Performance Requirements

| Metric | Target | Measurement | |---|---|---| | Page load time | < 2 seconds | Lighthouse, real user monitoring | | Build time | < 60 seconds | CI/CD pipeline | | First Contentful Paint | < 1 second | Lighthouse | | Cumulative Layout Shift | < 0.1 | Lighthouse | | Time to Interactive | < 3 seconds | Lighthouse | | Static export file size | < 50MB | Bundle analysis |

Accessibility Requirements

• WCAG 2.1 Level AA minimum compliance
• Color contrast ratios 4.5:1 for text
• All interactive elements keyboard accessible
• Proper ARIA labels and semantic HTML
• Screen reader compatible
• Focus visible on all interactive elements
• Form validation messages accessible

Browser Support

• Modern browsers: Chrome/Edge 90+, Firefox 88+, Safari 14+
• Mobile browsers: Chrome, Safari on iOS, Samsung Internet
• Graceful degradation for older browsers
• No JavaScript required for basic content reading
• Responsive design from 320px to 4K+

Mobile Requirements

• Fully functional on all device sizes
• Touch-friendly interactive elements (minimum 44x44px)
• Optimized for varying network speeds
• No horizontal scrolling required
• Readable on small screens without zooming
• Fast page load on 3G/4G networks

Reliability Requirements

• Uptime: 99.5% during business hours
• Zero data loss — all deployments are atomic
• Automatic rollback on deployment failure
• No single points of failure in static serving
• Graceful handling of missing assets

Security Requirements

• HTTPS required for all endpoints
• No sensitive data in public repositories
• Content Security Policy headers configured
• No XSS vulnerabilities (MDX sanitization)
• No dependency vulnerabilities in production
• Regular dependency updates

Maintainability Requirements

• Code organized in clear directory structure
• TypeScript for type safety
• Comprehensive documentation of architecture
• Automated testing for critical paths
• Clear separation of concerns
• Reusable component library