body {
    margin: 0;
    overflow: hidden;
    background: #000;
}

#gameCanvas {
    display: block;
    background: #333;
    width: 100vw;
    height: 100vh;
}

#musicButton {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 10px;
    background: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

#musicButton:hover {
    background: #ccc;
}