.form-control.valid {
  border-color: #28a745;
  padding-right: calc(1.5em + .75rem);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: center right calc(.375em + .1875rem);
  background-size: calc(.75em + .375rem) calc(.75em + .375rem);
}

.form-control.error {
  border-color: #dc3545;
  padding-right: calc(1.5em + .75rem);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23dc3545' viewBox='-2 -2 7 7'%3e%3cpath stroke='%23dc3545' d='M0 0l3 3m0-3L0 3'/%3e%3ccircle r='.5'/%3e%3ccircle cx='3' r='.5'/%3e%3ccircle cy='3' r='.5'/%3e%3ccircle cx='3' cy='3' r='.5'/%3e%3c/svg%3E");
  background-repeat: no-repeat;
  background-position: center right calc(.375em + .1875rem);
  background-size: calc(.75em + .375rem) calc(.75em + .375rem);
}