body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
  }
  
  header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
  }
  
  header h1 {
    margin: 0;
  }
  
  nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  nav ul li {
    display: inline;
  }
  
  nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
  }
  
  article {
    padding: 2rem;
  }
  
  article h2 {
    margin-bottom: 1rem;
  }
  
  section.architecture {
    margin-bottom: 2rem;
  }
  
  section.architecture img {
    max-width: 100%;
    height: auto;
    display: block;
    margin-bottom: 1rem;
  }
  
  img {

    max-height: 500px;
    max-width: 500px;

}