body {
  background-image: url(background.png);
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  background-color:#ecbe40;
}
/* Para Tables */
@media only screen and (max-width: 767px) {
	body {
		background-image: url(background-tablet.png);
	}
}
/* Para Móviles */
@media only screen and (max-width: 460px) {
	body {
		background-image: url(background-movil.png);
	}
}