html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#1d3b24;
  -webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;
  overscroll-behavior:none;touch-action:none}
canvas#game{position:fixed;left:0;top:0;width:100vw;height:100vh;display:block;touch-action:none}
#safe-probe{position:fixed;visibility:hidden;pointer-events:none;
  padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);
  padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}