first commit

app/login/page.tsx

@@ -0,0 +1,57 @@
+"use client";
+
+import { signIn } from "next-auth/react";
+import Link from "next/link";
+import { useState } from "react";
+
+export default function LoginPage() {
+  const [error, setError] = useState<string | null>(null);
+
+  const onSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    setError(null);
+    const formData = new FormData(event.currentTarget);
+    const email = formData.get("email") as string;
+    const password = formData.get("password") as string;
+
+    const result = await signIn("credentials", {
+      email,
+      password,
+      redirect: true,
+      callbackUrl: "/"
+    });
+
+    if (result?.error) {
+      setError("Login fehlgeschlagen.");
+    }
+  };
+
+  return (
+    <div className="mx-auto max-w-md rounded bg-white p-6 shadow-sm">
+      <h1 className="text-2xl font-semibold">Login</h1>
+      <form onSubmit={onSubmit} className="mt-4 space-y-3">
+        <input
+          name="email"
+          type="email"
+          placeholder="E-Mail"
+          required
+          className="w-full rounded border border-slate-300 px-3 py-2"
+        />
+        <input
+          name="password"
+          type="password"
+          placeholder="Passwort"
+          required
+          className="w-full rounded border border-slate-300 px-3 py-2"
+        />
+        <button type="submit" className="w-full rounded bg-brand-500 px-4 py-2 text-white">
+          Anmelden
+        </button>
+      </form>
+      {error && <p className="mt-3 text-sm text-red-600">{error}</p>}
+      <p className="mt-4 text-sm text-slate-600">
+        Kein Konto? <Link href="/register" className="text-brand-700">Registrieren</Link>
+      </p>
+    </div>
+  );
+}