@adobe/spectrum-css/dist/components/fieldgroup/index-vars.css

The Spectrum CSS top-level backwards compatible package

.spectrum-FieldGroup {
  display: -ms-flexbox;
  display: flex;
  vertical-align: top;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}

.spectrum-FieldGroup--vertical {
  display: -ms-inline-flexbox;
  display: inline-flex;
  -ms-flex-direction: column;
      flex-direction: column;
}