:root{--z-index-backdrop:1000;--z-index-modal:1050;--z-index-tooltip:1100;--z-index-notification:1150;--z-index-loading:1200}.z-backdrop{z-index:var(--z-index-backdrop)}.z-modal{z-index:var(--z-index-modal)}.z-tooltip{z-index:var(--z-index-tooltip)}.z-notification{z-index:var(--z-index-notification)}.z-loading{z-index:var(--z-index-loading)}