HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS border-block-start-style Compare</title>
  <style>
    body {
      font-family: sans-serif;
      padding: 1.25rem;
      background: #f8fafc;
    }
    .grid {
      display: grid;
      gap: 0.75rem;
      max-width: 16rem;
    }
    .dashed {
      border-block-start: 2px dashed #2563eb;
      padding-block-start: 0.65rem;
    }
    .dotted {
      border-block-start-style: dotted;
      border-block-start-width: 2px;
      border-block-start-color: #dc2626;
      padding-block-start: 0.65rem;
    }
  </style>
</head>
<body>
  <h1>Style comparison</h1>
  <div class="grid">
    <div class="dashed">dashed block-start</div>
    <div class="dotted">dotted block-start</div>
  </div>
</body>
</html>

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CSS border-block-start-style Property - Dashed vs Dotted