mCaptcha/templates/panel/add-site-key/add-level.html

<div class="sitekey-form__add-level-flex-container">
  <label class="sitekey-form__label" for="level2">Level <.= level .></label>
</div>

<div class="sitekey-form__add-level-flex-container">
  <input
    class="sitekey-form__input--add-level"
    type="number"
    id="level<.= level .>"
    name="level<.= level .>"
	<. if level == 1 { .>
	<.= "required" .>
	<. } .>
    value=""
  />
  <button class="sitekey-form__add-level-button">Add Level</button>
</div>