:root {
  --btn: 1;
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
  --sal: env(safe-area-inset-left, 0px);
  --sar: env(safe-area-inset-right, 0px);

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--color-black);
  color: var(--color-text);
  overflow: hidden;
  overscroll-behavior: none;
  text-size-adjust: 100%;
}

/* every word in the game is set in the pixel font, like the sprites and the HUD's own letters */
body {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  line-height: var(--leading-normal);
  touch-action: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: var(--color-clear);
}

/* iPhone Safari ignores user-scalable=no and does not pass these down from body reliably */
#app,
#app * {
  user-select: none;
  -webkit-touch-callout: none;
}

#stage,
#stage *,
.touch,
.touch * {
  touch-action: none;
}

button {
  font: inherit;
  color: inherit;
  -webkit-tap-highlight-color: var(--color-clear);
}

#app {
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse at 50% 40%,
    var(--color-surface-page-glow) 0,
    var(--color-surface-page-edge) 70%
  );
}

#stage {
  position: absolute;
  left: 0;
  top: 0;
  width: 768px;
  height: 432px;
  box-shadow: var(--shadow-stage);
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: var(--color-night);
  outline: none;
}