.thumbnail-wrap{position:relative;width:100%;max-width:800px;aspect-ratio:16/9;margin:auto;overflow:hidden}.thumbnail-wrap iframe{width:100%;height:100%;border:0;display:block}.thumb-overlay{position:absolute;inset:0;display:block;cursor:pointer;background:0 0}.close-btn{position:absolute;top:20px;right:30px;color:#fff;font-size:40px;cursor:pointer}