/* One viewport-sized scene, independent of document length. Keep video on all pages. */
body.rta-mounted { background-attachment: scroll !important; background-image: none !important; }
#rt-atmosphere { contain: layout paint style; isolation: isolate; transform: translateZ(0); }
#rt-atmosphere video { backface-visibility: hidden; }
#rt-atmosphere.rta-playing .rta-poster { visibility: hidden; }