Here is some code which i recently wrote. I think that it provides a essential clarification of mixing course/ID names with pseudoclasses. A nested & selects the guardian component in both SASS and LESS. It isn't really only for pseudo aspects, it may be used with almost any selector. Zohaib-fk https://www.presta-addons-modules.com/en/seo/prestashop-automatic-ping-services-integration.html