.container {
  display: table;
  width: 100%;
}
.interior {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}
.btn {
/*  background-color: #fff;*/
/*  padding: 1em 3em;*/
  border-radius: 3px;
  color: #2980b9;
  text-decoration: none;
}
.modal-window {
	position:fixed;
     background-color: rgba(0, 0, 0, 0.5);
	top:0;
	right:0;
	bottom:0;
	left:0;
	z-index:999;
	opacity:0;
	pointer-events:none;
	-webkit-transition:all 0.3s;
	-moz-transition:all 0.3s;
	transition:all 0.3s;
}
.modal-window:target {
	opacity:1;
	pointer-events:auto;
}
.modal-window>div {
	width:450px;
	position:relative;
	margin:10% auto;
  padding:2rem;
	background:#fff;
	color:#444;
}
.modal-window header {
	font-weight:bold;
}
.modal-close {
	color:#262a35;
	line-height:50px;
	font-size:80%;
	position:absolute;
	right:0;
	text-align:center;
	top:0;
	width:70px;
	text-decoration:none;
}
.modal-close:hover {
	color:#FF0000;
}
.modal-window h1 {
  font-size: 150%;
  margin:15px 0 15px;
}