Form Lightbox, additional info Product

If you click on the form block, then Design, and then Edit Form Styles, from there you can customize all of the form styles. But this may not translate to the lightbox form, so try this out. Obviously change the fonts or remove the font lines entirely if you don't need them, same with text-transforms.

//Lightbox Form//
.sqs-modal-lightbox-content .lightbox-inner .lightbox-content {
  background: #090b09 !important;
  border: 1px solid #e7e64d;
}
.sqs-modal-lightbox-content .lightbox-inner .lightbox-content .lightbox-close {
  color: #e7e64d;
}
.sqs-modal-lightbox-content .lightbox-inner .lightbox-content .form-wrapper .form-title {
  font-family: 'Quantify Bold';
  text-transform: uppercase;
  color: white;
}
.form-wrapper .field-list .title, .form-wrapper .field-list .field .caption {
  font-family: 'Nexa Bold';
  text-transform: uppercase;
  color: white !important;
}
.sqs-modal-lightbox .sqs-modal-lightbox-content .sqs-button-element--primary {
  background-color: #e7e64d;
  color: black;
  font-family: 'Nexa Bold';
}
.form-wrapper .react-form-contents .field-list .fields .description.required, .form-wrapper .react-form-contents .field-list .description.required, .form-wrapper .react-form-contents .field-list p.description, .form-wrapper .react-form-contents .field-list .caption-text:not(:empty) {
  font-family: 'Nexa Bold';
  color: white;
}
.sqs-modal-lightbox-content .lightbox-inner .lightbox-content .form-wrapper {
  background-color: black;
}