html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #1b1410;
  color: #f3ead8;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

#stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
}

canvas#game {
  width: min(100vw, calc(100vh * 4 / 3));
  height: min(100vh, calc(100vw * 3 / 4));
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  cursor: default;
  background: #2a2018;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  border-radius: 6px;
  touch-action: none;
}