.icon {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  line-height: 16px;
}

.sun {
  height: 16px;
  width: 16px;
  border-radius: 100%;
  background: var(--gray900);
  z-index: 1;
}

.moon {
  height: 16px;
  width: 16px;
  border-radius: 100%;
  background: var(--gray900);
}

.moon:before {
  content: '';
  position: absolute;
  height: 13px;
  width: 13px;
  left: -2px;
  top: 0;
  bottom: 0;
  margin: auto;
  border-radius: 100%;
  background: var(--gray50);
}

.light .moon {
  display: none;
}

.dark .sun {
  display: none;
}