Interaction & Motion Design — Purposeful Animation Framework

Motion Design Philosophy

"Animation is not about making things move. It is about making things feel alive." Motion connects interface states, communicates causality, and creates emotional resonance. Every animation must earn its milliseconds — gratuitous motion is worse than no motion at all.

Core Principles (Disney's 12 Principles, Adapted for UI)

1. Purpose over polish — every animation must serve a functional role: guide attention, show relationships, confirm actions, or create continuity
2. Physics-based movement — natural motion follows physical laws (acceleration, deceleration, spring, gravity)
3. Performance is non-negotiable — animations must run at 60fps; a janky animation is worse than no animation
4. Respect user preference — honor prefers-reduced-motion unconditionally; motion sensitivity is real and common
5. Subtlety scales — small animations compound; individually subtle, collectively they define the interface's personality

Animation Timing and Duration

Duration Guidelines