body {
    margin: 0;
    overflow: hidden;
    background: #1a1a2e;
}

#info {
    position: absolute;
    top: 20px;
    left: 20px;
    color: rgb(255, 221, 221);
    background: rgba(153, 230, 255, 0.7);
    padding: 10px 20px;
    border-radius: 30px;
    font-family: Arial, sans-serif;
    pointer-events: none;
    z-index: 100;
    backdrop-filter: blur(4px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

#instruction {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.9);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    padding: 8px 20px;
    border-radius: 40px;
    font-size: 14px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 100;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

#music-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(30, 30, 50, 0.9);
    backdrop-filter: blur(4px);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 12px 28px;
    border-radius: 40px;
    font-size: 16px;
    font-weight: bold;
    letter-spacing: 1px;
    cursor: pointer;
    z-index: 200;
    transition: background 0.3s, transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

#music-btn:hover {
    background: rgba(60, 60, 90, 1);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.6);
}

#music-btn.playing {
    background: rgba(200, 30, 60, 0.95);
    border-color: rgba(255, 150, 150, 0.6);
}

#progress-bar {
    position: absolute;
    bottom: 80px;
    left: 20%;
    width: 60%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
    z-index: 150;
    display: none;
}

#progress-fill {
    height: 100%;
    width: 0%;
    background: #ffaa66;
    transition: width 0.2s;
}