Activity feed rendered as a carbon-paper multi-part form: one strike lands on the top ply at full density and echoes down through 4-5 contiguous, fully-visible ply rows, each registering 90ms after the one above at 0.68x the density, matching real pressure-copy force dissipation through a stack.
npx shadcn@latest add https://design.helpmarq.com/r/carbon-ply-fade.jsoncarbon-ply-fade