div.board {
    background-color: #bdecec;
    width: fit-content;
    margin: 0 auto;
}

div.board-row {
    display: block;
    margin: 0 auto;
    padding: 0;
    border-bottom-style: solid;
    border-bottom-width: 0.5px;
}

div.board-row:last-child {
    border-bottom-width: 0;
}

div.board-row > div.child-board {
    display: inline-block;
    margin: 0;
    padding: 0;
    border-right-style: solid;
    border-right-width: 0.5px
}

div.board-row > div.child-board:last-child {
    border-right-width: 0;
}

div.child-board-row {
    display: block;
    margin: 0;
    padding: 0;
}

div.cell {
    display: inline-block;
    /* border-style: solid;
    border-width: 0.5px; */
    width: 1.2em;
    height: 1.5em;
    margin: 0;
    padding: 0;
    font-size: 2.5em;
}