<div class="overlay-container feedback">
  <header class="overlay-header">
    <h2 class="overlay-header-title">Please let us know your thoughts:</h2>
  </header>
  <main class="overlay-content minimal">
    <form>
      <br>
      {{textarea class="remarks" name='remarks' value=remarks}}
    </form>
  </main>
  <footer class="overlay-footer">
    <div class="overlay-footer-content">
      <a class="cancel" {{action "closeOverlay"}}>cancel</a>
    </div>
    <button class="button-primary button--green" {{action "submit"}}>Send Feedback</button>
  </footer>
</div>

<div class="overlay-container feedback">
  <header class="overlay-header">
    <h1 class="overlay-header-title">Please let us know your thoughts:</h1>
  </header>
  <main class="overlay-content minimal">
    <form>
      <br>
      {{textarea class="remarks" name='remarks' value=remarks}}
    </form>
  </main>
  <footer class="overlay-footer">
    <div class="overlay-footer-content">
      <a class="cancel" {{action "closeOverlay"}}>cancel</a>
    </div>
    <button class="button-primary button--green" {{action "submit"}}>Send Feedback</button>
  </footer>
</div>

Convert feedback header to H1
Convert feedback header to H1
