.hidden {
  display: none;
}

form > .row {
  margin-bottom: 20px;
}

form > .row:last-child {
  margin-bottom: 0;
}

form input.invalid {
  border-color: #dc3545;
}

form .invalid-feedback {
  color: #dc3545;
  font-size: 14px;
  line-height: 21px;
  margin-top: 4px;
  text-align: left;
}