BuddyPress.org

Site:
http://www.instride.org

Problem:
I have made the header the height I want but my navigation bar is not moving with it.

Question:
How do I move my navigation bar up?

So far:
I have made a child theme. In that theme I have a style.css which has one bit of code for the header, and a header.php that has had no changes so far.

Code:
style.css
#header {
position: relative;
height: 70px;
padding-top: 25px;
}

Thank you for reading and hopefully helping!