On the home page I have a header with titles in h2, and underneath there are posts showing also with the title in h2. On mobile it looks fine, but on desktop de titles are now too small. In the header it needs to be small because otherwise the text gets cut off. But when I change the font size of the header h2 titles, the titles in the posts underneath are also changing, and now they are too small. And also, there is a strange white margin underneath those titles. How can I get rid of that?