.center {
  box-sizing: content-box;
  margin-inline: auto;
  max-inline-size: var(--container-width);
}

.center.gameboard-shell {
  height: 100%;
  overflow: hidden;
  /* For use with viewport-fit=cover */
  padding-top: var(--safe-area-inset-top);
  padding-bottom: var(--safe-area-inset-bottom);
}