Foundations
Elevation
Elevation uses two-layer shadows (key + ambient) to show the relative height of surfaces and the hierarchy between them.
Shadow ramp
shadow2
shadow-2
Slightly raised elements in content: message bubbles, code blocks
shadow4
shadow-4
Card (default), command bar
shadow8
shadow-8
Card on hover, tooltip
shadow16
shadow-16
Menu, popover, dropdown
shadow28
shadow-28
Sliding panel, teaching popover
shadow64
shadow-64
Dialog, modal window