body {
    margin: 0;
    overflow: hidden; /* 隱藏滾動條，因為星空是全螢幕的 */
    background-color: #000; /* 預設黑色背景 */
    font-family: 'Noto Sans TC', sans-serif;
}

#starfield-scene {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000; /* 星空背景色 */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10; /* 確保在最上層 */
}

#starfield-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.click-hint {
    color: rgba(255, 255, 255, 0.7);
    font-size: 24px;
    text-align: center;
    animation: pulse 2s infinite ease-in-out;
    z-index: 11; /* 在 canvas 之上 */
    cursor: pointer;
    padding: 20px;
    background-color: rgba(0,0,0,0.3);
    border-radius: 10px;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0.7;
    }
}