.overlay {
  position: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5);
  z-index: 9999;
  cursor: pointer;
}
input.ng-invalid,
select.ng-invalid{
  border-color: #dc3545;
}
.ng-invalid + .invalid-tooltip {
  display: block;
  max-width: inherit;
}
.ng-invalid.dk-invalid-feedback,
.ng-invalid + .dk-invalid-feedback{
  display: inline;
}
.dk-invalid-feedback {
  display: none;
  width: 100%;
  margin-top: .25rem;
  font-size: 80%;
  color: #dc3545;
}