perf(SegmentedControl): Scope :has(:focus-visible) to direct child for O(1) lookup #7331
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…r O(1) lookup Part of #7312
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Summary
Performance optimization for SegmentedControl CSS selector to improve INP.
Changes
Scope
:has(:focus-visible)to direct child with>combinator.Expected INP Impact
Why this matters
Focus state changes are high-frequency interactions. The
:has(:focus-visible)selector fires on every focus/blur event. Scoping to direct children eliminates subtree traversal during keyboard navigation.Part of the INP performance optimization effort. See #7312 for full context.