* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background-color: #f5f5f5;
            font-family: Arial, sans-serif;
        }

        .container {
            text-align: center;
            padding: 20px;
        }

        .container img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 0 auto;
        }

        .mensaje {
            margin-top: 30px;
            color: #333;
        }

        .mensaje h1 {
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .mensaje p {
            font-size: 1.1rem;
            color: #666;
        }

        .btn-volver {
            display: inline-block;
            margin-top: 20px;
            padding: 12px 30px;
            background-color: #007bff;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            transition: background-color 0.3s;
        }

        .btn-volver:hover {
            background-color: #0056b3;
        }