Version-sensitive. Every API name, SDK gate and browser-support claim below was verified on 2026-09-08 against primary sources. What against, and when, is in . If that date is old, re-verify before acting on a version number. Motion Principles The foundation. Loaded by every creative skill invocation. Concise rules here. Deep-dive in . --- Timing Rules | Context | Duration | Why | |---|---|---| | Micro-interaction (toggle, hover, focus) | 100-150ms | Instant feedback, no perceived delay | | UI transition (modal, drawer, tab switch) | 200-300ms | Smooth but never sluggish | | Page/route transi…