body {
    background-color: black;
    padding: 0;
    margin: 0 auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    overflow: hidden;
    height:100%;
    width:100%;
}

#mainContainer {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.prerollDiv {
    margin-left: auto;
    margin-right: auto;
}

#content, #adContainer {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

#contentElement {
    overflow: hidden;
}