Uploaded June 2022 | Updated September 2026, 2 hours ago

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An in-depth guide to CSS Cascade Layers that will help you write easily maintainable stylesheets and deal with CSS specificity more efficiently.

📚 Resources
Codepen Demo: codepen.io/ZoranJambor/pen/abqaroL/fb7a10b04df4ec860a905b67af725f62
Browser Support: caniuse.com/?search=cascade%20layers
MDN: developer.mozilla.org/en-US/docs/Web/CSS/@layer
A Complete Guide to CSS Cascade Layers by Miriam Suzanne: css-tricks.com/css-cascade-layers
Hello, CSS Cascade Layers by Ahmad Shadeed: ishadeed.com/article/cascade-layers
Getting Started With CSS Cascade Layers by Stephanie Eckles: smashingmagazine.com/2022/01/introduction-css-cascade-layers

📖 Chapters
00:00 Introduction
00:36 How CSS Specificity works
02:57 How CSS Cascade Layers work
05:10 How to use Chrome DevTools to debug CSS Cascade Layers
06:26 Unlayered styles take precedence over layered styles
07:15 Adding styles to an existing layer
08:39 Defining Multiple CSS Cascade Layers at once
09:59 Importing styles into a specific layer using @import
10:49 Importing styles into a specific layer using "link" attribute
11:27 Nesting CSS Cascade Layers
14:58 Reverting layered styles
15:34 How !important works in CSS Cascade Layers
17:00 Use cases for CSS Cascade Layers
17:51 Conclusion

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- Zoran Jambor
#css #specificity