/*Mediaquerys*/
@media only screen and (max-width: 767px) {
    .kontaktbild {
        width: 150px;
    }
}

@media only screen and (min-width: 767px) and (max-width: 960px) {
    .kontaktbild {        
        width: 240px;
    }
}

@media only screen and (min-width: 961px) {
    .kontaktbild {
        visibility: visible;
        width: 400px;
    }
}