:root { --sat: env(safe-area-inset-top, 0px); --sab: env(safe-area-inset-bottom, 0px); }
html, body {
  margin: 0; padding: 0; width: 100%; height: 100%;
  background: #0d0d0f; overflow: hidden;
  touch-action: none; overscroll-behavior: none;
  -webkit-user-select: none; user-select: none; -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}
#game {
  display: block; position: fixed; left: 0; top: 0;
  width: 100%; height: 100%;
  touch-action: none; outline: none;
  image-rendering: auto;
}