How to arrange footer blocks in column form

Site URL: https://malicheofficial.com/

Hello, i am having trouble figuring out how I can arrange my 2 footer blocks into columns on the mobile.

Hi. Add to Design > Custom CSS

/* Footer 2 columns */
@media screen and (max-width:640px) {
div#footerBlocksTop .span-3:nth-child(-n+2) {
    width: 50% !important;
    float: left !important;
}
}