@adobe/spectrum-css/dist/components/alert/index-diff.css

The Spectrum CSS top-level backwards compatible package

.spectrum--large .spectrum-Alert {
  min-width: 368px;
  min-height: 38px;
  padding: 20px 20px;

  border-width: 2px;
  border-radius: 4px;
}
.spectrum--large .spectrum-Alert-content {
  margin: 8px 0 0 0;
}