We use Libsass as our CSS preprocessor of choice. If you’re not familiar with Sass, it lets you use variables, nesting, and mixins (to name a few). [Learn more about Sass](http://sass-lang.com/).
## Inlining
-One of the biggest headaches and time-sucks used to be inlining your HTML email. Well, no more! We’re using gulp-inline to to scan your CSS file and and automatically inject your CSS when you’re ready. Just run `npm run build` in your project when you’re ready to inline.
+One of the biggest headaches and time-sucks used to be inlining your HTML email. Well, no more! We’re using gulp-inline to to scan your CSS file and automatically inject your CSS when you’re ready. Just run `npm run build` in your project when you’re ready to inline.
## Build Options
By default the inliner works without removing whitespaces and inlining for you, you have to change your settings in the inliner function (`function inliner(css)`) on your gulpfile.babel.js which is the root of your project. To change these settings go and update this part of the function as you wish: ``` .pipe($.htmlmin, { collapseWhitespace: true, minifyCSS: true }); ```.