/* Z-index tokens — explicit stacking layer scale.
*
* Always use a token, never a magic number. Add a new layer here if needed.
*/
:root {
--z-base: 0;
--z-dropdown: 10;
--z-sticky: 20;
--z-overlay: 30;
--z-modal: 40;
--z-popover: 50;
--z-toast: 60;
--z-tooltip: 70;
}