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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS font-weight Numeric Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      line-height: 1.6;
    }

    p {
      font-size: 1rem;
      margin: 0.75rem 0;
      color: #334155;
    }

    .weight-300 { font-weight: 300; }
    .weight-400 { font-weight: 400; }
    .weight-600 { font-weight: 600; }
    .weight-700 { font-weight: 700; }
  </style>
</head>
<body>
  <h1>Numeric Weight Scale</h1>
  <p class="weight-300">300: Font weight demonstration</p>
  <p class="weight-400">400: Font weight demonstration</p>
  <p class="weight-600">600: Font weight demonstration</p>
  <p class="weight-700">700: Font weight demonstration</p>
</body>
</html>

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CSS font-weight Property - Numeric Weight Scale