toptop layerDialogs, opened with showModal()

70--z-popoverThe account menu, the drag ghost

60--z-toast · --z-drawerThe toast; the phone drawer

55--z-gate · --z-scrimThe front door; the drawer's scrim

50--z-floatingThe floating timer's dock

45--z-shellThe top bar and the phone bar

20--z-tipThe ? help bubble's tip

5--z-localA popover inside a card (the color picker)

2--z-raisedThe edit-mode tools on a Home card