body{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.container{
    width: 400px;
}
#progress .times,
.card-footer,
.volume-container{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.volume-container i{
    margin-right: 5px;
}
li.playing{
    background-color: #0B5EB7;
    color: #fff;
}