    <style>
        /* Reset básico */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* Fondo completo */
        body {
            height: 100vh;
            width: 100%;
            background: url('fondo.jpg') no-repeat center center fixed;
            background-size: cover;
            font-family: Arial, Helvetica, sans-serif;
            color: #ffffff;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }

        /* Logo centrado arriba */
        .logo {
            max-width: 180px;
            margin-bottom: 40px;
        }

        /* Contenedor del mensaje */
        .maintenance-message {
            /* background-color: rgba(0, 0, 0, 0.6); */
            padding: 30px 50px;
            /* border-radius: 10px; */
            /* box-shadow: 0 0 20px rgba(0,0,0,0.5); */
            max-width: 700px;
        }

        h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        p {
            font-size: 1.2rem;
            margin-bottom: 30px;
        }

        /* Botón azul */
        .back-button {
            display: inline-block;
            padding: 12px 30px;
            background-color: #6bbad4;
            color: #ffffff;
            font-size: 1rem;
            font-weight: bold;
            text-decoration: none;
            border-radius: 6px;
            transition: background-color 0.3s ease;
        }

        .back-button:hover {
            background-color: #4b98b1;
        }

        /* Responsive */
        @media(max-width: 600px){
            .maintenance-message {
                padding: 20px 25px;
            }
            .logo {
                max-width: 120px;
                margin-bottom: 25px;
            }
            h1 {
                font-size: 1.8rem;
            }
            p {
                font-size: 1rem;
            }
            .back-button {
                padding: 10px 25px;
                font-size: 0.9rem;
            }
        }
    </style>