:vars {
    /*
    * This value is related to current BM z-index values of Header and Sidebar.
    * Sidebar is 2, so Page should be beneath it.
    */
    zIndex_PAGE: 1;
    /*
    * The following values assume that the BM's Header has zIndex 2000
    */
    zIndex_NOTIFICATION: 4000;
    zIndex_MODAL: 5000;
    /*
    * Making Tooltip higher than Modal, assumes that when a modal is Opened, then all Tooltip's are closed.
    */
    zIndex_TOOLTIP: 6000;
}