.navbutton--disabled,
button:disabled,
.btn-submit:disabled {
  pointer-events: none;
  opacity: 0.6;
  filter: grayscale(0.3);
  cursor: not-allowed !important;
  box-shadow: none !important;
  background: #e9ecef !important;
  color: #888 !important;
  border-color: #ccc !important;
  transition: none !important;
}

.navbutton--disabled:hover,
button:disabled:hover,
.btn-submit:disabled:hover {
  background: #e9ecef !important;
  color: #888 !important;
  border-color: #ccc !important;
  box-shadow: none !important;
}