Every full app surface. Dashboard, settings, editor, command console, onboarding — the system doing the work.
A horizontal wood-linear field along the lower half of a vertical surface. Rhythm at 950mm. Surface tension at 3mm reveal. Material logic — wood-linear, never panel. Proportion — 1 : 1.618.
The term lives at depth four. Atoms — rhythm, tension, wood, horizontal. Cultural mirror — Georgian to Victorian. The composer should produce twelve variations; pick the three with compressibility above 0.75.