body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: sans-serif;
}

canvas {
    background-color: #d2b48c; /* 砂色のような背景 */
    box-shadow: 5px 5px 15px rgba(0,0,0,0.3);
}

.controls {
    display: flex;
    align-items: center;
    margin-top: 15px;
}

.game-info {
    margin-bottom: 10px;
    font-size: 18px;
    font-weight: bold;
}

.stage-select {
    display: flex;
    align-items: center;
    margin-right: 20px;
}

.stage-select label {
    margin-right: 10px;
}

#restartButton {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-right: 20px;
}

.volume-control {
    display: flex;
    align-items: center;
}

.volume-control label {
    margin-right: 10px;
}