\!h ----- Custom css file
Создаём assets/scss/custom/style.scss
Добавляем в assets/scss/theme.scss
// Custom
// -----------------------------------------------------------------------------
@import "custom/style";
\!h ----- Foundation
assets/scss/settings/global/_global.scss
// Set these to true so that Foundation styles are exposed from Citadel
$include-html-classes: true !default;
$include-print-styles: true !default;
$include-html-global-classes: $include-html-classes !default;
Info
https://github.com/bigcommerce/cornerstone/pull/1047