HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS scroll-margin-block Example</title>
  <style>
    html {
      scroll-snap-type: y mandatory;
      scroll-behavior: smooth;
    }

    body {
      font-family: system-ui, sans-serif;
      margin: 0;
      padding: 20px;
      background: #f8fafc;
    }

    section {
      height: 100vh;
      scroll-snap-align: start;
      scroll-margin-block: 20px;
      margin: 10px 0;
      border: 2px solid #2563eb;
      border-radius: 12px;
      background: #dbeafe;
      display: grid;
      place-items: center;
      font-size: 1.5rem;
      font-weight: 700;
      color: #1e3a8a;
    }
  </style>
</head>
<body>
  <h1>Sections with Custom Scroll Margin Block</h1>
  <section>Section 1</section>
  <section>Section 2</section>
  <section>Section 3</section>
</body>
</html>

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scroll-margin-block with scroll snapping