Footer Logo Size - mobile

Site URL: https://antelope-octagon-t69s.squarespace.com

Hi, 

I was wondering what CSS code I would need to make the Logo smaller on Mobile? Seems very large at the moment, 

Password: Fostex1722!

Any help would be much appreciated. 

Many thanks, 
Oliver

Add to Home > Design > Custom CSS

@media screen and (max-width:640px) {
div#block-yui_3_17_2_1_1579206539028_20156+.row>.span-2 {
    width: 50% !important;
    margin-left: auto;
    margin-right: auto;
}
}