

CSS Guide 2021
As a web developer of 25 years, I’ve been working with CSS for the last 15 years. I’ve put together a CSS guide of my favorite resources and the best of the new resources on this evolving technology.
New and Notable
- 2020 Roundup of Web Research
- Modern CSS Solutions for Old CSS Problems
- Ahmad Shadeed – CSS Articles – My current favorite source for excellent explainer articles on CSS.
- How does stuff get added to CSS? Adam Argyle answers!
Essential Documentation
- CSS: Cascading Style Sheets (MDN)
- CSS Reference
- CSS Tutorial – W3 Schools
Tools
Tutorials and Courses
- Modern CSS Design Systems – Level Up Tutorials
- Learn CSS Variables in 5 minutes – A tutorial for beginners
- A Smashing Guide to CSS Layout
- Learn CSS, from Laying Out Websites to Performant Animations – FrontEnd Masters
- 20 CSS Flexbox Tutorials, Guides, and Tools