Jekyll does support SASS and SCSS, the documentation can be found at sass-lang.com. These both techniques are a kind of pre-compiler or pre-processor to generate css - cascading style sheets. This blog uses jekyll as a static site generator, so we can use SCSS as well.
To reuse sass or scss code Mixins were introduced. Mixins helps to keep the code cleaner and easier to maintain. With Mixins you can created nested css-styles, use css-fallbacks as a single command, reuse group…