body {
  background: #f4f6f9;
}

#rollNo:focus {
  border-color: #0f6e3d;
  box-shadow: 0 0 0 0.25rem rgba(15, 110, 61, 0.15);
}

.btn-success {
  background-color: #0f6e3d;
  border-color: #0f6e3d;
}

.btn-success:hover,
.btn-success:focus {
  background-color: #0b5730;
  border-color: #0b5730;
}