html,body { 
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}
body {
  display: grid;
  place-items: center;
  background-color: #111;
}
.dot{
  width: 0.1rem;
  height: 0.1rem;
  background-color: white;
  border-radius: 50%;
}