HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS height Hero Example</title>
  <style>
    body { margin: 0; font-family: system-ui, sans-serif; }

    .hero {
      padding: 2rem 1.5rem;
      background: #1e293b;
      color: #fff;
      text-align: center;
    }

    @media (min-height: 32rem) {
      .hero {
        min-height: 100dvh;
        display: flex;
        align-items: center;
        justify-content: center;
      }
    }
  </style>
</head>
<body>
  <section class="hero">
    <div>
      <h1>Welcome</h1>
      <p>Full-screen hero on tall viewports.</p>
    </div>
  </section>
</body>
</html>

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CSS height - Full-Height Hero