body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}
form {
    background: #fff;
    margin: 100px auto;
    padding: 20px;
    border: 1px solid #ccc;
    width: 300px;
    border-radius: 5px;
    text-align: center;
}
form input, form button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}