canvas {
    display: block;
    margin: 50px auto;
    box-shadow: -2px -2px 2px #EFEFEF, 5px 5px 5px #B9B9B9;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px auto;
}

.button-group div {
    width: 120px;
    padding: 10px 10px;
    background-color: #8f7a66;
    font-family: Arial;
    color: white;
    border-radius: 10px;
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-size: 16px;
    text-align: center;
}

.button-group div:hover {
    background-color: #9f8b77;
}

#blackButton {
    background-color: #333333;
}

#blackButton:hover {
    background-color: #444444;
}

#whiteButton {
    background-color: #e8e8e8;
    color: #333333;
}

#whiteButton:hover {
    background-color: #d8d8d8;
}