app.component.html

<div class="alert-banner">
  <p><md-icon class="material-icons error" role="img" aria-hidden="true">warning</md-icon> Course Search & Enroll will not be available from June 28 at 4:00pm to July 8 at 8:00am due to the <a href="https://upgrade.sis.wisc.edu/" target="_blank">SIS Upgrade.</a></p>
</div>
<header ngClass.sm="hide-navigation-bar" ngClass.xs="hide-navigation-bar" role="banner">
  <cse-header></cse-header>
  <cse-navigation></cse-navigation>
</header>
<main role="main">
  <router-outlet></router-outlet>
</main>