HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>inset-block-start without position</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      color: #0f172a;
    }

    p {
      margin: 0 0 12px;
      max-width: 40rem;
      line-height: 1.5;
    }

    .box {
      inset-block-start: 20px;
      background: #2563eb;
      color: #fff;
      padding: 8px;
    }
  </style>
</head>
<body>
  <p>This box is <strong>static</strong> (default), so <code>inset-block-start</code> is ignored.</p>
  <div class="box">No position → no offset</div>
</body>
</html>

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CSS inset-block-start Property — needs position