Modal

  <div class="c-modal">
    <div class="c-modal__content">
      <div class="c-modal__header">...</div>
      <div class="c-modal__body">
        ...
      </div>
      <div class="c-modal__footer">
        <a class="c-button" href="...">...</a>
      </div>
    </div>
  </div>