body {
	background:url(../images/bg.jpg) top center;
	padding:0;
	background-size:cover;
}


div img  {
	width: 100%;
}

.outer {
  display: table;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}

.middle {
  display: table-cell;
  vertical-align: middle;
}

.inner {
  margin-left: auto;
  margin-right: auto;
 max-width: 700px;
  background:#fff;
  padding:5%;
  /*whatever width you want*/
}