Foundation
Elevation
How BTS builds depth: surface steps, hairline borders and the convex button treatment.
Still drafting
This foundation is inventoried but the decision has not been made yet.
What this page is waiting on
Blocked on audit gap #8 — the --button-white-* tokens describe a ramp the .btn-white class does not use, so there is no honest source to document yet.
In the meantime
Follow the closest documented foundation and flag the gap. A rule invented on a single screen is how design systems drift, so raise it rather than settling it locally.