/* 
 * Invisible bottom-line that always located at the bottom of the view-port.
 * It is used in the view-manager as a bottom-marker
 */
#viewportBottom {
	position: absolute;
    bottom: 0;
    right: 0;
    z-index: 100;
    width: 100%;
    font-size: 1px;
    line-height: 1px;
}