css-modern - CSS Modern Features Guidance
Provide guidance on modern CSS features with browser compatibility and fallback strategies
Tags
Updated: 2026-03-20Capabilities
Typical Inputs
Typical Outputs
What this skill does
- provide custom properties guidance
- provide container queries guidance
- provide :has() selector guidance
- provide @layer guidance
- provide CSS nesting guidance
- display browser compatibility information
- provide fallback strategies
- validate feature parameters
Inputs
- feature type
- include fallback flag
- browser support flag
Outputs
- CSS guidance
- browser compatibility data
- fallback patterns
Requirements
- CSS fundamentals knowledge
- Modern browser support