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css-non-blocking

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Use when reviewing stylesheets, component styles, and responsive behavior related to Load CSS without blocking render. Check the rendered layout across breakpoints and interaction states before proposing a fix.

skills/css-non-blocking/SKILL.md

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# Load CSS without blocking render

Render-blocking CSS delays First Contentful Paint—users see a blank screen while waiting for stylesheets to download and parse.

## Quick Reference

- Use `<link rel="preload" as="style">` with onload handler
- Inline critical CSS, defer non-critical styles
- Use media queries to split CSS by viewport/feature
- Modern: Next.js/Vite handle this automatically

## Check

Analyze this CSS loading implementation to ensure stylesheets are loaded without blocking the DOM parsing and rendering process.
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