CSS Systems for writing maintainable CSS | Natalie Downe A CSS System is a reusable set of content-oriented markup patterns and associated CSS created to express a site's individual design. It is the end result of a process that emphasizes up-front planning, loose coupling between CSS and markup, pre-empting browser bugs and overall robustness. It also incorporates a shared vocabulary for developers to communicate the intent of the code. in Public bookmarkswith cssmaintainablenatbatpresentationstructuresystemtemplate