body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 10px;
}

.cell {
    width: 100px;
    height: 100px;
    background-color: lightgray;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
    cursor: pointer;
}

.cell:hover {
    background-color: #ccc;
}

button {
    margin-top: 20px;
}