/* agentbooks leans on border + surface, not drop shadows.
   Only overlays (menus, dialogs, toasts) earn a shadow. */
:root{
  --shadow-none:none;
  --shadow-small:0 1px 2px rgba(15,18,22,.05);
  --shadow-medium:0 2px 8px -2px rgba(15,18,22,.08),0 1px 2px rgba(15,18,22,.04);
  --shadow-large:0 12px 32px -8px rgba(15,18,22,.16),0 2px 6px rgba(15,18,22,.05);
  --shadow-inset-top:inset 0 1px 0 rgba(255,255,255,.06);
}