HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS backdrop-filter Blur Example</title>
  <style>
    body {
      margin: 0;
      min-height: 100vh;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, #2563eb, #7c3aed, #db2777);
      font-family: sans-serif;
    }
    .overlay {
      width: min(90%, 420px);
      padding: 1.5rem;
      border-radius: 1rem;
      background: rgba(255, 255, 255, 0.35);
      backdrop-filter: blur(8px);
      text-align: center;
      color: #0f172a;
    }
  </style>
</head>
<body>
  <div class="overlay">
    <h1>Blurred Background</h1>
    <p>The colorful backdrop behind this panel is blurred.</p>
  </div>
</body>
</html>

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CSS backdrop-filter Property - Blur Overlay