HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS monochrome Cards Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      margin: 0;
    }

    .card {
      padding: 1rem;
      max-width: 16rem;
      background: linear-gradient(135deg, #dbeafe, #fce7f3);
      border-radius: 0.5rem;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }

    @media (monochrome) {
      .card {
        background: #fff;
        border: 2px solid #000;
        box-shadow: none;
        font-weight: 500;
      }
    }
  </style>
</head>
<body>
  <h1>Card Demo</h1>
  <div class="card">
    Flat bordered card for grayscale e-readers and panels.
  </div>
</body>
</html>

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CSS monochrome - Simplify Cards