#main-box {
    background-color: white;
    display: block;
    width: 70%;
    margin: 20px auto;
    padding: 20px;
    border-radius: 20px;
}

#contact-form {
    padding: 10px;
}

#contact-form > textarea {
    height: 200px;
    width: 80%;
    margin: 10px;
}

#contact-form > input {
    margin: 10px;
    width: 80%;
    height: 30px;
}

#contact-form > .submit-button {
    width: 100%;
    max-width: 500px;
}

@media (max-width: 530px) {
    #main-box {
        width: 90%;
    }
}