/* Presentation controls overlay the slide, never reserve its height. */
body.presenting #main{height:100dvh}
body.presenting #presentation-controls{transition:opacity .18s ease,visibility .18s ease;box-shadow:0 -4px 16px #0003}
body.presenting.immersive-idle #presentation-controls{opacity:0;visibility:hidden;pointer-events:none}
body.presenting.immersive-idle .native-stage{cursor:none}
@media(prefers-reduced-motion:reduce){body.presenting #presentation-controls{transition:none}}