[18] Inheritance depends over the document tree, which is the hierarchy of XHTML components in a page based on nesting. Descendant factors might inherit CSS property values from any ancestor factor enclosing them. A really thorough help manual is specified together with the Prestashop social media login addon to configure https://www.presta-addons-modules.com/en/front-office/prestashop-social-media-side-bar-links-buttons-on-all-pages.html