nk rel="import" href="../bower_components/app-layout/app-header/app-header.html">
<link rel="import" href="../bower_components/app-layout/app-header-layout/app-header-layout.html">
<link rel="import" href="../bower_components/app-layout/app-toolbar/app-toolbar.html">

<link rel="import" href="article-headline.html">
<link rel="import" href="article-detail.html">
<link rel="import" href="two-columns-grid.html">

<dom-module id="blog-app">

  <template>

    <style>

      :host {
        --app-primary-color: