Comprehensive guide to proven UI design patterns, components, and accessibility best practices for modern web and mobile applications.

• Covers 15+ core pattern categories including navigation (tabs, accordions, breadcrumbs, pagination, menus), forms (validation, multi-step, inline editing, search), data display (tables, cards, lists, grids, dashboards), and feedback (toasts, modals, loading states, empty states, badges)
• Includes detailed interaction patterns for drag-and-drop, infinite scroll, filtering, search, and undo/redo with best practices and code examples for each
• Provides WCAG-aligned accessibility guidance covering keyboard navigation, ARIA roles and attributes, screen reader support, color contrast, and form accessibility
• Covers responsive design strategies including mobile-first approach, adaptive layouts, mobile navigation patterns, touch interactions, and responsive table techniques
• Includes design tokens reference (colors, spacing, typography, borders, shadows), performance optimization tips, testing approaches, and links to popular design systems and component libraries