body {
      margin: 0;
      padding: 0;
      background-color: #808080;  /* grey background for page */
      color: #fff;                /* white text for contrast */
      font-family: Arial, sans-serif;
      line-height: 1.6;
    }
    .container2 {
      max-width: 1000px;
      margin: 0 auto;
      padding: 40px 20px;
      box-sizing: border-box;
    }
    h2 {
      text-align: center;
      margin-bottom: 30px;
    }
    .video-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      justify-content: center;
      margin-bottom: 40px;
    }
    .video-grid .video {
      flex: 1 1 300px;
      max-width: 480px;
      background: #666; /* darker gray for contrast, optional */
      border-radius: 4px;
      overflow: hidden;
    }
    .video-grid .video iframe {
      width: 100%;
      height: 270px;
      border: none;
      display: block;
    }
    .btn‑success {
      display: inline-block;
      padding: 12px 24px;
      background-color: #1e90ff;
      color: #fff;
      text-decoration: none;
      border-radius: 4px;
      text-align: center;
      transition: background-color 0.3s ease, transform 0.2s ease;
    }
    .btn‑success:hover {
      background-color: #0e75d1;
      transform: scale(1.05);
    }