.nupp {
  background-color: #3498db;
  color: #ffffff;
  padding: 10px;
  border: 2px solid #dce9f1;
  border-radius: 5px;
  cursor: pointer;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.nupp:hover {
  background-color: #2980b9;
  border-color: #b1c7d4;
}

body {
  background-color: #3e5e74;
}