fixes
Look on line 140 of the main.css file for .sf-menu li:hover ul, .sf-menu li.sfHover ul and change the top property to get rid of that space.
As far as the H1 sizing, yep you'll have to modify the typography.css file
Look on line 140 of the main.css file for .sf-menu li:hover ul, .sf-menu li.sfHover ul and change the top property to get rid of that space.
As far as the H1 sizing, yep you'll have to modify the typography.css file