.bg-img {
  width: 100%;
  height: 100%;
  background: url('../images/backgrounds/3.jpg')  no-repeat center/100% ;
  background-size: cover;
  
  &:before {
    content: '';
		position: absolute;
		top: 0;
		right: 0;
		bottom: 0;
		left: 0;
		background-image: linear-gradient(to bottom right,#333,#fff);
		opacity: .9; 
  }
}