.jumbotron {
  background-image: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)),url("img/aku.jpg");
     background-size: cover;
	 height: 300px;
	 
	 }
.rounded-circle {
  
  height:150px;
  width:150px;
} 
.shadow {
  box-shadow:0px 15px 15px black;
   
}