:root {
  font-family: sans-serif;
  font-size: 1.2rem;
}

#container {
  max-width: 12rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 2rem;
  perspective: 1000px;
}

chess-piece + chess-piece {
  --hello-size: 6rem;
}

chess-piece + chess-piece + chess-piece {
  --hello-size: 5rem;
}

chess-piece:last-of-type {
  --hello-size: 4rem;
}