body {
    font-family: sans-serif;
    background: whitesmoke;
    text-align: center;
    padding: 20px;
}

h1{
    margin-bottom: 10px;
}

#status {
    margin-bottom: 15px;
    font-size: 18px;
    font-weight: bold;
}

.board {
    display: grid;
    grid-template-columns: repeat(3,100px);
    grid-template-rows: repeat(3,100px);
    gap: 6px;
    justify-content: center;
    margin: 0 auto 15px;
}

.cell {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    font-weight:bold;
    background: white;
    border: 2px solid black;
    cursor: pointer;
}

.cell:disabled {
    background: grey;
    cursor: not-allowed;
}