CSS Introduction

Cascading Style Sheets (CSS) is a style sheet language used for describing the look and formatting of a document written in a markup language.

CSS was developed by the World Wide Web Consortium (W3C).

CSS defines how the HTML elements are to be displayed.

Styles are normally saved in external .css files. External style sheets give you an opportunity to change the appearance and layout of all the pages in a Website, just by editing one single file.