.btn-success:not(.btn-light) {
  background-color: rgb(29, 29, 29);
  border: none;
  padding: 7% 44%;
  transition: 0.5s;
}

.btn-success:not(.btn-light):hover {
  background-color: rgb(153, 0, 0);
  border: none;
  padding: 7% 44%;
}