Display Issue On Mobile Devices

I love the theme, but I’m having an issue on mobile browsers (both Chrome on Android and Safari on iPhone) with the front page display. The titles of the top two entries are being overlaid by the header banner and menu. I tried adjusting the spacing between the header and body but that didn’t seem to change the spacing on Android at all.

Here’s a screen shot of the overlap I’m talking about.

Thank you for your assistance!