Every interactive control now acknowledges input: buttons and icon
buttons press down (scale on :active) and ease their hover states, nav
items, menu rows, segmented controls, cards, table rows, and inputs
transition over shared motion tokens (120/200/280ms, ease-out curves).
Dialogs and popovers enter with a short rise + fade over a fading
backdrop; switching routes and onboarding steps plays a quiet view
entrance keyed on the route/step. State pills cross-fade their tones
as runs progress. All motion collapses under prefers-reduced-motion.
PRODUCT.md captures the register and design principles guiding this.
ZacharyZhang-NY
d8e9779678