: flex-start;
      }

      .self-end {
        -ms-align-self: flex-end;
        -webkit-align-self: flex-end;
        align-self: flex-end;
      }
    </style>

    <div id="wrapper" class="layout-horizontal">

      <div id="left"
           class="self-start"
           on-tap="playPause">

        <!-- Icon -->
        <paper-icon-button id="play"
                           icon="paper-audio-icons:play-arrow"
                           class="fit"
                           hidden$="{{ _hidePlayIcon(