.container {
  padding:5px 30px 30px 30px;
  margin:30px;
  border:solid white 1px;
  border-radius:5px;
  text-align:center;
}

.button {
  background-color: #ffffff;
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}
.button-red {
  background-color: #F44336; /* Green */
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}
.button-green {
  background-color: #4CAF50; /* Green */
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}
.button-blue {
  background-color: #3F51B5; /* Green */
  border: none;
  border-radius: 5px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}

#surprise {
  visibility: visible;
}

.invisible {
  visibility: hidden;
}