accounts-frontend/packages/app/components/ui/button-groups.scss

.horizontalGroup {
  display: flex;
}

.item {
  // TODO: in some cases we do not need overflow hidden
  // probably, it is better to create a separate class for children, that will
  // enable overflow hidden and ellipsis
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;

  $borderConfig: 1px solid rgba(#fff, 0.15);

  border-left: $borderConfig;

  &:last-child {
    border-right: $borderConfig;
  }
}