/* LỆNH 12 · pacing: a scene change takes ≤ 0.6 s (pitch-up.css: .5 s in, .56 s out); the demo leaves in 0.4 s */
#s-demo.leaving{transition:opacity .4s var(--io),transform .4s var(--out),visibility 0s .4s!important}
/* the film runs by itself: its controls, seek row and chapter cues step aside while it plays (they come back on pause, or on hover) */
#s-demo.playing :is(.demo-ctl,.demo-seek,.cues){opacity:0!important;transition:opacity .3s}
#s-demo.playing :is(.demo-ctl,.demo-seek):hover{opacity:1!important}