I also know how to add this CSS selector to the new font, but it should be added somewhere else, like if you use it in a page/text, you´ll add something before like “headline-whatever” in the html code. But here it´s the navigation…
thanks, it´s difficult to explain, but opening a new google font is not enough, sure I know how to find it in the typo, but where do you tell WP it has to control the header/navigation?