mCaptcha/templates/panel/sitekey/add/add-level.html

<fieldset class="sitekey__level-container" id="level-group-<.= level .>">
  <legend class="sitekey__level-title">
    Level <.= level .>
  </legend>
  <label class="sitekey-form__level-label" for="visitor<.= level .>"
    >Visitor
    <input
      class="sitekey-form__level-input"
      type="number"
	  name="visitor<.= level .>"
      id="visitor<.= level .>"
    />
  </label>

  <label class="sitekey-form__level-label" for="difficulty<.= level .>">
    Difficulty
    <input
      type="number"
	  name="difficulty<.= level .>"
      class="sitekey-form__level-input"
      id="difficulty<.= level .>"
    />
  </label>
  <label class="sitekey-form__level-label--hidden" for="add">
    Add level
    <input
      class="sitekey-form__level-add-level-button"
      type="button"
      name="add"
      id="add"
      value="Add"
    />
  </label>
</fieldset>