Cascading Style Sheets — or CSS — is the first technology you should start learning after HTML. While HTML is used to define the structure and semantics of your content, CSS is used to style it and lay it out. For example, you can use CSS to alter the font, color, size, and spacing of your content, split it into multiple columns, or add animations and other decorative features.... CSS layout At this point, we've already looked at CSS...also CSS on MDN The main entry point for CSS documentation on MDN...