- Fix color contrast: change #179e83 to #148069 for WCAG AA compliance
- Add ARIA attributes to mobile nav toggle (aria-expanded, aria-controls)
- Implement focus trap on mobile menu with Escape key support
- Add aria-hidden to decorative hero SVG
- Add ARIA validation to contact form (aria-invalid, aria-describedby)
- Fix touch target sizes (notification close button 48x48px)
- Fix form session expiration by relaxing timestamp validation
- Add cache busting (v1.1.0) to JS/CSS files
- Update service worker cache version to force refresh
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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