Board Thread:Support Requests - Getting Technical/@comment-4370375-20151015224259/@comment-4731443-20151016184832

That's why Spottra suggested placing the margin on images rather than on navigation elements depending on how many there are. If every .pi-navigation has a margin-bottom of 0px, your headers won't be separated (which you wanted to avoid) no matter how many there are, and the image's margin-top will take care of placing the gap no matter how many navigations are above it.