15% of the world's population has some form of disability. Accessibility (a11y) is not just an ethical responsibility — it's a business opportunity. WCAG 2.2 standards rest on four principles: Perceivable, Operable, Understandable, Robust.
Practical steps: alt text for all images, keyboard navigation, ARIA attributes for complex components, contrast ratio above 4.5:1, visible focus indicator. Auto-testing with axe DevTools or Lighthouse is possible, but manual testing is also necessary — especially with a screen reader.
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