/* =========================================================================
   Admin shell — overrides on top of /core/css/core.css.

   The shared design system lives in core.css. Anything added here must be
   genuinely admin-only; if both shells want it, it belongs in core. No new
   color or type tokens in a shell file — see .agent/docs/aesthetic.md.

   Empty by design as of chunk 1.1: the admin shell uses the core grid
   unchanged (brand / toolbar / sidebar / main).
   ========================================================================= */