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Phase 1 - Screen Reader Critical: - Add aria-label to main navigation - Add accessible names to icon-only buttons (GitHub, theme toggle, close) - Add aria-hidden to decorative SVGs and emoji icons - Add role=dialog, aria-modal, aria-labelledby to modal - Add skip link with visible focus state Phase 2 - Keyboard Navigation: - Implement focus trap in modal (Tab/Shift+Tab cycles) - Return focus to trigger element on modal close - Replace outline:none with visible focus rings - Add keyboard navigation to install dropdown (arrows, escape) - Add aria-expanded to dropdown toggles Phase 3 - Dynamic Content: - Add aria-live=polite to results counts and loading states - Add role=listbox to search results - Add role=list to resource lists - Add role=menu/menuitem to dropdown menus Phase 4 - Forms & Labels: - Add .sr-only utility class for screen reader text - Add visually hidden labels to all search inputs - Add aria-label to filter dropdowns Files modified: - BaseLayout.astro, Modal.astro (ARIA attributes) - modal.ts (focus trap, keyboard navigation) - global.css (sr-only, skip-link, focus styles) - All page files (labels, live regions, roles)