.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: url(../images/loader.gif) center no-repeat #fff;
}

#audio-buttons {
position: fixed;
z-index: 99;
right: 20px;
bottom: 20px;
width: 50px;
height: 50px;
display: table;
background: rgba(0, 0, 0, 0.5);
color: #fff;
text-align: center;
text-decoration: none;
outline: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
vertical-align: middle;
}

#pause {
display: none;
}

#play {
display: table-cell;
}

.icon-play, .icon-pause {
    height: 50px;
    vertical-align: middle;
}

.back-button {
    display: inline-block;
    top: 30px;
    color: #000;
    position: fixed;
    right: 30px;
    z-index: 10060;
    margin-top: -14px;
    margin-right: -14px;
    width: 44px;
    font-size: 3rem;
    height: 44px;
    line-height: 44px;
    font-family: Arial,Baskerville,monospace;
    border: 0;
    background: 0 0;
    padding: 0;
    cursor: pointer;
}