Reduce gap between top navigation bar/site header and content below, version 7.1

Site URL: https://www.fourseasonscustomflorals.com/

I am creating my site and just added a photo under the navigation bar, and it is creating a very large space between the two. This is happening in the mobile version as well. I want that space reduced and would love the CSS to do so. The 7.1 version of the squarespace templates has made edits very difficult, especially with spacing. If someone could also tell me how to bring the cart and social media buttons closer in (they are basically off the page) and only in the desktop version, that would be great as well. 

Reduce space between image 2 - navigation?

With icons, add to Home > Design > Custom CSS

@media screen and (min-width:992px) {
.header-actions.header-actions--left {
    justify-content: flex-end;
}
.header-actions.header-actions--right {
    justify-content: flex-start;
}
}

It worked for the icons, but the other CSS didn't work for the header!