Reduce Space Under Site Header

Hello everyone!

In a bit of a strain on this one. I want to reduce the amount of space between the website’s header image and the content on the page, but I’m having a really hard time finding the right CSS to use.

I’m currently using the Label Premium theme.

I’ve changed the website’s background colour to red for now so you can see the amount of space there is to close off.

ANY help would be greatly appreciated!

P.S. I’ve looked through many other threads about this issue but the attempts I’ve made have not been successful.

The page I need help with: [log in to see the link]