What is CSS (Cascading Style Sheets)?

Cascading style sheets, or CSS, is a style sheet language that makes up a large part of the internet, along with HTML, JavaScript, and other frameworks. CSS allows developers to add and separate different types of fonts, colors, and layouts that are used on web browsers. CSS is also used to allow for variations in display across different device and screen types used on mobile phones, tablets, computers, and other related hardware. The CSS format was registered with the World Wide Web Consortium (W3C) during the spring of 1998 when the internet started to become more mainstream.