#grid {
    display: grid;
    grid-template-columns: repeat(10, 35px);
    gap: 2px;
}

.cell {
    width: 35px;
    height: 35px;
    background: gray;
    border: 1px solid black;
    text-align: center;
    line-height: 35px;
    cursor: pointer;
    font-weight: bold;
}

.revealed {
    background: lightgray;
}

.mine {
    background: red;
}