.img-gradient{
  position:relative;
  display:inline-block;
}

.img-gradient:after {
  content:'';
  position:absolute;
  left:0; 
  bottom: 20px;
  width:100%; height:20vw;
  background-image: linear-gradient(to top, #ffffff, #ffffff, rgba(255,255,255,0.5), rgba(255,255,255,0.3), rgba(255,255,255,0), rgba(255,255,255,0), rgba(255,255,255,0));
  
}
.img-gradient img{
	display:block;
	
}