You have set Theme Options -> Social Media Links -> Enable Subscribe/Social links in header to Disable
It will trigger a bug in Evolve Plus and breaks the HTML structure. Perhaps this is why you have a small stretch of empty white space at the bottom.
Please see screenshot of your webpage source code http://share.pho.to/9fZ2B/2v/original, you can see a red color
</body> closing tag at the end of the image, the red color indicates broken HTML structure. It will not be in red if nothing is broken.
Please see this thread for more details. https://theme4press.com/support/topic/menu-hover-effect-not-working-in-my-1-9-0-evolve/page/2/#post-19881
And the following custom css you posted is wrong.
padding-top: -0px !important;
It should be 0px not -0px.