diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..788bb46
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,37 @@
+{
+  "arrowParens": "always",
+  "bracketSpacing": true,
+  "endOfLine": "lf",
+  "htmlWhitespaceSensitivity": "css",
+  "insertPragma": false,
+  "singleAttributePerLine": false,
+  "bracketSameLine": false,
+  "jsxBracketSameLine": false,
+  "jsxSingleQuote": true,
+  "printWidth": 120,
+  "proseWrap": "preserve",
+  "quoteProps": "as-needed",
+  "requirePragma": false,
+  "semi": false,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "useTabs": false,
+  "embeddedLanguageFormatting": "auto",
+  "vueIndentScriptAndStyle": false,
+  "experimentalTernaries": false,
+  "overrides": [
+    {
+      "files": "*.ts",
+      "options": {
+        "parser": "typescript"
+      }
+    },
+    {
+      "files": "*.vue",
+      "options": {
+        "parser": "vue"
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/islands/FormField.vue b/src/islands/FormField.vue
new file mode 100644
index 0000000..3dd5fb7
--- /dev/null
+++ b/src/islands/FormField.vue
@@ -0,0 +1,17 @@
+<script setup lang="ts">
+import { ErrorMessage, Field } from 'vee-validate'
+
+defineProps<{
+  type: 'text' | 'email' | 'password'
+  name: string
+  label: string
+  required?: boolean
+}>()
+</script>
+
+<template>
+  <div class="flex flex-col gap-1">
+    <Field :type="type" :name="name" class="input" :placeholder="label" :required="required" />
+    <ErrorMessage :name="name" as="span" class="text-error" />
+  </div>
+</template>
diff --git a/src/islands/LoginForm.vue b/src/islands/LoginForm.vue
index a883257..1acc119 100644
--- a/src/islands/LoginForm.vue
+++ b/src/islands/LoginForm.vue
@@ -1,56 +1,41 @@
 <script setup lang="ts">
-import { toTypedSchema } from "@vee-validate/zod";
-import { useForm } from "vee-validate";
-import z from "zod";
+import { toTypedSchema } from '@vee-validate/zod'
+import { useForm } from 'vee-validate'
+import { ref } from 'vue'
+import FormField from './FormField.vue'
+import { loginSchema, type LoginForm as LoginFormData } from '../schemas/login'
 
-defineProps<{
-  email: string;
-}>();
+const props = defineProps<{
+  email: string
+  error?: string
+}>()
 
-interface Form {
-  email: string;
-  password: string;
-}
+const form = ref<HTMLFormElement>()
 
-const { handleSubmit } = useForm<Form>({
+const { handleSubmit } = useForm<LoginFormData>({
   initialValues: {
-    email: "",
-    password: "",
+    email: props.email,
+    password: '',
   },
-  validationSchema: toTypedSchema(
-    z.object({
-      email: z.email(),
-      password: z.string().min(8),
-    }),
-  ),
-});
+  validationSchema: toTypedSchema(loginSchema),
+})
 
-const onSubmit = handleSubmit(async (data) => {
-  console.log(data);
-});
+const onSubmit = handleSubmit((data) => {
+  const emailInput = form.value?.elements.namedItem('email')
+
+  if (emailInput instanceof HTMLInputElement) {
+    emailInput.value = data.email
+  }
+
+  form.value?.submit()
+})
 </script>
 
 <template>
-  <form
-    method="post"
-    class="container mx-auto p-4 flex flex-col gap-4"
-    @submit.prevent="onSubmit"
-  >
-    <input
-      type="email"
-      name="email"
-      class="input"
-      placeholder="E-Mail"
-      required
-      :value="email"
-    />
-    <input
-      type="password"
-      name="password"
-      class="input"
-      placeholder="Password"
-      required
-    />
+  <form ref="form" method="post" class="container mx-auto p-4 flex flex-col gap-4" @submit="onSubmit">
+    <div v-if="error" class="alert alert-error">{{ error }}</div>
+    <FormField type="email" name="email" label="E-Mail" required />
+    <FormField type="password" name="password" label="Password" required />
     <button type="submit" class="btn btn-primary self-start">Sign in</button>
   </form>
 </template>
diff --git a/src/pages/sign-in.astro b/src/pages/sign-in.astro
index d5a748b..f8b69a5 100644
--- a/src/pages/sign-in.astro
+++ b/src/pages/sign-in.astro
@@ -1,23 +1,32 @@
 ---
-import Layout from "../layouts/layout.astro";
-import LoginForm from "../islands/LoginForm.vue";
+import LoginForm from '../islands/LoginForm.vue'
+import Layout from '../layouts/layout.astro'
+import { loginSchema } from '../schemas/login'
 
-let email = "";
-let error = "";
+let email = ''
+let error = ''
 
-if (Astro.request.method === "POST") {
-  const formData = await Astro.request.formData();
+if (Astro.request.method === 'POST') {
+  const formData = await Astro.request.formData()
+  const input = {
+    email: formData.get('email'),
+    password: formData.get('password'),
+  }
+  const result = loginSchema.safeParse(input)
 
-  email = formData.get("email")?.toString() ?? "";
+  email = typeof input.email === 'string' ? input.email : ''
 
-  if (!email) {
-    error = "E-Mail shouldn't be empty.";
+  if (!result.success) {
+    error = result.error.issues[0]?.message ?? 'Invalid form data.'
+  } else {
+    email = result.data.email
+    console.log('POST DATA', result.data)
   }
 }
 ---
 
 <Layout>
-  <h1 class="text-2xl font-bold">Sign in</h1>
+  <h1 class='text-2xl font-bold'>Sign in</h1>
 
-  <LoginForm client:load email={email} />
+  <LoginForm client:load email={email} error={error} />
 </Layout>
diff --git a/src/schemas/login.ts b/src/schemas/login.ts
new file mode 100644
index 0000000..4d540db
--- /dev/null
+++ b/src/schemas/login.ts
@@ -0,0 +1,8 @@
+import z from 'zod'
+
+export const loginSchema = z.object({
+  email: z.string().trim().pipe(z.email()),
+  password: z.string().min(8),
+})
+
+export type LoginForm = z.infer<typeof loginSchema>