HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS backdrop-filter Combined Example</title>
  <style>
    body {
      margin: 0;
      min-height: 100vh;
      display: grid;
      place-items: center;
      background:
        linear-gradient(135deg, #1d4ed8 0%, #9333ea 50%, #db2777 100%);
      font-family: sans-serif;
    }
    .modal {
      width: min(90%, 400px);
      padding: 1.5rem;
      border-radius: 1rem;
      background: rgba(15, 23, 42, 0.35);
      backdrop-filter: blur(10px) brightness(110%) contrast(120%);
      color: #fff;
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.18);
    }
  </style>
</head>
<body>
  <div class="modal">
    <h1>Modal Overlay</h1>
    <p>Multiple backdrop filters work together for a richer effect.</p>
  </div>
</body>
</html>

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CSS backdrop-filter Property - Combined Filters