img{
  width: 220px;
  height: 200px;
  border-radius: 10%;
  opacity: 0.4;
  transition: 2s;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.1);

}

img:hover{
    opacity: 1;
   
}

body {
  margin: 0;
  padding: 0;
}

h2, p {
  margin: 10px;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: black;
}

ul li {
  float: left;
}

ul li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-family: Tahoma;
}

ul li a:hover {
  background-color: grey;
}