Source Fan
A stack fans out when the answer is backed by sources.
Usage
Meant for
Examples
On a Chat Source
Citations fanning out of a stack. The spread and the tilt both come from the same index, so adding a fifth source needs no new CSS — only a fifth child. --wm-spread sets the step: 128px here, so the four Chat Source chips end side by side (64px on a phone, where they overlap).
The class is wm wm-source-fan — the first half is the marker the trigger and reduced-motion rules hook into, the second is the effect.