<div class="container">
  <div class="item">A</div>
  <div class="item">B</div>
  <div class="item">C</div>
</div>
  .container {
    display: flex;
  }
  .item {
    background: lightblue;
    margin: 4px;
    padding: 8px;
  }

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.