@media screen and (max-width:959px) {
#div-gpt-ad-1490842466321-0 {
    width: 100% !important;
    clear: both;
    float: left;
    margin: 30px auto 10px;
    overflow: scroll;
}
}
@media screen and (max-width:767px) {
#div-gpt-ad-1490842466321-0 iframe {
    width:600px !important;
}
}