Updated May 20th, 2001 4:56 AM

Simple CSS can get you pretty far, but once you start getting serious about front-end development, you need to get exposed to more advanced topics, such as specificity, floating, and responsive design. These courses teach you some best practices for working with CSS and building responsive websites. Once you’ve built your fair share of web pages, you might notice much of your time is spent reinventing components like grids, navigation, and calls to action. In these courses, you’ll learn how using a framework can speed up your site creation process.