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The concept of CSS dates back to 1997, when it was created so web developers could easily set apart their web pages’ design from their content. However, it took more than 3 years since then for CSS to really be used. 

Today, almost all of the popular browsers support CSS and there are very few web designers who don’t use CSS for web design and development. So, what exactly is CSS? For starters, it stands for Cascading Style Sheet. A Style Sheet is a document that has technical specs for a layout. Style sheets are used on webpages to ensure that the design is just like the specifications and they also help the browser extract the document currently in use.

Adding Cascade to Styling Sheet makes CSS. And this Cascade makes it popular. CSS works to define the layout of HTML documents. Thus, CSS encompasses elements of HTML documents like font, color, text size, background images, margins, lines, and much more. This makes CSS a lot more advanced than HTML, as it offers more options and is more efficient.

CSS is mainly used to design web pages along with styling XHTML and XML markup. It also provides control over a web page’s layout. Thus CSS doesn’t just help simplify the styling of web pages but also helps web designers as they can easily change the style of a site through CSS. Existing styling sheets can be altered in a snap and sites can make other changes without worrying about altering XHTML. 

CSS is not a tool that can be bought or used, but is rather a tool that designers can learn to simplify their process. It is a complex concept to learn but once the first properties of CSS Level 1 are clear, CSS Level 2 becomes easier.