h1{
    text-align: center;
}

/* Menú de navegación */
header{
    background-color: black;
}

#menu{
    background-color: black;
    height: 60px;
}
header nav img{
    margin-right: 75%;
    height: 40px;
}

main section a{ 
    text-decoration: none;
    color: orange;
}
main section a::after{ 
    text-decoration: none;
    color: green;
}

/**Escritorio**/
@media (min-width: 991px) {
    main section img{
        width: 90%;
    }
}
/**Celular**/
@media (max-width: 767px) {
    main section img{
        width: 100%;
    }
}
/**Tablet**/
@media (min-width: 768px) and (max-width: 990px) {
    main section img{
        width: 100%;
    }
}