designer

designer.html

<link rel="import" href="../core-icon-button/core-icon-button.html">
<link rel="import" href="../core-toolbar/core-toolbar.html">
<link rel="import" href="../core-header-panel/core-header-panel.html">
<link rel="import" href="../paper-button/paper-button.html">

<polymer-element name="my-element">

  <template>
    <style>    
      :host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
        top: 0px;
        left: 0px;
      }
      #core_header_panel {
        width: 330px;
        height: 480px;
        left: 510px;
        top: 150px;
        position: absolute;
      }
      #core_toolbar {
        color: rgb(255, 255, 255);
        background-color: rgb(79, 125, 201);
      }
      #section {
        height: 100%;
        position: absolute;
        top: 0px;
        left: 0px;
        width: 100%;
        background: linear-gradient(rgb(214, 227, 231), lightblue);
      }
      #section1 {
        left: 10px;
        top: 10px;
        opacity: 0.9;
        position: relative;
      }
      #paper_button {
        left: 133px;
        top: 36px;
        position: absolute;
      }
    </style>
    <core-header-panel mode="standard" id="core_header_panel">
      <core-toolbar id="core_toolbar">
        <div id="div">Randomizer</div>
      </core-toolbar>
      <section id="section">
        <section id="section1">Random choose a number from {0} to {1}.</section>
        <paper-button raised id="paper_button" center>button</paper-button>
      </section>
    </core-header-panel>
  </template>

  <script>

    Polymer({
      
    });

  </script>

</polymer-element>