body {
    padding: 0px;
    margin: 0px;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.enterVR {
    position: absolute;
    width: 80px;
    height: 80px;
    z-index: 9999;
    background-image: url("../images/icon_close.png");
    background-size: contain;
    cursor: pointer;
    display: none;
}

.exitVR {
    position: absolute;
    width: 80px;
    height: 80px;
    z-index: 9999;
    background-image: url("../images/icon_open.png");
    background-size: contain;
    cursor: pointer;
}