The gradient, grain and pointer light are decorative: one aria-hidden layer with pointer-events none that adds no role or tab stop. Children render above it in their own layer and stay fully interactive — the pointer is read from the root as events bubble, never captured. Text over the gradient needs its own contrast (a card or a scrim), since the colours move behind it. Under reduced motion every loop stops and each variant rests in a composed still layout, and the pointer light is not rendered; its spring is wrapped in MotionConfig reducedMotion="user". Touch input is ignored.