body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f4;
    padding: 40px 20px;
    color: #333;
    line-height: 1.6;
  }
  
  h1 {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 50px;
    color: #111;
  }
  
  .video-block {
    max-width: 850px;
    margin: 0 auto 60px;
    background: #ffffff;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
  }
  
  h2 {
    margin-top: 0;
    font-size: 1.6rem;
    color: #222;
  }
  
  .video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    border-radius: 10px;
  }
  
  .video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
  }
  
  .note {
    font-style: italic;
    color: #666;
    margin-top: 10px;
    font-size: 0.95rem;
    text-align: center;
  }