body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    color: #333;
  }
  header {
    background: #007bff;
    color: white;
    padding: 15px;
    text-align: center;
  }
  nav {
    background: #0056b3;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 10px;
    flex-wrap: wrap;
  }
  nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 8px 12px;
    border-radius: 4px;
  }
  nav a:hover {
    background: rgba(255,255,255,0.15);
  }
  .container {
    max-width: 1100px;
    margin: auto;
    padding: 20px;
  }
  h2 {
    color: #007bff;
    margin-bottom: 15px;
  }
li{
  line-height: 30px;
}
  /* Two-column layout */
  .section {
    display: flex;
    align-items: center;
    gap: 30px;
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  }
  .section:nth-child(even) {
    flex-direction: row-reverse;
  }
  .text-col {
    flex: 1;
  }
  .text-col pre {
    background: #f1f1f1;
    padding: 10px;
    border-radius: 4px;
    overflow-x: auto;
  }
  .image-col {
    flex: 1;
    text-align: center;
  }
  .image-col img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: transform 0.2s ease;
  }
  .image-col img:hover {
    transform: scale(1.03);
  }
  .note {
    background: #fff3cd;
    padding: 10px;
    border-left: 4px solid #ffecb5;
    margin: 15px 0;
  }

  /* Modal Styles */
  .modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background: rgba(0,0,0,0.8);
    padding: 20px;
    box-sizing: border-box;
  }
  .modal-content {
    position: relative;
    margin: auto;
    max-width: 900px;
    background: black;
    border-radius: 8px;
    width: 100%;
  }
  .modal iframe {
    width: 100%;
    height: 56vw;
    max-height: 500px;
    border: none;
  }
  .modal img {
    width: 100%;
    height: auto;
  }
  .close {
    color: white;
    position: absolute;
    top: -15px;
    right: -15px;
    font-size: 24px;
    cursor: pointer;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
    width: 35px;
    height: 35px;
    text-align: center;
    line-height: 35px;
  }
  footer {
    text-align: center;
    font-size: 13px;
    padding: 20px;
    margin-top: 40px;
    color: #666;
  }
  /* Video Thumbnail with Play Button */
  .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgb(255 255 255 / 29%);
    border-radius: 50%;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
    z-index: 2;
  }
  .play-button:hover {
    background: rgba(255,255,255,1);
  }
  .play-button::before {
    content: "";
    display: block;
    width: 0;
    height: 0;
    border-left: 18px solid #007bff;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    margin-left: 5px;
  }
 


.video-frame {
  position: relative;
  display: inline-block;
  border-radius: 12px;
  border:20px solid #007BFF;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.video-frame img {
  display: block;
  max-width: 100%;
}

.video-frame:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 25px rgba(0,0,0,0.15);
}

#goTopBtn {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 40px;
    right: 30px;
    z-index: 100;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: #333;
    color: #fff;
    cursor: pointer;
    padding: 10px 15px;
    border-radius: 5px;
  }
  #goTopBtn:hover {
    background-color: #555;
  }

  /* Responsive */
  @media (max-width: 768px) {
    .section {
      flex-direction: column !important;
      text-align: center;
    }
  }