body {
    margin: 0;
    font-family: sans-serif;
  }
  
  .video-container {
    position: relative;
    padding-bottom: 46.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
  }
  
  .video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }