.square{
    width: 100px;
    height: 100px;
    outline: 1px solid gray;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}
#gameboard{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    width: 300px;
    outline: 2px solid gray;
    padding: 0;;
}