body {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    line-height: 1.6;
    color: #1a1a1a;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
  }

  h1, h2, h3 {
    font-weight: 600;
    margin-top: 2em;
  }

  .main-nav {
        background-color: #f4f4f4;
        padding: 10px;
        text-align: center;
        margin-bottom: 20px;
        border-radius: 5px;
      }
  .main-nav a {
        display: inline-block;
        margin: 0 15px;
        text-decoration: none;
        color: #333;
        font-weight: bold;
  }
  .main-nav a:hover {
        color: #0056b3;
        text-decoration: underline;
  }

  img {
    max-width: 100%; 
    height: auto;    
    display: block;  
    margin: 20px 0;  
  }

  ul {
            list-style-type: "- ";
            padding-left: 20px;
        }

        li {
            margin-bottom: 8px;
        }

section h2::before { 
    display: block; 
    content: " "; 
    margin-top: -60px;
    height: 60px;     
    visibility: hidden; 
    pointer-events: none;
}



  p {
    margin-bottom: 1.2em;
  }

  section {
    margin-bottom: 3em;
  }

  .hero-meta {
    color: #666;
    font-style: italic;
  }

  .affiliation {
    color: #666666; 
    font-size: 0.92em;
}

  footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    font-size: 0.8em;
    color: #888;
  }