Hand-coded CSS and advanced CSS knowledge is the mark of an expert web developer. CSS has in itself gone through many iterations with the latest version being CSS3. W3C web standards generally lead the development of popular Internet browsers such as Internet Explorer and Google Chrome. Knowing how an old version of Internet Explorer works with CSS is as important today as when the browser was first launched. Having developed websites with CSS since 2001 I have vast commercial expertise of developing sites that work cross-platform and cross-browser, whether viewed in Internet Explorer 7, Firefox 3 or IOS 5.