/* ==========================================================================
   Production sidebar styling now lives in the SHARED stylesheet:
     tool/shared/css/app.css   (dark sidebar, header, links, groups, footer,
                                 topbar, hamburger, mobile drawer)
   This file is intentionally empty — its old rules (collapsible submenus,
   caret, collapsed state, sidebar user-profile) became obsolete when the
   sidebar was flattened and the profile moved to the topbar (2026-08-07).
   No longer linked from home.php.
   ========================================================================== */