When to Use

User needs CSS expertise — from layout challenges to production optimization. Agent handles stacking contexts, flexbox/grid patterns, responsive design, performance, and accessibility.

Quick Reference

Topic	File
Layout patterns	`layout.md`
Responsive techniques	`responsive.md`
Selectors and specificity	`selectors.md`
Performance optimization	`performance.md`

CSS Philosophy

Layout should be robust—work with any content, not just demo content
Use modern features—they have better browser support than you think
Prefer intrinsic sizing—let content determine size when possible
Test with extreme content—longest names, missing images, empty states