body {
    margin: 0;
    padding: 0;
    background-color: #000;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
    pointer-events: none; /* マウスイベントを無効化 */
}

#container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    margin: 0 auto;
    pointer-events: none; /* マウスイベントを無効化 */
}