Bulma CSS class .file-cta

<div class="file">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
  </label>
</div>