Footer not stacked on mobile

Site URL: https://soybean-flute-42kz.squarespace.com/

Hi, 

I'm hoping somebody could help me with some code that makes the footer not stacked on mobile. There is so little in my footer it easily fits next to each other.

Thanks so much. 

Password to site is Sandy

Thanks

Claudia

Add to Home > Design > Custom CSS

@media screen and (max-width:640px) {
div#footer-blocks .span-12>div:nth-child(2) {
    width: 45% !important;
    float: left !important;
}
}