Shape becomes a two-moment channel: resting form (Fase 1) + the morph (event).
Folded cross-modally into the existing `press-squeeze` contact firma — one press
now drives scale (motion) + shadow-flatten (depth) + corner-firm (shape): the
`continuous` corner squares up at the press peak (--shape-smoothing 2 -> 3 -> 2).
- `@property --shape-smoothing { syntax: <number>; inherits: true }` so the number
interpolates smoothly (mirrors the motion @property pattern).
- Set only at the keyframe peak -> interpolates from/to the element underlying
smoothing (respects a theme override). No-op for non-continuous corners (they do
not read --shape-smoothing). Degrades with reduced-motion via the firma system.
Material 3 Expressive is the only other system with shape morph (bespoke, closed);
this rides the unified firma — one event, many modalities.
Verified: check 0 errors; eidos config+motion+generated 78/78. Regenerated base.css.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
dev
7255a52a0a