HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS update slow Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
    }

    .card {
      padding: 1rem;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 0.5rem;
      transition: background 0.3s ease;
    }

    .card:hover {
      background: #dbeafe;
    }

    @media (update: slow) {
      .card {
        transition: none;
        background: #fef3c7;
        border-color: #fcd34d;
      }

      .card:hover {
        background: #fef3c7;
      }
    }
  </style>
</head>
<body>
  <h1>Slow Update Demo</h1>
  <div class="card">
    <p>No hover transition on slow-updating screens.</p>
  </div>
</body>
</html>

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CSS update - No Transitions on Slow