Reduce Padding of images in Footer

Site URL: https://thebasemesh.com/

How do I reduce the padding of the images in the footer? 

I couldn't add my own icons into the social links so I've done it through Images with URL links instead. Only problem is now I can't find out how to reduce the padding. 

Any help would be greatly appreciated! 

Password: GreyHouse157

Add to Design > Custom CSS

div#page-section-62573d2a80a39e1778e2cc00 .span-12>.row {
    max-width: 70%;
    margin: 0 auto;
}

Do you need to place 4 icons same line on mobile?