Logo not showing on mobile

Hello, I am working on a site for a client and am having a little issue with the logo. First of all, I want to customize the logo so it appears at it’s current size but stays within the header area and does not overlap the slider. I was able to get it to appear in the header area before but only at a smaller size.

Also, I am not seeing the logo show up on mobile devices. The address is http://www.focusourfuture.org. Can you help me with this? Thanks.