The scroll-to-bottom control, the approval and queue float panels, and
the inline code chips still carried the light-theme fills (#ffffff,
rgba(255,255,255,.94/.68)) with .dark overrides pinned to old greys.
Point all of them at --bg-card and its rgb triple so the alpha layers
keep working, then drop the overrides that became identical to the base
rule.
Low-alpha white overlays are left alone — on a dark surface they read as
a lift, which is the intent.