css-modern - Modern CSS Features Guide
Provides guidance on modern CSS features with browser compatibility and fallback strategies
Tags
Updated: 2026-03-20Capabilities
Typical Inputs
Typical Outputs
What this skill does
- explore custom properties
- explore container queries
- explore has selector
- explore cascade layers
- explore CSS nesting
- explore logical properties
- display browser support
- display fallback patterns
Inputs
- feature parameter
- include_fallback flag
- browser_support flag
Outputs
- feature guidance
- code examples
- browser compatibility information
- @supports fallback patterns
- progressive enhancement patterns
Requirements
- css-fundamentals skill