SendGrid style-guide fullscreen modal

modal-fullscreen.html

<div class="modal-fullscreen">
  <header class="flex-header">
    <div>
      <a class="flex-header-action modal-close">
        <i class="sg-icon sg-icon-x"></i>
      </a>
      <div class="flex-header-title">
        <h3>Fullscreen Modal</h3>
      </div>
    </div>
  </header>
  <div class="modal-content has-padding">
    <div class="row modal-header">
      <div class="col-8">
        <h2>Title Goes Here.</h2>
      </div>
      <div class="col-4 modal-header-details">
        <p class="small">You haven't tested this email yet.</p>
      </div>
    </div>
    <div class="row">
      ...
    </div>
  </div>
</div>