<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Error</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #fff;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .error-container {
            background-color: #f8f8f8;
            border: 1px solid #e0e0e0;
            border-left: 5px solid #4285f4;
            border-radius: 4px;
            padding: 20px 30px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            max-width: 500px;
            width: 100%;
            text-align: center;
        }
        .error-title {
            color: #4285f4;
            font-size: 24px;
            margin-bottom: 10px;
        }
        .error-message {
            color: #333;
            font-size: 16px;
        }
    </style>
</head>
<body>
    <div class="error-container">
        <div class="error-title">Pendiente</div>
        <div class="error-message">
            <?php echo isset($mensaje) ? $mensaje : 'Ha ocurrido un error inesperado.'; ?>
        </div>
    </div>
</body>
</html>
