WORK-432
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ID:WORK-432Status:ready

Motion dimension CSS + tokens

SPEC-105 §4: a single dimensions/motion.css + motion tokens that render each reveal character — covering all section runes from one stylesheet, with the transform-composition and global-hook rules that keep it from becoming per-rune work.

Priority:highComplexity:moderateMilestone:v0.24.0Source:SPEC-105
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Criteria completion

Criteria completion: 0 of 4 (0%) checked; tracking started on Jun 15, no incremental history yet0%25%50%75%100%Jun 15Jun 15

Tracking started Jun 15 — check back for trends.

Relationships

Implements 1
Related 5
Branches 5
main current ready
claude/milestone-v0.24.0-split readychangeset-release/main readymain readyclaude/v023-bg-motion-breakdown readyclaude/defer-work-417 ready

Scope

  • dimensions/motion.css — per-character keyframes/transitions keyed on data-reveal × data-in-view, plus the stagger delay (calc(var(--rf-reveal-index) * var(--rf-reveal-stagger))).
  • Motion tokens (tokens/) — duration, easing, travel distance, scale start, stagger interval; theme retunes character (calm vs punchy) purely via tokens.
  • Global hooks, not structure — root entrance keys on [data-reveal][data-in-view]; stagger targets the engine's index marker ([data-stagger][data-in-view] [style*="--rf-reveal-index"]), never > *. No rune's own CSS file gains a motion block for the baseline.
  • Transform composition (critical) — reveal animates the individual translate/scale properties, never the transform shorthand, so it composes with the ~48 Lumina files already using transform (hover-lifts, frame displacement, drawer/nav) instead of clobbering them.
  • blur downgrade — documented (and theme-applied) fallback to fade; all other characters animate compositor-only properties. Reduced-motion handled by the existing global reset (WORK-352).
  • Per-part choreography (__content/__media offset) is opt-in polish, demonstrated but not required.

Acceptance Criteria

  • A dimensions/motion.css + motion tokens define each character keyed on data-reveal × data-in-view; the theme owns duration/easing/distance/scale/stagger as tokens.
  • Global coverage, not per-rune: all section runes are covered from one stylesheet — root keys on [data-reveal][data-in-view], stagger on the --rf-reveal-index marker (not > *); no rune CSS file gains a baseline motion block.
  • Transform composition: reveal uses the individual translate/scale properties, never the transform shorthand; verified against at least one hover-transform rune (card/cta) that it composes rather than clobbers.
  • blur documents/applies a downgrade to fade; other characters animate compositor-only props; CSS coverage passes for the new selectors.

Dependencies

  • WORK-431 — consumes data-reveal/data-stagger/--rf-reveal-index.

References

  • SPEC-105 §4 · packages/lumina/styles/dimensions/ (precedent: state.css), packages/lumina/tokens/ · reduced-motion reset WORK-352 (global.css).