You need to add it to main.scss, at the end of the file or whoever in your source order is appropriate.
@import "common/global"; //@import "common/woo"; @import "components/buttons"; @import "components/comments"; @import "components/forms"; @import "components/grid"; @import "components/wp-classes"; @import "layouts/header"; @import "layouts/sidebar"; @import "layouts/footer"; @import "layouts/pages"; @import "layouts/posts"; @import "layouts/tinymce"; @import "pages/home"; @import "pages/product-category"; @import "pages/product-single"; @import "pages/about-us"; @import "components/yamm3";
// Add here < - - - - - -
See screen shot bellow: