.admin #previews .preview{width:calc(100% - 20px);aspect-ratio:16/9;border:1px solid #323232;margin:0 10px;position:relative}.admin #previews .preview::before{content:"";display:block;width:100%;height:100%;background:rgba(0,0,0,0);position:absolute;top:0;z-index:2}.admin #previews .preview iframe{width:100%;height:100%;position:absolute;top:0;z-index:1}