.video-container{position:relative;width:100%;max-width:900px;margin:0 auto;aspect-ratio:16/9;overflow:hidden;border-radius:10px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.video-container iframe{width:100%;height:100%;border:0}@media (max-width:768px){.video-container{max-width:100%;border-radius:5px}}