<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <title>QR Code - Error</title>
    <style>
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            display: flex; justify-content: center; align-items: center;
            min-height: 100vh; background: #f5f5f5; color: #333;
        }
        .container {
            text-align: center; padding: 3rem; background: white;
            border-radius: 12px; box-shadow: 0 2px 20px rgba(0,0,0,0.08);
            max-width: 480px; width: 90%;
        }
        .icon { font-size: 3rem; margin-bottom: 1rem; }
        h1 { font-size: 1.5rem; margin-bottom: 0.5rem; color: #dc2626; }
        p { color: #666; margin-bottom: 1.5rem; }
    </style>
</head>
<body>
<div class="container">
    <div class="icon">⚠️</div>
    <h1>QR Code Error</h1>
    <p>This QR code does not exist.</p>
</div>
</body>
</html>
