This article introduces you to Cascading Style Sheets (CSS)—and advanced technology used to build modern web pages and explains how this technique can be used to improve the quality of websites and optimise their future support.

As your business grows and develops, so will your website. When you build it today, you should already be taking into account how you might want to improve it in the future including possible modifications to its look and feel and even complete change of the visual design.
We view websites via so-called browsers—the software built to explore websites and make the best use of their functionality and features. The most popular browsers are Internet Explorer and Firefox, but there are many others. They allow us to see web pages as formatted text. The web pages are formatted using a special markup language called HTML (Hypertext Markup Language) and the browsers interpret the HTML to present the web pages to us properly. HTML is also read by mobile phones, screen readers and other devices.
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