@media screen and (min-width: 576px) {}

@media screen and (min-width: 768px) {
    main {
        grid-template-columns: 1fr 1fr;
    }
}

@media screen and (min-width: 992px) {
    main {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

@media screen and (min-width: 1200px) {
    main {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}