Install compass-susy-plugin by entering the following commands in the terminal:
sudo apt update sudo apt install compass-susy-plugin
Sass power-tools for web layout
Compass is a CSS authoring framework which uses the Sass stylesheet language to make writing stylesheets powerful and easy. . Susy is a semantic CSS grid system with a responsive twist. . Susy grids are fluid on the inside, ready to respond at any moment, but contained in the candy shell of your choice, so they respond how and when and where you want them to. They don't design your site or dictate your markup, just do the math and get out of your way.