@media (min-width: 1200px){
    .only-phone {
        display: none;
    }
}
@media (min-width: 320px) and (max-width: 1199px) {
    .only-phone {
        display: block;
    }
}
@media (min-width: 767px){
    .developed-by{
        float: right;
    }
}