body {
    font-family: Arial, sans-serif;
    margin: 20px;
    padding: 20px;
}

#login-form, #json-form {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

input, textarea, button {
    width: 100%;
    margin-bottom: 15px;
    padding: 10px;
}

h2 {
    text-align: center;
}