<div class="container">
  <div>Sin<br />ajuste</div>
  <button>⏰</button>
</div>

<div class="container">
  <div>Con<br />ajuste</div>
  <button class="fit">⏰</button>
</div>
.fit {
  height: fit-content;
}











/* No influye */
.container {
  display: inline-flex;
  color: white;
}

.container div {
  background: #666;
  padding: 10px;
}

button {
  background: #999;
  border: none;
  padding: 5px;
  border-top-right-radius: 4px;
  border-bottom-right-radius: 4px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.