Remove Space Between Header Image and Page Title

Hello,
I’m trying to remove space below the header image (between header image and page title). I’ve been able to eliminate some of it by changing .site-content margin: to 0. This seems to eliminate space directly above where the page title was (I removed page titles on my site). When I look at the remaining space, nav#lower-navigation.main-navigation seems to be making it. .main-navigation controls the upper navigation menu and I can’t find any where to change lower-navigation. I’m missing something, could you help me out with this.
Thanks, Lee