body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: rgba(0, 0, 0, 0.05); /* Transparent dark overlay */
    color: #000000; /* Black text */
  }
  
  .container {
    max-width: 850px;
    margin: 30px auto;
    background-color: #ffffff; /* White surface */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    overflow: hidden;
    padding: 20px;
  }
  
  header {
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent black */
    color: #ffffff; /* White text */
    text-align: center;
    padding: 20px;
    border-bottom: 4px solid rgba(0, 0, 0, 0.3); /* Lighter transparent black */
  }
  
  header h1 {
    margin: 0;
    font-size: 2em;
  }
  
  .update-date {
    font-size: 0.9em;
    margin-top: 5px;
  }
  
  nav a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 10px;
  }
  
  nav a:hover {
    text-decoration: underline;
  }
  
  main {
    padding: 20px;
  }
  
  main h2 {
    color: rgba(0, 0, 0, 0.8);
    border-bottom: 2px solid rgba(0, 0, 0, 0.2);
    padding-bottom: 5px;
    margin-top: 20px;
    font-size: 1.2em;
  }
  
  main p, main li {
    margin: 10px 0;
  }
  
  ul {
    list-style: none;
    padding-left: 0;
  }
  
  ul li::before {
    content: "• ";
    color: rgba(0, 0, 0, 0.6);
    margin-right: 6px;
  }
  
  a {
    color: rgba(0, 0, 0, 0.7);
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  footer {
    text-align: center;
    padding: 15px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border-top: 4px solid rgba(0, 0, 0, 0.3);
    font-size: 0.9em;
  }