You can try with this code:
@media (max-width: 767px){
.collection-list__item.grid__item {
max-width: calc(32% - var(–grid-mobile-horizontal-spacing) / 2) !important;
}}
You can try with this code:
@media (max-width: 767px){
.collection-list__item.grid__item {
max-width: calc(32% - var(–grid-mobile-horizontal-spacing) / 2) !important;
}}