<div class="bl_joint">
  <button class="el_btn el_btn__outline" type="button">
    <i aria-hidden="true" class="el_icon fas fa-align-left el_icon__fit hp_mg_r_xxs"></i>
    <span class="el_txt">左揃え</span>
  </button>
  <button class="el_btn el_btn__outline" type="button">
    <i aria-hidden="true" class="el_icon fas fa-align-center el_icon__fit hp_mg_r_xxs"></i>
    <span class="el_txt">中央揃え</span>
  </button>
  <button class="el_btn el_btn__outline" type="button">
    <i aria-hidden="true" class="el_icon fas fa-align-right el_icon__fit hp_mg_r_xxs"></i>
    <span class="el_txt">右揃え</span>
  </button>
</div>