body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      line-height: 1.6;
      background: #f9f9f9;
      color: #333;
    }
    header {
      background: #111827;
      color: #fff;
      padding: 20px;
      text-align: center;
    }
    header h1 {
      margin: 0;
    }
    main {
      max-width: 900px;
      margin: 40px auto;
      padding: 20px;
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    }
    h2 {
      margin-top: 30px;
      color: #111827;
    }
    p {
      margin-bottom: 15px;
    }
    footer {
      text-align: center;
      padding: 20px;
      background: #f3f4f6;
      margin-top: 40px;
      font-size: 14px;
      color: #555;
    }
    a {
      color: #2563eb;
      text-decoration: none;
    }
    a:hover {
      text-decoration: underline;
    }
    
    @media (max-width: 768px) {
      body {
        font-size: 16px;
      }
      
      header {
        padding: 15px;
      }
      
      header h1 {
        font-size: 1.5rem;
      }
      
      main {
        margin: 20px auto;
        padding: 15px;
      }
      
      h2 {
        font-size: 1.25rem;
        margin-top: 20px;
      }
      
      p, li {
        font-size: 0.95rem;
      }
      
      footer {
        padding: 15px;
        font-size: 13px;
      }
    }

    @media (max-width: 480px) {
      header h1 {
        font-size: 1.25rem;
      }
      
      main {
        padding: 12px;
      }
      
      h2 {
        font-size: 1.1rem;
      }
    }