space between #masthead and #nav-primary

Hi,Currently I'm using a big logo size centered and I would like to decrease the space between the logo and the navigation bar. A lot of vertical spacing I noticed is "wasted" also because the logo is inside the other container called #site-branding and #site-logo that doesn't fit the whole #masthead height. Thanks for support ( note: I've removed the search box and also the social icon from masthead )