body {
  overflow: hidden;
  background-color: #000;
}

.container {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  grid-auto-flow: column;
  justify-content: center;
  align-content: center;
  justify-items: center;
  align-items: center;
}

.rsd {
  justify-self: center;
  align-self: center;
  width: 10%;
  height: 10%;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  background-image: url("rejectionsensitivedysphoria.png");
}

html,
body,
.container {
  height: 100%;
  margin: 0;
}