HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS overflow-block vs overflow-inline</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
    }

    .panel {
      padding: 1rem;
      border: 1px solid #e2e8f0;
      border-radius: 0.4rem;
      margin-bottom: 0.75rem;
    }

    @media (overflow-block: scroll) {
      .block-axis {
        background: #dbeafe;
        border-color: #93c5fd;
      }
    }

    @media (overflow-inline: scroll) {
      .inline-axis {
        background: #dcfce7;
        border-color: #86efac;
      }
    }
  </style>
</head>
<body>
  <h1>Block vs Inline Axis</h1>

  <div class="panel block-axis">
    <strong>Block axis</strong>
    <p>Blue when overflow-block is scroll.</p>
  </div>

  <div class="panel inline-axis">
    <strong>Inline axis</strong>
    <p>Green when overflow-inline is scroll.</p>
  </div>
</body>
</html>

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