.bg {
  position: fixed;
  width: 100%;
  height: 400px; /*same height as jumbotron */
  top:0;
  left:0;
  z-index: -1;
}
.jumbotron {
  height: 400px;
  color: white;
  text-shadow: #444 0 1px 1px;
  background:transparent;
}
.moveup{
	bottom: 75px;
	position: relative;
}