Help decreasing space between main nav and drop down nav

Site URL: https://sturgeon-panda-ke2f.squarespace.com

I am wanting to decrease the space that is between my main nav and the drop down sub nav. I have been unable to figure this out. decreasing the padding doesn't do it. 

this is a temp site I am using to make edits before I make changes to our live site. 

password to view the site is Beck123

Add to Design > Custom CSS

body:not(.homepage) .nav.subnav {
    top: 50px !important;
}