body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333;
  }
  

  header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: white;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
  }
  
  header.shrink {
    height: 12px; /* Adjust the height as needed */
    line-height: 15px; /* Center the text vertically */
  }
  
  header h1 {
    margin: 0;
    padding: 20px;
    transition: all 0.3s ease;
  }
  
  header.shrink h1 {
    font-size: 1.5em; /* Adjust the font size as needed */
    padding: 0 20px; /* Adjust the padding to center the text */
  }
  
  main {
    padding-top: 100px; /* Adjust this value according to the header height */
  }  header {
    background-color: #282c34;
    padding: 20px;
    color: white;
    text-align: center;
    z-index: 1;
  }
  
  .videos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
    margin-top: 106px;
  }
  
  .video {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    cursor: pointer;
  }
  
  .video img {
    width: 100%;
    display: block;
  }
  
  .video-content {
    padding: 15px;
  }
  
  .video-title {
    font-size: 18px;
    font-weight: bold;
    margin: 0;
  }
  
  /* Modal Styles */
  .modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
  }
  
  .modal-content {
    position: relative;
    margin: auto;
    padding: 0;
    width: 80%;
    max-width: 800px;
  }
  
  .modal-content iframe {
    width: 100%;
    height: 450px;
  }
  
  .close {
    position: absolute;
    color: #ffffff;
    font-size: 100px;
    font-weight: 1000;
    cursor: pointer;
  }
  .close {
    right: 15px;
    top: 38;
  }
  

  .fullscreen{
    position: absolute;
    color: #000000;
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
  }
  

  .fullscreen {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0 14px 0;
    right: 15px;
    margin: 0 -10px 0 0;
    bottom: 15px;
    width: 30%;
    height: 10%;
  }
  
  .close:hover, .close:focus {
    color: #f5efef;
    text-decoration: none;
    cursor: pointer;
  }
  .fullscreen:hover, .fullscreen:focus{
    color: #000000;
    text-decoration: none;
    cursor: pointer;
  }