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caidanw
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modern-css

Refactor legacy CSS into modern native features with browser support guidance.

8|1|Updated Feb 16, 2026
Search Tags:#best practices#web development#frontend#css#styling#modern css
One-click install
npx skills add https://github.com/caidanw/skills --skill modern-css-caidanw
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: modern-css
Source: https://github.com/caidanw/skills/tree/main/modern-css
Command: npx skills add https://github.com/caidanw/skills --skill modern-css-caidanw

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps developers write modern, efficient CSS by replacing outdated hacks, workarounds, and JavaScript solutions with native CSS features, improving code quality and maintainability.

Core Features & Use Cases

  • Modern CSS Techniques: Teaches and applies modern CSS features for layout, animation, color, typography, selectors, and workflow.
  • Replaces Legacy Patterns: Identifies and refactors old CSS patterns (e.g., margin hacks, JS scroll listeners, Sass variables) into their modern native equivalents.
  • Browser Support Guidance: Provides clear guidance on when to use features based on browser support tiers (Widely Available, Newly Available, Limited Availability) and advises on fallbacks.
  • Use Case: When refactoring an old project, this Skill can identify a legacy absolute-centering hack and suggest using place-items: center with Grid, explaining the benefits and browser support.

Quick Start

Refactor the provided CSS to use modern CSS techniques, prioritizing widely available features.

Frequently Asked Questions about modern-css

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I replace old CSS hacks with modern native features?▼

Replace old CSS hacks by adopting native layout, animation, and color features. This skill identifies outdated patterns like margin hacks and JavaScript scroll listeners, refactoring them into maintainable modern CSS equivalents.

What is the best way to center a div using modern CSS instead of absolute positioning?▼

The best way to center elements using modern CSS is applying Grid with `place-items: center`. This replaces legacy absolute positioning hacks and provides a robust, native layout solution.

How do I check browser compatibility before using newly available CSS features?▼

Check browser compatibility by evaluating support tiers. This skill warns about limited availability for newer features, advising fallbacks and asking before applying techniques with less than 80% browser support.

Can I use modern CSS to replace JavaScript animations and Sass variables?▼

Yes, you can use modern CSS to replace JavaScript animations and Sass variables with native features. This improves code quality by eliminating external dependencies and legacy workarounds.

What are the limitations of using newly available CSS workflow patterns?▼

Limitations of newly available CSS workflow patterns include restricted browser availability. If a feature has less than 80% support, this skill requires asking before implementation and advises providing fallbacks.

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