.dc::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../img/dc_marvel.jpg');
  background-size: cover;
  opacity: 0.075;
  z-index: -1;
}
.batman, .wonder-woman, .superman {
	border: 2px solid black;
	float: left;
	margin: 5px;
	width: 400px;
	height: 400px;
	padding: 5px;
}
.batman p, .wonder-woman p, .superman p {
	padding: 5px;
}
.spiderman, .iron-man, .thor {
	border: 2px solid black;
	float: left;
	margin: 5px;
	width: 400px;
	height: 400px;
	padding: 5px;
}
.spiderman p, .iron-man p, .thor p {
	padding: 5px;
}