Cascading Style Sheets

CSS or Cascading Style Sheets, is one of the three components that make up the basic building blocks of any web page. HTML is for creating the basic framework of a webpage, Javascript handles any coding features and interactive elements built into a page, while CSS handles the styling, like colors and font sizes. Or so the theory goes, anyway, but reality is a bit more messy.

HTML had many of the same things as CSS, but most of these are deprecated in HTML 5. CSS is preferred, especially in modern day, since HTML is not nearly as efficient, nor are it's standards as well maintained for those purposes.