:root {
      --text: #1a1a1a;
      --text-muted: #555;
      --bg: #ffffff;
      --link: #0066cc;
      --link-hover: #004499;
      --border: #e0e0e0;
      --code-bg: #f5f5f5;
      --max-width: 720px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      font-size: 16px;
      line-height: 1.6;
      color: var(--text);
      background: var(--bg);
      margin: 0;
      padding: 0;
    }

    main {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 2rem 1.5rem 4rem;
    }

    h1 {
      font-size: 2rem;
      line-height: 1.2;
      margin: 0 0 1.5rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid var(--border);
    }

    h2 {
      font-size: 1.4rem;
      line-height: 1.3;
      margin: 2.5rem 0 1rem;
      padding-top: 0.5rem;
    }

    h3 {
      font-size: 1.15rem;
      line-height: 1.3;
      margin: 2rem 0 0.75rem;
    }

    p {
      margin: 0 0 1rem;
    }

    ul, ol {
      margin: 0 0 1rem;
      padding-left: 1.5rem;
    }

    li {
      margin-bottom: 0.4rem;
    }

    a {
      color: var(--link);
      text-decoration: underline;
    }

    a:hover {
      color: var(--link-hover);
    }

    strong {
      font-weight: 600;
    }

    blockquote {
      border-left: 3px solid var(--border);
      padding-left: 1rem;
      margin: 1rem 0;
      color: var(--text-muted);
    }

    code {
      font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
      font-size: 0.9em;
      background: var(--code-bg);
      padding: 0.15em 0.35em;
      border-radius: 3px;
    }

    pre code {
      display: block;
      padding: 1rem;
      overflow-x: auto;
      border-radius: 6px;
      line-height: 1.5;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5rem 0;
      font-size: 0.95rem;
    }

    th, td {
      border: 1px solid var(--border);
      padding: 0.6rem 0.8rem;
      text-align: left;
    }

    th {
      background: var(--code-bg);
      font-weight: 600;
    }

    hr {
      border: 0;
      border-top: 1px solid var(--border);
      margin: 2.5rem 0;
    }

    footer {
      margin-top: 4rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--border);
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .home-link {
      display: inline-block;
      margin-bottom: 2rem;
      font-size: 0.95rem;
    }