body {
    font-family: Arial, sans-serif;
    text-align: center;
}

form {
    max-width: 400px;
    margin: 0 auto;
}

label, input {
    display: block;
    margin-bottom: 10px;
}

button {
    background-color: #007BFF;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}

#mensaje {
    margin-top: 20px;
}