Surface
Low-level background container. Use this when you need a generic surface — for content cards, prefer the richer Card component.
Elevation
flat
raised
hover
inverse
<Surface elevation="flat" />
<Surface elevation="raised" />
<Surface elevation="hover" />
<Surface elevation="overlay" />
<Surface elevation="inverse" />Composing
Combine elevation, radius and border to build any container shape — sidebars, drawers, overlay menus, callouts.