html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #131419;
  overflow: hidden;
  overscroll-behavior: none;
}

#stage {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#hint {
  position: fixed;
  inset: 0;
  margin: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 2rem 22vh;
  text-align: center;
  color: rgba(164, 172, 196, 0.42);
  font: 300 16px/1.7 system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  letter-spacing: 0.09em;
  pointer-events: none;
  opacity: 0;
  transition: opacity 2.4s ease;
}

body.ready #hint {
  opacity: 1;
}

body.touched #hint {
  opacity: 0;
}