*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

.music-control {
    position: fixed;
    right: 1.1rem;
    bottom: 1.1rem;
    z-index: 50;
}

.music-control button {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    color: #fff;
    background: rgba(15, 23, 42, 0.85);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease, background 0.2s ease;
}

.music-control button:hover {
    transform: scale(1.06);
}

.music-control button.playing {
    background: #0284c7;
}

.music-control.light button {
    color: #065f46;
    background: rgba(255, 255, 255, 0.92);
}

.music-control.light button.playing {
    color: #fff;
    background: #059669;
}