.opt{
  position: relative;	
  text-align: center;
  color: white;
	overflow:hidden;
	z-index:2;
}  

.ctr{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
	padding: 20px;
	border: solid;
	background-color: rgba(0, 0, 0, 0.3);
	min-width: 400px;
}