#banner {
    width: 75%;
    max-width: 800px;
    min-width: 350px;
}

@media screen and (max-height: 829.98px) {
    #banner {
        margin-top: 5vh;
    }
}

@media screen and (min-height: 830px) {
    #banner {
        margin-top: 12vh;
    }
}