Сасс Учебное пособие. SASS (синтаксически Удивительный Stylesheet) является CSS предварительно процессор
Sass Tutorial
SASS (Syntactically Awesome Stylesheet) is a CSS pre-processor, which helps to reduce repetition with CSS and saves time. It is more stable and powerful CSS extension language that describes the style of document structurally. This tutorial covers the basics of SASS.
This tutorial will help both students as well as professionals, who want to make their websites or personal blogs more attractive.