Every other surface in Binectics is a tool. This is the one place — the second the door opens — where motion is the feature, not the finish. A 2‑second sequence, four members, one set of rules.
Spatial continuity. The viewfinder, the ring, the photo frame all share one center. The eye never has to reorient.
Earn the moment. This sequence happens; nothing else in Binectics animates this much. Familiarity makes it land.
Respect reduced motion. All @media (prefers-reduced-motion) collapses to a 200ms cross‑fade.