CSS, or Cascading Style Sheets, solve an important problem of web development: how to make your web site look nice. Styling your apps makes them more usable and nicer-looking; you can also use CSS to create Responsive Web Design (RWD) - allowing your apps to look good no matter what screen size they are displayed on. CSS is not only about making your app look nice; its spec includes animations and transforms that can enable sophisticated interactions for your apps. The CSS Working Group helps maintain current CSS specifications; you can follow their work at [World Wide Web Consortium's site](https://www.w3.org/Style/CSS/members).
> Note, CSS is a language that evolves, like everything on the web, and not all browsers support newer parts of the specification. Always check your implementations by consulting [CanIUse.com](caniuse.com).
> Note, CSS is a language that evolves, like everything on the web, and not all browsers support newer parts of the specification. Always check your implementations by consulting [CanIUse.com](https://caniuse.com).
In this lesson, we're going to add styles to our online terrarium and learn more about several CSS concepts: the cascade, inheritance, and the use of selectors, positioning, and using CSS to build layouts. In the process we will layout the terrarium and create the actual terrarium itself.
saivishnu725
4 years ago