iframe {
    width: 900px;
    height: 800px;
}


@media only screen and (max-width: 1000px) {
    iframe {
        width: 800px;
    }
}

@media only screen and (max-width: 900px) {
    iframe {
        width: 700px;
    }
}

@media only screen and (max-width: 800px) {
    iframe {
        width: 600px;
    }
}

@media only screen and (max-width: 700px) {
    iframe {
        width: 500px;
        height: 900px;
    }
}

@media only screen and (max-width: 375px) {
    iframe {
        width: 350px;
        height: 900px;
    }
}