.custom-control.image-checkbox {
  position: relative;
  padding-left: 0;
}

.custom-control.image-checkbox .custom-control-input:checked ~ .custom-control-label:after, .custom-control.image-checkbox .custom-control-input:checked ~ .custom-control-label:before {
  opacity: 0;
}

.custom-control.image-checkbox label {
  cursor: pointer;
}

.custom-control.image-checkbox label:before {
  border-color: #007bff;
  background-color: #007bff;
}

.custom-control.image-checkbox label:after, .custom-control.image-checkbox label:before {
  transition: opacity .3s ease;
  opacity: 0;
  left: .25rem;
}

.custom-control.image-checkbox label:focus, .custom-control.image-checkbox label:hover {
  opacity: .8;
}

.custom-control.image-checkbox label img {
  border-radius: 2.5px;
}

.custom-control.image-checkbox .custom-control-input:checked ~ label img {
  border: 3px solid;
  border-color: #007bff;
  border-radius: 5px;
}

.form-group-image-checkbox.is-invalid label {
  color: #dc3545;
}

.form-group-image-checkbox.is-invalid .invalid-feedback {
  display: block;
}