responsive-design

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Implement modern responsive layouts using container queries, fluid typography, CSS Grid, and mobile-first breakpoint strategies. Use when building adaptive interfaces, implementing fluid layouts, or creating component-level responsive behavior.

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Summary

Modern responsive layouts using container queries, fluid typography, CSS Grid, and mobile-first strategies.

Container queries enable component-level responsiveness independent of viewport size, with support for container query units (cqi, cqw, cqh) and style queries
Fluid typography and spacing via CSS clamp() scales smoothly across screen sizes with min/max bounds, eliminating discrete breakpoint jumps
CSS Grid auto-fit/auto-fill patterns and Flexbox provide intrinsic layouts that adapt based on content; subgrid enables nested alignment
Mobile-first media query approach with content-based breakpoints and feature queries (@supports) for progressive enhancement across browsers

Raw SKILL.md

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---
name: responsive-design
description: Implement modern responsive layouts using container queries, fluid typography, CSS Grid, and mobile-first breakpoint strategies. Use when building adaptive interfaces, implementing fluid layouts, or creating component-level responsive behavior.
---

# 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

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