a {
  display: block;
  background-color: lightgreen;
  width: 80px;
  text-decoration: none;

}

ul {
    visibility:hidden;
    position:absolute;
    top:40px;
    left:100px;
    
}

#avi:target >li {
    visibility:visible
}

p, ul {
  display: inline-block;
  margin: 0;
  padding: 0;
}