/* Blue outline on focus */
.StripeElement {
  border-color: #80BDFF;
  padding: 8px 5px 5px 5px;
}

.StripeElement--focus {
  border-color: #80BDFF;
  outline:0;
  box-shadow: 0 0 0 .2rem rgba(0,123,255,.25);
  transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}