Phoenix Reisen Styleguide
Example
Markup
<div class="form-box">
  <label class="textfield">
    <input type="text" />
    <span class="textfield__label">Input</span>
  </label>
  <label class="textfield">
    <textarea></textarea>
    <span class="textfield__label">Textarea</span>
  </label>
  <button>Senden</button>
</div>
Source: src/components/_forms.scss, line 524