body {
  background-color: #bdc3dd;
  font-family: 'Ubuntu';
  /*background-image: url("../img/fondo.png");
  background-repeat: no-repeat;
  background-size: 100%;*/
  color: #4f4f4f;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}
#portada {
  width: 100%;
  height: 100vh;
  text-align: center;
  background-position: center center;
  background-repeat: no-repeat;
  background-size:cover;
}
.portada_es {
	background-image:url('../img/presentacion.jpg');	
}
@media screen and (max-width: 1050px) {
	#portada {
		background-color:#225292;
		background-size:contain;
	}
	.portada_es {
		background-image:url('../img/portada.jpg');	
	}
}