CSS has grown from a language for formatting documents into a robust languagefor designing web applications. Its simplicity is deceptive, however. It belies the complexity of the box model, stacking contexts, specificity, and the cascade. CSS mastery lies in understanding these concepts and how to take advantage of them.This book will show you how to write better, more efficient CSS, and to use the plethora of the new cutting-edge CSS features available to the front-end developer. You'll also learn to master tools that will improve your workflow.