html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #222222;
    overflow: hidden;
}

.wrapper-iframe {
    display: inline-block;
    width: 100%;
    height: 100%;
}

iframe {
    display: block;
    width: 100%;
    height: 100%;
}