body {
    margin: 10px;
    padding: 10px;
    font-family: sans-serif;
    background-color: #f8f8f8;
}    

img {
 display: block;
 margin-left: auto;
 margin-right: auto;
 width: 50%;
}

.main-container {
    max-width: 1000px;
    width: 90%;
    margin: 15px auto;
    padding: 15px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    line-height: 1.8;
}

.main-container h1,
.main-container h2,
.main-container h3,
.main-container h4,
.main-container h5,
.main-container h6 {
    text-align: center;
}

.navbar {
    margin: auto;
    background-color: #222;
    max-width: 90%;
    padding: 10px 20px;
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  
  .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: auto;
  }
  
  .navbar .brand {
    font-size: 2.5em;
    font-weight: bold;
    color: white;
    text-decoration: none;
  }
  
  .nav-links {
    list-style: none;
    display: flex;
    gap: 15px;
    margin: 0;
    padding: 0;
  }
  
  .nav-links li a {
    color: white;
    text-decoration: none;
    padding: 6px 8px;
  }
  
  .nav-links li a:hover {
    background-color: #444;
    border-radius: 4px;
  }
  

  pre code {
    white-space: pre !important;
    font-family: monospace !important;
  }