Ruixen UI

Ruixen UI exists because CSS transitions don't feel like anything. They're mathematical curves pretending to be motion. Real motion has weight: it overshoots, it settles, it responds to interruption. That's what spring physics gives you. Every one of the 170+ React components in this library is built on real spring dynamics: stiffness controls snap, damping controls resistance, mass controls weight. The result is UI that feels like it exists in the physical world. Four registry variants: Tailwind v4, Tailwind v3, Radix, and Base UI, so the library fits your stack, not the other way around. Every component is designed and engineered by hand. One shadcn CLI command to install. Full source ownership. No runtime dependency.