Borders, breakpoints, z-index

The menu is z-index: 9999. The modal is 100. The toast is 50. Borders are 1px here and 1.5px there. Breakpoints are whatever the last file used.

These are tokens too. Name the layers. Name the widths. Name the breakpoints. A collision is what happens when the values stay raw.

Watch the menu sit on top of the modal. Then move to a named scale and the stack sorts itself.

z.dropdown, z.modal, z.toast. The numbers can change. The order cannot.