Adjust amount of white space under social media/search bar

Hi! Please let me know how to do the following: I want to decrease the amount of white space beneath the social media icons and the search bar and above the dashed line.

 

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.top-search .searchform{
margin-bottom:10px;
}

Adjust its value as per your requirements.