app/assets/stylesheets/application.scss
// Bourban, Neat, Bitters
@import 'core';
// Presets – variables, colors, mixins
@import 'presets';
// Elements – overwrites element styles
@import 'elements';
// Layouts – grid
@import 'layout/containers';
// Components – bundles of styles applied to site components
@import 'components';
@import 'scheduled_messages';