#game table {
    border-collapse: collapse;
    margin: 0 auto;
    cursor: default;
    user-select: none;
}

#game td {
    border: 1px solid var(--bs-secondary-color);
    text-align: center;
    --cell-size: 10vmin;
    width: clamp(40px, var(--cell-size), 60px);
    height: clamp(40px, var(--cell-size), 60px);
    font-size: 1.4em;
}

#game tr:nth-child(1) td:nth-child(1),
#game tr:nth-child(1) td:nth-child(2),
#game tr:nth-child(1) td:nth-child(6),
#game tr:nth-child(1) td:nth-child(7),
#game tr:nth-child(2) td:nth-child(1),
#game tr:nth-child(2) td:nth-child(2),
#game tr:nth-child(2) td:nth-child(6),
#game tr:nth-child(2) td:nth-child(7),
#game tr:nth-child(6) td:nth-child(1),
#game tr:nth-child(6) td:nth-child(2),
#game tr:nth-child(6) td:nth-child(6),
#game tr:nth-child(6) td:nth-child(7),
#game tr:nth-child(7) td:nth-child(1),
#game tr:nth-child(7) td:nth-child(2),
#game tr:nth-child(7) td:nth-child(6),
#game tr:nth-child(7) td:nth-child(7) {
    border: 0;
}

main #game td div {
    vertical-align: middle;
    position: relative;
    animation-fill-mode: backwards;
}