Sprung wave lattice: depth-graded rows of smooth lines ride an orbital noise field with woven coherence while a slow autonomous swell front rolls through every ~8s. Cursor swipes inject velocity impulses along the travel direction, proportional to cursor speed, then spring home on damped Hooke springs with a tanh soft-clip on stretch. Deep-sea steel default. Canvas 2D, seeded, offscreen-paused, DPR-clamped with device-pixel-aligned strokes, reduced-motion-safe (crest frozen mid-roll); idles on its own when untouched — a seeded ghost cursor swipes through.
pnpm dlx shadcn@latest add "https://crucibleui.com/r/swell.json"