<div class="parent">
  Texte centré
</div>

<div class="parent">
  <div class="align">Texte centré aussi</div>
</div>

.parent {
  border: 1px solid red;
  text-align: center;
  margin-bottom: 10px;
}

.align {
  display: inline-flex;
  border: 1px solid blue;
}