@media rules, in conjunction with media queries (formerly only media varieties), Manage which styles are applied and which aren't based on what media the page is remaining shown in. In my code instance, only when printing a document must all text be set in black from a white (the paper) https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-open-graph-twitter-cards-tags-on-all-pages.html