body {
    background: url("../IMAGES/fondo.jpg");
    color: white;
}

header { 
    
    background-color:white;
    color: black;
    opacity: 0.7; 
    text-align: center;
    border-radius: 20px;
    padding: 20px;
    margin:10px; 
}

#contenido h2{
    text-transform: uppercase;
    text-decoration: line-through;    
}

#contenido h3{
    text-transform: uppercase;
    text-decoration: line-through;
    font-size: 150%;
}