An identity system describes what belongs together. Its motion language explains how those things behave when a person encounters them.
Rhythm, acceleration and pause carry meaning. A deliberate stop can feel precise; a soft arrival can feel welcoming. These choices belong to the same discussion as type and colour.
Document relationships rather than hundreds of examples. A few clear principles travel further than a collection of isolated animations.
Test the vocabulary in practical settings: a short social sequence, a loading state and a transition into a long article. Each situation asks for a different level of attention.
Reduced motion is part of the system. A recognisable still frame and a direct transition should preserve the same hierarchy and personality.
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