.grid{
    display: grid;
    grid-template-rows: 300px;
    grid-template-columns: 300px 300px 300px;
    max-width: fit-content;
    margin-left: auto;
    margin-right: auto;
    gap: 5px;
}

.item{
    width: 300px;
    height: 300px;
    object-fit: contain;
    object-position: top;
}

.item-1{
    background-color: red;
}
.item-2{
    background-color: blue;
}
.item-3{
    background-color: green;
}