[data-overlay="2"]:before, 
[data-overlay="5"]:before {
  background-color:transparent;
  background-image: linear-gradient(to bottom, 
	rgba(0,0,0,1), rgba(0,0,0,0));
    opacity: 0.7;
}

[data-overlay="4"]:before {
  background-color:transparent;
  background-image: linear-gradient(to bottom, 
	rgba(0,0,0,1), rgba(0,0,0,0));
    opacity: 0.6;
}