body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f0f0f0;
}

h1 {
    color: #333;
}

button {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

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

.cell {
    width: 100px;
    height: 100px;
    background-color: #ccc;
    border: 2px solid #333;
    position: relative;
}

.ball {
    width: 80px;
    height: 80px;
    background-color: #000;
    border-radius: 50%;
    position: absolute;
    top: 10px;
    left: 10px;
    display: none;
    cursor: pointer;
}