<span class="flex">
  Some text <em>emphasized text</em>
</span>
.flex {
  border: 5px solid #ccc;
  display: flex;
}

body {
  padding: 1em;
  font: 1.2em/1.4 Arial, Helvetica, sans-serif;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.