 .pages {
        display: block;
        margin: 10px 0px;
        text-align: center;
      }

      :host .pages paper-button {
        padding: 5px 8px;
        margin: 0px;
        min-width: 0px;
      }

      :host .pages paper-spinner {
        vertical-align: middle;
        margin-right: 5px;
        width: 20px;
        height: 20px;
      }
    </style>
    <div class="pages">
      <paper-spinner active="[[loading]]"></paper-spinner>
      <paper-button id="previousButton" raised disabled="[[!