.callback-widget__text-submit:disabled {
  cursor: not-allowed;
  box-shadow: none;
  filter: grayscale(0.2);
  opacity: 0.55;
}

.callback-widget__text-submit:disabled:hover,
.callback-widget__text-submit:disabled:focus,
.callback-widget__text-submit:disabled:active {
  box-shadow: none;
  filter: grayscale(0.2);
  opacity: 0.55;
}