If you’re using the Sass version of the theme, I’m going to assume you know how to install a WordPress theme. If you need a quick reminder, check out the JointsWP-CSS install instructions – the installation process is the same.
Sass File Structure Overview
All of the Sass files can be found in the assets/sass directory. The theme enqueues the assets/css/styles.min.css file for styles.
The Foundation files are imported from the vendor directory, but don’t make changes to those files, as they will be overwritten if you ever update Foundation.