1. Codrops
    An extensive CSS reference offering way more content than MDN
  2. Can I use
    Interactive browser support tables for CSS (and HTML5).


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


  1. The cascade
    This article explains what the cascade is and how this affects you.
  2. Specificity and inheritance
    Understanding specificity and inheritance is important to master CSS. This article will help.
  3. CSS Box Model
    An article explaining the foundation of layout on the web.


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


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


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


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


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


  1. A Complete Guide to Flexbox
    All you need to know about Flexbox on one page.
  2. Flexbox playground
    Play with Flexbox examples on CodePen.
  3. Flexbox Defense
    A tower defense game in the browser to learn about Flexbox with fun.
  4. Flexbox Froggy
    Learn all the basics of Flexbox with a fun game involving frogs and lily pads.
  5. Flexbugs
    Community-curated list of flexbox issues and cross-browser workarounds for them.
  6. Flexbox Zombies
    A training course driven by a storyline where you use Flexbox and a crossbow to hunt zombies.
  7. What the Flexbox?
    A simple, free 20 video course that will help you master CSS Flexbox!


  1. A Complete Guide to Grid
    All you need to know about CSS Grid Layout on one page.
  2. Grid by Example
    Besides examples of how to use Grid this site also has additional useful learning resources.
  3. Designing with Grid
    Talk about the new layout possibilities CSS Grid is offering.
  4. Grid Garden
    Lovely game where you write CSS code to grow your carrot garden.
  5. GridBugs
    Community-curated list of Grid interop issues and workarounds for them.
  6. Grid Critters
    Learn CSS grid layout by mastering an adventure game.


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

Thanks for this great resources. Appreciate :+1: