    }
    .pad-left {
      padding-left: 8px;
    }


  </style>

  <core-toolbar class="toolbar">
    <div>Flickr Photos</div>
  </core-toolbar>
  <core-scroll-threshold id="threshold" scrollTarget="{{$.scroller}}" 
    lowerThreshold="500" on-lower-trigger="{{loadMore}}">
  </core-scroll-threshold>
  <div id="scroller" style="overflow:auto;" flex>
    <core-list id="list" data="{{data}}" scrollTarget="{{$.scroller}}">
      <template>
        <div class="item">
          <core-image cla