Under Window Translucency → Glass, the glass block sets the surface
tokens transparent so <body> is the sole painter. A tab's `--tab-face`
read those tokens, so the ✕ runway resolved to transparent→transparent
and the chip's `bg-(--tab-face)` painted nothing: hovering showed a bare
✕ over un-faded text, with no gradient at all.
Add a `data-glass-field` contract beside the block's existing
`data-glass-opaque` / `data-glass-raised`: a declarer receives
`--glass-field`, the same body mix glass already paints. The tab prefers
it and falls back to its own surface token (`--tab-surface`, which
TAB_ACTIVE / TAB_IDLE now set instead of `--tab-bg` so they feed the
chain rather than bypass it). Face, hover-darken, and the selection wash
all inherit the one base. Inert with glass off: the fallback resolves to
the exact opaque surface it did before.
Brooklyn Nicholson
433f719676