Preprocessor

stuff CSS @import Rule CSS @-rule have @import directive which is one of the most popular and helpful directive for web developer(s)/designer(s). Sass also extends the CSS @import rule to allow it to import SCSS and Sass files.

stuff CSS preprocessors are awesome. they adds functionality to css mainly in the form of abstraction like variables, mixins and super powers :). that's how they make development quicker, easier, maintainable, scalable and blah blah blah (things you can't do with CSS).