body {
  background: #D47E1C;
	background: -webkit-linear-gradient(#D47E1C, #E3B948);
	background: -o-linear-gradient(#D47E1C, #E3B948);
	background: -moz-linear-gradient(#D47E1C, #E3B948);
	background: linear-gradient(#D47E1C, #E3B948);
	height:100%;
	background-repeat: no-repeat;
	//margin: 0;
	background-attachment:fixed;
}

#back-to-top{
  position: fixed;
  right: 10px;
  bottom: 10px;
  width: 50px;
  height: 50px;
  z-index: 17;
  background-color: #555;
  opacity: 0.4;
  display: none;
  align-items: center;
  justify-content: center;
}
#back-to-top i{
  color: white;
  font-size: 2.0em;
}
#back-to-top:hover {
  opacity: 1.0;
  text-decoration: none;
}

.db-models img{
  width: 400px;
  height: 400px;
}