Cursor fluid: moving the pointer through a full-bleed dark field sheds a von Karman vortex street of alternating-sign vortices that drift downstream and decay, revealed by ~600 velocity-aligned tracer streaks; clicking drops a counter-rotating vortex pair that stirs the field for exactly 3 seconds.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/hero-vortex-street.json"