* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}

#gameContainer {
    text-align: center;
}

#gameBoard {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 10px;
    margin: 20px auto;
}

.cell {
    width: 100px;
    height: 100px;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid #333;
    font-size: 2rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

button {
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 20px;
}

button:hover {
    background-color: #555;
}

#message {
    font-size: 1.2rem;
    margin-top: 20px;
    color: green;
}