* {
margin: 0;
padding: 0;
border: 0;
}
html, body {
	width: 100%;
	height: 100%;
	background-color: #f8f8f8;
}

#qr{
  width: 15%;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.4);
  transition: 0.5s;
  border-radius: 5px;
  position:fixed;
  left:50%;
  top:50%;
  margin-left:-7.5%;
  margin-top:-7.5%;
}
#qr:hover {
  box-shadow: 0 15px 25px 0 rgba(0,0,0,0.6);
}