Cursor blink, card-bar-pulse, sync spinner and the chat unread blink all have deliberate cadences — letting body.anim-fast/anim-slow speed them up turns them into unreadable strobes (or the sync icon spinning at 100ms). Higher-specificity rules pin each one to its natural duration via !important. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>