.bottle-arrow {
  transition: opacity 1s cubic-bezier(0.4,0,0.2,1);
  opacity: 1;
}
.bottle-arrow.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Circle nav: hidden in overview, visible only in fullscreen/selected mode */
.nav-circles {
  transition: opacity 0.5s cubic-bezier(0.4,0,0.2,1);
  opacity: 0;
  pointer-events: none;
}
.nav-circles.is-visible {
  opacity: 1;
  pointer-events: auto;
}
.nav-circles.fade-out {
  opacity: 0;
  pointer-events: none;
}