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- Slide-up entrance / slide-down exit animations (CSS keyframes) - Upward box-shadow for visual depth from page content - Larger toggle (44×24px) for easier tap target on mobile - Split dual-state Manage/Save into: header button Manage↔Close + panel Save choices button - ARIA: role=dialog, role=switch, aria-checked on toggle, focus moves to prefs on open - Use btn-outline / btn component classes for secondary/primary buttons Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>