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

h1 {
    color: #333;
}

form {
    margin-top: 20px;
}

input, button {
    padding: 10px;
    margin: 5px 0;
}

.error {
    color: red;
}

.success {
    color: green;
}