Aster

Aster gives the expanded panel its content while the other panels remain compact logo rails at the medium breakpoint and above.

Briar

Native details elements that share a name close their open sibling, so this behavior needs no JavaScript.

Cinder

The accordion source order remains unchanged as the panels expand and collapse horizontally.

Dune

Below the medium breakpoint, this group uses the usual stacked accordion layout without any horizontal treatment.