Also, user agents with no CSS support will be able to display style-enhanced documents. Of course, the stylistic enhancements made possible by CSS will not be rendered, but all content will be presented. Complementary to structured documents . It should be easy to change the style sheet with little or no impact on the markup. Vendor, platform, and device independence .
Style sheets enable documents to remain vendor, platform, and device independent.
By pointing to style sheets from documents, webmasters can simplify site maintenance and retain consistent look and feel throughout the site. For example, if the organization's background color changes, only one file needs to be changed. CSS2 is more complex than CSS1, but it remains a simple style language which is human readable and writable. The CSS properties are kept independent of each other to the largest extent possible and there is generally only one way to achieve a certain effect. Network performance .