At `full` (--radius-full = 9999px) the border-radius caps to half each
element's shorter dimension. A tall card and its 16:10 cover cap to
different values, so they can never be concentric — the nest inset broke
("el borde interior no sigue el radio exterior").
Concentric nesting requires FINITE radii; `full` is for leaf elements
(chips, buttons, avatars, pill inputs). So at `full` the demo now:
- gates `[data-shape-nest]` off and dims the "radios concéntricos" toggle
with «n/a a full — geometría de hoja»
- drops the cover to a clean --radius-xl (.cover-full) instead of a
mismatched pill
Documented the finite-only constraint in SHAPE_ENGINE_RFC §5 + THEMING §30.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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