.btn {
  background: #04FF00;
  background-image: -webkit-linear-gradient(top, #04FF00, #014C00);
  background-image: -moz-linear-gradient(top, #04FF00, #014C00);
  background-image: -ms-linear-gradient(top, #04FF00, #014C00);
  background-image: -o-linear-gradient(top, #04FF00, #014C00);
  background-image: linear-gradient(to bottom, #04FF00, #014C00);
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  text-shadow: 0px 1px 3px #fafafa;
  -webkit-box-shadow: 0px 1px 3px #666666;
  -moz-box-shadow: 0px 1px 3px #666666;
  box-shadow: 0px 1px 3px #666666;
  font-family: Arial;
  color: #ffffff;
  font-size: 50px;
  padding: 10px 20px 10px 20px;
  border: solid #ffffff 2px;
  text-decoration: none;
}

.btn:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}