.750px {
    width: 750px;
}

.grid-container {
    display: grid;
    gap: 4px;
    grid-template-columns: repeat(3, auto);
}

@media only screen and (max-width:960px) {
    .grid-container {
        grid-template-columns: repeat(1, auto);
    }
}

.grid-item-left {
    padding: 4px;
    width: 750px;
}

.grid-item-right {
    padding: 4px;
    width: 300px;
}

@media only screen and (max-width:960px) {
    .grid-item-left {
        width: 100%;
    }

    .grid-item-right {
        display: none;
    }
}

.grid-item {
    padding: 4px;
}