.btn {
  -webkit-border-radius: 9;
  -moz-border-radius: 8;
  border-radius: 8px;
  font-family: Arial;
  color: white;
  font-size: 19px;
  background:green;
  padding: 3px 14px 3px 14px;
  text-decoration: none;
}

.btn:hover {
  background: green;
  text-decoration: none;
    color: yellow;

  
}