responsive-design

# Responsive Design Master modern responsive design techniques to create interfaces that adapt seamlessly across all screen sizes and device contexts. ## When to Use This Skill - Implementing mobile-first responsive layouts - Using container queries for component-based responsiveness - Creating fluid typography and spacing scales - Building complex layouts with CSS Grid and Flexbox - Designing breakpoint strategies for design systems - Implementing responsive images and media - Creating adaptive navigation patterns - Building responsive tables and data displays ## Detailed patterns and worked examples Detailed pattern documentation lives in `references/details.md`. Read that file when the navigation tier above is insufficient. ## Best Practices 1. **Mobile-First**: Start with mobile styles, enhance for larger screens 2. **Content Breakpoints**: Set breakpoints based on content, not devices 3. **Fluid Over Fixed**: Use fluid values for typography and spacing 4. **Container Queries**: Use for component-level responsiveness 5. **Test Real Devices**: Simulators don't catch all issues 6. **Performance**: Optimize images, lazy load off-screen content 7. **Touch Targets**: Maintain 44x44px minimum on mobile 8. **Logical Properties**: Use inline/block for internationalization ## Common Issues - **Horizontal Overflow**: Content breaking out of viewport - **Fixed Widths**: Using px instead of relative units - **Viewport Height**: 100vh issues on mobile browsers - **Font Size**: Text too small on mobile - **Touch Targets**: Buttons too small to tap accurately - **Aspect Ratio**: Images squishing or stretching - **Z-Index Stacking**: Overlays breaking on different screens