.game-container {
    max-width: 300px;
    margin: 0 auto;
    text-align: center;
}

#board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.cell {
    width: 100%;
    height: 100px;
    font-size: 48px;
    line-height: 100px;
    border: 2px solid #000;
    cursor: pointer;
}

button {
    margin-top: 20px;
}