html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
}

#iframe {
    width: 100%;
}

#Sheet {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 50px;
    background-color: white;
}

#ComposeTarget {
    width: 100%;
    height: 100%;
}

#ComposeViewport {
    width: 100%;
    height: 100%;
}