.header {
	position:fixed;
	width:100%;
	height:100px;
	text-align:center;
}
.container {
	position:fixed;
	width:100%;
	top:100px;
	text-align:center;
}
.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: center;
}