body {
    margin: 0px;
    padding: 0px;
}

#viewport {
    overflow: hidden;
    position: absolute;
    /* width is specified inline */

    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;

    cursor: move;

    background-color: #E5E3DF;
}

#substrate {
    position: absolute;
    top: 0px; left: 0px;
}

#viewport img {
    position: absolute;
    border: none;
}