.one_by_one_grid{
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    grid-gap: 10px;
    grid-auto-rows: minmax(100px, auto);
    justify-items: center;
}

.two_by_two_grid{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 10px;
    grid-auto-rows: minmax(100px, auto);
    justify-items: center;
}

.three_by_three_grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 10px;
    grid-auto-rows: minmax(100px, auto);
    justify-items: center;
}