header {
    text-align: center;
    padding-bottom: 50px;
}

.player2Score {
    padding-left: 50px;
}
.tieCount {
    padding-top: 20px;
}
body {
    margin-top: 10%;
    justify-content: center;
    align-items: center;
}

.TicTacToe {
    margin-left: 35%;
    margin-right: 35%;
    width: 30%;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;
    justify-content: center;
    text-align: center;
}
.TicTacToe div {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid black;
    font-size: 250%;
}
.TicTacToe div:after {
    content: "";
    display: block;
    padding-bottom: 100%;
}