body,
html{
  position: absolute;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  background-color: black;
}

.gender-presentation {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  width: 21rem;
  height: 21rem;
}

.gender-presentation div {
  /*position: absolute;*/
  width: 1rem;
  height: 1rem;
  background-color: #FFF;
}