body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      line-height: 1.6;
      max-width: 800px;
      margin: 0 auto;
      padding: 2rem;
      color: #333;
    }
    h1, h2, h3, h4, h5, h6 {
      color: #2c3e50;
      margin-top: 1.5em;
    }
    a {
      color: #3498db;
      text-decoration: none;
    }
    pre, code {
      background-color: #f8f8f8;
      border-radius: 3px;
      font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
    }
    pre {
      padding: 1em;
      overflow-x: auto;
    }
    img {
      max-width: 100%;
    }