Cascading Style Sheets (CSS) is a language used to style an HTML document. A typical website has a single CSS file that stores the styles for any given area of a website. In it’s simplest form, CSS can control font styles, such as; size, color, weight and font family. It’s main purpose is to enable a way to separate content from the design of a website or document. This code can be embedded in the <head></head> tags of an HTML document or used in an external file, which is preferred.
HTML was never intended to have formatting. It’s intention was to define the content of the document. CSS, as we know it today, was developed by the World Wide Web Consortium after nine style sheet languages were proposed through their mailing list. Style sheets have been used since the 1970′s.
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