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Review catch, and a bad one: the previous commit anchored its insertion on `padding: 0.5rem 0.75rem;` and closed .sectionNav there. Everything that followed in the rule — margin-bottom, box-shadow, display: flex, align-items, gap — was orphaned into .sectionNavSheetOpen, which is only applied while the mobile jump sheet is open. So the sticky nav lost its flex layout, spacing and shadow in the closed state, which is virtually every page view on every school detail page. A site-wide regression introduced by a fix for one mobile menu. Redone by anchoring on the complete rule, closing brace included, so nothing can be orphaned. .sectionNav is now byte-identical to main and the diff is purely additive; .sectionNavSheetOpen carries the z-index and nothing else. The staging experiment that validated this fix set nav.style.zIndex = '1100' with every other declaration intact, so it was always testing this version rather than the broken one. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>