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- Update globals.css reduced-motion block: 0.01ms → 0.001ms durations and add scroll-behavior: auto to suppress all transitions/animations when OS reduced-motion preference is active. - Gate canvas-confetti burst in GameModal behind matchMedia check so the particle effect is skipped entirely for users who opt out of motion. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>