.box {
    background-color: rgb(107, 107, 218);
    width: 1fr;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid black;
}

#grid-container{
    display: grid;
    grid-auto-rows: 100px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 10px;
}