.bb{aspect-ratio:16/10;max-width:100%;position:relative}.bb-poster,.bb-szene{width:100%;height:100%;display:block;position:absolute;inset:0}.bb-poster{object-fit:contain;transition:opacity .4s ease-out}.bb-szene{opacity:0;transition:opacity .4s ease-out}.bb[data-bereit] .bb-szene{opacity:1}.bb[data-bereit] .bb-poster{opacity:0}