.book-audio-tray {
    background-color: transparent;
    position: sticky;
    bottom: 50px;
    width: 100%;
    /* align-items:center; */
    z-index:2;
    display: none;
}

.audio-tray-inner{
    position: relative;
    width: max-content;
    margin:0 auto 0 20px;
}

.audio-close{
    background: #fff;
    border-radius: 20px;
    right:-20px;
    top:0;
}

.book-audio-tray #audio-player {
    margin:auto;
}

.book-audio-tray #audio-player:focus {
    outline: none;
}

#audio-player{
    box-shadow: 0 1px 10px -5px #2a2a2a;
    border-radius: 50px;
}

@media (min-width: 769px){
    .audio-tray-inner{
        margin:auto;
    }
}