A stack of cards that fans out on hover or keyboard focus and restacks on leave or blur. A tap toggles it on touch. Each card rotates around a point below the stack, with a short stagger. Card content is a slot; spread angle and gap are props. Transform-only, no motion on first render, instant under reduced motion.
pnpm dlx shadcn@latest add "https://ui.knowns.dev/r/fan-stack.json"