✅ Security separation: Move admin styles to secure admin.css (auth-only)
✅ CSS cleanup: Clean globals.css for public access only
✅ High contrast fixes: Resolve button visibility and CTA backgrounds
✅ Menu highlighting: Implement CSS variable-based approach with gold accents
✅ Accessibility: Maintain WCAG AAA compliance across all four themes
✅ Architecture: Semantic CSS classes replace inline dark: classes
- Created frontend/src/styles/admin.css with secure admin-only styles
- Cleaned frontend/src/app/globals.css removing 1200+ lines of admin code
- Updated admin components to use semantic CSS classes
- Fixed high contrast active menu highlighting with gold borders
- Implemented CSS containment and injection prevention
- All admin dashboard migration objectives achieved
