.body-interno{
    background: whitesmoke;
    background-image: none;
}



.contenedor-menu{
    position: relative;
    padding: 10px 30px 30px 30px;
    z-index: 3;
    margin-top:35px;
    background: whitesmoke;
    border-bottom: 1px solid rgb(181, 181, 181);
}

.titulo-menu{
    max-width: 300px;
}

.titulo-menu img{
    width: 100%;
    max-width: 230px;
}


/*******************************/
.contenedor-libros{
    width: 100%;
    background: whitesmoke;
    padding: 3% 20px 4% 20px;
}

/****************/

@media screen and (max-width:750px){
    .titulo-menu{
        text-align: center;
    }
}