/* One opacity owner for all sections; no layout or optical-effect overrides. */
html.lpfg-section-fades #presentation-main > section {
  opacity: 0;
}
html.lpfg-section-fades #presentation-main > section[data-section-fade="visible"] {
  opacity: 1;
}
html.lpfg-section-fades #presentation-main > section[data-section-fade="playing"] {
  animation: lpfg-section-fade-in 860ms ease both;
}
@keyframes lpfg-section-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html.lpfg-section-fades #presentation-main > section {
    opacity: 1;
    animation: none;
  }
}
@media print {
  html.lpfg-section-fades #presentation-main > section {
    opacity: 1;
    animation: none;
  }
}