gab-social/app/javascript/gabsocial/components/avatar_overlay/avatar_overlay.scss

.avatar-overlay {
  background-size: 48px 48px;

  @include circle(48px);

  &__base {
    @include circle(36px);
  }

  &__overlay {
    @include circle(36px);
    @include abs-position(auto, 0, 0);

    z-index: 1;
  }
}