An awesome list limited to the best CSS learning resources

This list is mainly about CSS – the language and the modules. Not about naming conventions, architecture paradigms, frameworks, pre-processors, post-processors or other aspects of todays CSS ecosystem.

Please read the contribution guidelines before contributing.

• CSS References
• CSS in a nutshell
• Fundamental concepts
• CSS units
• Selectors
• Custom properties (aka CSS variables)
• Layout
• Animation

• codrops - An extensive CSS reference offering way more content than MDN.
• Can I use - Interactive browser support tables for CSS (and HTML5).

• Introduction to CSS - This Screencast series will teach you the basics of CSS in about one hour.

• The cascade - This article explains what the cascade is and how this affects you.
• Specificity and inheritance - Understanding specificity and inheritance is important to master CSS. This article will help.
• CSS Box Model - An article explaining the foundation of layout on the web.
  • Also have a look at the detailed information about the box-sizing property.

• The Lengths of CSS - Overview covering absolute and relative units.
• Fun with Viewport Units - Imparts the basics and shows some nifty use-cases.

• Basic CSS Selectors - An introducing to the very basic CSS selectors you need to know.
• Advanced CSS Selectors - Level up your knowledge. From attribute selectors to CSS3 pseudo classes.
• CSS Dinner - Learn how to use CSS selectors with this fun little game.

• CSS Variables: Why Should You Care? - A short introduction to CSS variables.
• Locally Scoped CSS Variables: What, How, and Why - Describes the advantages of locally scoped CSS variables.
• Using CSS variables correctly - Patterns and anti-patterns for using CSS variables.
• Everything you need to know about CSS Variables - In depth article going beyond the basics of CSS Variables using real-world examples.
• Getting Reactive with CSS - Mindblowing talk about the possibilities of the combination of CSS variables and functional reactive programming in JavaScript.

• Learn CSS Layout - Learn about CSS layout techniques in 5 chapters.
• Layout Land - Jen Simmons video series about the new CSS Layout possibilities.
• Laying Out The Future With Grid And Flexbox - Introduction of a new layout system encompassing Flexbox, CSS Grid and the Box Alignment Module.

• Floats - In depth information about how to use (and clear) floats.
• Positioning Types - A closer look at a few little-known things related to the CSS positioning layout method.
• inline-block - Shows in which cases it makes sense to use the display property inline-block for layouting.

• A Complete Guide to Flexbox - All you need to know about Flexbox on one page.
• Flexbox playground - Play with Flexbox examples on CodePen.
• Flexbox Defense - A tower defense game in the browser to learn about Flexbox with fun.
• Flexbox Froggy - Learn all the basics of Flexbox with a fun game involving frogs and lily pads.
• Flexbugs - Community-curated list of flexbox issues and cross-browser workarounds for them.
• Flexbox Zombies - A training course driven by a storyline where you use Flexbox and a crossbow to hunt zombies.

• A Complete Guide to Grid - All you need to know about CSS Grid Layout on one page.
• Grid by Example - Besides examples of how to use Grid this site also has additional useful learning ressources.
• Designing with Grid - Talk about the new layout possibilities CSS Grid is offering.
• Grid Garden - Lovely game where you write CSS code to grow your carrot garden.

• CSS Transitions and Transforms for Beginners - An introduction to to CSS transitions and CSS (2D) transforms.
• All you need to know about CSS Transitions - Also addressing advanced topics from chaining and events to hardware acceleration and animation functions.
• CSS 3D transforms - Multi page tutorial with examples like card flip and carousel effects.
• CSS Animation for Beginners - Imparts the concepts of CSS animations with keyframes.
• animatable - Nice little page demonstrating which CSS properties are animatable.

To the extent possible under law, Michael Kühnel has waived all copyright and related or neighboring rights to this work.