A turning ring of light around something, for the AI at work. It wraps its content, which keeps its own surface; the ring is the wrapper's padding, painted by a conic gradient whose angle is animated.

tone picks the color (:ai amber, :learning violet, :ok, :risk). variant is :spin (one light going round), :dual (two tones going round, the second one learning) or :glow (no ring, a halo that breathes). size is the ring's width. The animation stops under prefers-reduced-motion, leaving the ring still.