent() {
+  return <div>Hello "/app/add-product"!</div>;
+}
diff --git a/frontend/src/routes/app/_hiddenLayout/inventory.tsx b/frontend/src/routes/app/_hiddenLayout/inventory.tsx
new file mode 100644
index 0000000..afeab4b
--- /dev/null
+++ b/frontend/src/routes/app/_hiddenLayout/inventory.tsx
@@ -0,0 +1,21 @@
+import { createFileRoute, redirect } from "@tanstack/react-router";
+import { isAuthenticated } from "../../../utils/auth";
+
+export const Route = createFileRoute("/app/_hiddenLayout/inventory")({
+  beforeLoad: async () => {
+    if (!(await isAuthenticated())) {
+      throw redirect({
+        to: "/login",
+      });
+    }
+  },
+  component: RouteComponent,
+});
+
+function RouteComponent() {
+  return (
+    <>
+      <p>Inventar</p>
+    </>
+  );
+}
diff --git a/frontend/src/routes/app/_hiddenLayout/view-product.tsx b/frontend/src/routes/app/_hiddenLayout/view-product.tsx
new file mode 100644
index 0000000..2cbef25
--- /dev/null
+++ b/frontend/src/routes/app/_hiddenLayout/view-product.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute, redirect } from "@tanstack/react-router";
+import { isAuthenticated } from "../../../utils/auth";
+
+export const Route = createFileRoute("/app/_hiddenLayout/view-product")({
+  beforeLoad: async () => {
+    if (!(await isAuthenticated())) {
+      throw redirect({
+        to: "/login",
+      });
+    }
+  },
+  component: RouteComponent,
+});
+
+function RouteComponent() {
+  return <div>Hello "/app/view-product"!</div>;
+}
diff --git a/frontend/src/routes/app/add-product.tsx b/frontend/src/routes/app/add-product.tsx
deleted file mode 100644
index c218e62..0000000
--- a/frontend/src/routes/app/add-product.tsx
+++ /dev/null
@@ -1,9 +0,0 @@
-import { createFileRoute } from '@tanstack/react-router'
-
-export const Route = createFileRoute('/app/add-product')({
-  component: RouteComponent,
-})
-
-function RouteComponent() {
-  return <div>Hello "/app/add-product"!</div>
-}
diff --git a/frontend/src/routes/app/inventory.tsx b/frontend/src/routes/app/inventory.tsx
deleted file mode 100644
index da772c9..0000000
--- a/frontend/src/routes/app/inventory.tsx
+++ /dev/null
@@ -1,17 +0,0 @@
-import { createFileRoute, redirect } from "@tanstack/react-router";
-import { isAuthenticated } from "../../utils/auth";
-
-export const Route = createFileRoute("/app/inventory")({
-  beforeLoad: () => {
-    if (!isAuthenticated()) {
-      throw redirect({
-        to: "/login",
-      });
-    }
-  },
-  component: RouteComponent,
-});
-
-function RouteComponent() {
-  return <div>Hello "/app/inventory"!</div>;
-}
diff --git a/frontend/src/routes/app/view-product.tsx b/frontend/src/routes/app/view-product.tsx
deleted file mode 100644
index 1bc3a33..0000000
--- a/frontend/src/routes/app/view-product.tsx
+++ /dev/null
@@ -1,9 +0,0 @@
-import { createFileRoute } from '@tanstack/react-router'
-
-export const Route = createFileRoute('/app/view-product')({
-  component: RouteComponent,
-})
-
-function RouteComponent() {
-  return <div>Hello "/app/view-product"!</div>
-}
diff --git a/frontend/src/routes/login.tsx b/frontend/src/routes/login.tsx
index f7b477e..9940f41 100644
--- a/frontend/src/routes/login.tsx
+++ b/frontend/src/routes/login.tsx
@@ -1,9 +1,14 @@
-import { createFileRoute } from '@tanstack/react-router'
+import { createFileRoute } from "@tanstack/react-router";
+import { LoginCard } from "../components/LoginCard";
 
-export const Route = createFileRoute('/login')({
+export const Route = createFileRoute("/login")({
   component: RouteComponent,
-})
+});
 
 function RouteComponent() {
-  return <div>Hello "/login"!</div>
+  return (
+    <>
+      <LoginCard />
+    </>
+  );
 }
diff --git a/frontend/src/utils/auth.ts b/frontend/src/utils/auth.ts
index b329cd1..6ed64c5 100644
--- a/frontend/src/utils/auth.ts
+++ b/frontend/src/utils/auth.ts
@@ -1,29 +1,33 @@
 import { API_BASE } from "../config/api.config";
 import Cookies from "js-cookie";
-import { useTranslation } from "react-i18next";
+import type { TFunction } from "i18next";
 import { toast } from "react-toastify";
-import { redirect } from "@tanstack/react-router";
-
-const { t } = useTranslation();
 
 export async function isAuthenticated() {
-  const result = await fetch(`${API_BASE}/users/verify-token`, {
-    method: "POST",
-    headers: {
-      Authorization: `Bearer ${Cookies.get("token") || ""}`,
-      "Content-Type": "application/json",
-      Accept: "application/json",
-    },
-  });
+  if (Cookies.get("token")) {
+    const result = await fetch(`${API_BASE}/users/verify-token`, {
+      method: "POST",
+      headers: {
+        Authorization: `Bearer ${Cookies.get("token") || ""}`,
+        "Content-Type": "application/json",
+        Accept: "application/json",
+      },
+    });
 
-  if (result.status === 200) {
-    return true;
+    if (result.status === 200) {
+      return true;
+    }
   }
 
+  Cookies.remove("token");
   return false;
 }
 
-export async function signInUser(username: string, password: string) {
+export async function signInUser(
+  username: string,
+  password: string,
+  t: TFunction,
+) {
   const result = await fetch(`${API_BASE}/users/login`, {
     method: "POST",
     headers: {
@@ -35,21 +39,19 @@ export async function signInUser(username: string, password: string) {
   });
 
   const response = await result.json();
+  console.log(response);
 
   if (result.status === 202) {
-    Cookies.set("token", response.token);
-    return true;
+    Cookies.set("token", response.data.token);
+    return { ok: true as const };
   }
 
-  if (result.status !== 202) {
-    Cookies.remove("token");
-    toast.error(t(response.code));
-  }
+  Cookies.remove("token");
+  toast.error(t(response.code));
+  return { ok: false as const };
 }
 
 export function signOutUser() {
   Cookies.remove("token");
-  throw redirect({
-    to: "/login",
-  });
+  return { ok: true as const };
 }
diff --git a/frontend/src/utils/i18n/locales/de/de.json b/frontend/src/utils/i18n/locales/de/de.json
index e69de29..6876475 100644
--- a/frontend/src/utils/i18n/locales/de/de.json
+++ b/frontend/src/utils/i18n/locales/de/de.json
@@ -0,0 +1,6 @@
+{
+    "username": "Benutzername",
+    "password": "Passwort",
+    "eu001": "Falscher Benutzername oder Passwort!",
+    "login": "Login"
+}
\ No newline at end of file
diff --git a/frontend/src/utils/i18n/locales/en/en.json b/frontend/src/utils/i18n/locales/en/en.json
index e69de29..4ea442b 100644
--- a/frontend/src/utils/i18n/locales/en/en.json
+++ b/frontend/src/utils/i18n/locales/en/en.json
@@ -0,0 +1,6 @@
+{
+    "username": "Username",
+    "password": "Password",
+    "eu001": "Wrong username or password!",
+    "login": "Login"
+}
\ No newline at end of file