.stage-wrap {
  width: min(420px, 100%);
  aspect-ratio: 420 / 760;
  max-height: min(78vh, 760px);
  background: var(--stage);
  border: 1px solid rgba(232, 238, 247, 0.12);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  touch-action: none;
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  cursor: crosshair;
  background: #4f6b3e;
  touch-action: none;
}

#game:focus {
  box-shadow: inset 0 0 0 2px var(--accent);
}