.fullscreen {
    display: block;
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    margin: 0;
    padding: 0;
}

.flex-layout {
    display: box;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-box;
    box-orient: vertical;
    -webkit-box-orient: vertical;
    -moz-box-orient: vertical;
    -ms-box-orient: vertical;
}
.flex-box {
    box-flex: 1;
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    -ms-box-flex: 1;
}