@media screen and (max-width:575px) {
    iframe.zpiframe {
       height: 900px;
    }
}

@media screen and (max-width:524px) {
    iframe.zpiframe {
       height: 1150px;
    }
}

@media screen and (max-width:375px) {
    iframe.zpiframe {
       height: 1200px;
    }
}