CSS, or Cascading Style Sheets, is a language used to describe the formatting of a document written in a markup language. Many one page websites use CSS to control their site’s styles fonts, colors, padding etc – all in a single file.
CSS3 is based on ‘CSS’, but with a modular structure which allows designers to build content-rich single page sites with lightweight code. With CSS3, one pagers can have striking visual effects, better user interfaces, and load faster and more easily than ever before.