On screens < 992px, sidebar-left and sidebar-right card modules
are transformed into Bootstrap accordion items via JS. Card headers
become collapsible toggles, card bodies collapse. On desktop resize
the accordion reverts to normal cards.
CSS scoped to mobile breakpoint styles the accordion buttons and
removes card borders for a clean stacked look.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Jonathan Miller
b637b78a4d