nav {
    background-color: #353535;
    display: flex;
    justify-content: space-around;
    padding: 15px 0;
  }
  
  nav a {
    color: #fff;
    text-decoration: none;
    font-size: 18px;
  }
  
  nav a:hover {
    color: #ddd;
  }
.thumbnail-container {
    display: flex;
    align-items: stretch;
  }
  
  .thumbnail {
    margin-right: 20px;
    width: 400px;
    overflow: hidden;
  }
  
  
  .thumbnail-iframe {
    width: 100%;
    height: 100%;
    border: none;
    transform: scale(1);
    transform-origin: 0 0;
  }
  
  .card {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    border: 1px solid #ccc;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
  }
  
  .card header {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
  }
  
  .card body {
    flex-grow: 1;
  }
  
  .card footer {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
  }
  
  .expand-button,
  .download-button {
    font-size: 12px;
    padding: 2px 4px;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
  }
  
  .expand-button:focus,
  .download-button:focus {
    outline: none;
  }