@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

body {
    animation: fadeIn 2s ease-in-out;
}

#music-player {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 9999;
}

#music-player button {
    background: none;
    border: none;
    cursor: pointer;
}

body {
    opacity: 0;
    transition: opacity 3s ease-in-out;
}

body.loaded {
    opacity: 1;
}