User Agent Style Sheets: Basics and Samples · Jens O. Meiert

http://meiert.com/en/blog/20070922/user-agent-style-sheets/



CSS budgets for default formatting of documents by the user agent style sheet concept, a cornerstone of the cascade. It means that a web browser doesn’t just present a line of text when it’s fed with an HTML document that has no styling information attached, but instead serves it using minimal formatting.