:root { --bg: #f6f7fb; --surface: #ffffff; --text: #111827; --muted: #4b5563; --accent: #2563eb; --line: #dfe7f3; }
    * { box-sizing: border-box; }
    body { margin: 0; font-family: Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
    a { color: var(--accent); text-decoration: none; }
    a:hover { text-decoration: underline; }
    .container { max-width: 1100px; margin: 0 auto; padding: 1rem 1.25rem 4rem; }
    header { background: #fff; border-bottom: 1px solid var(--line); }
    nav { display: flex; justify-content: space-between; padding: 1rem 0; }
    .brand { font-weight: 700; font-size: 1.35rem; }
    .nav-links { display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0; }
    .hero { background: #eef4ff; padding: 2rem; border-radius: 12px; margin-bottom: 1.5rem; }
    article { background: #fff; padding: 2rem; border-radius: 12px; border: 1px solid var(--line); }
    h1, h2, h3 { line-height: 1.2; margin-top: 1.5rem; }
    p, li { color: var(--text); }
    blockquote { border-left: 4px solid var(--accent); padding-left: 1rem; color: var(--muted); }
    table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
    th, td { border: 1px solid var(--line); padding: 0.75rem; text-align: left; }
    .callout { background: #f4f9ff; border: 1px solid var(--line); padding: 1rem; border-radius: 8px; }
    .meta { color: var(--muted); font-size: 0.95rem; }
    .footer { background: #fff; border-top: 1px solid var(--line); padding: 1rem 0; margin-top: 2rem; }
    .list-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
    .card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 1rem; }
    .tag { display: inline-block; background: var(--accent); color: white; border-radius: 999px; padding: 0.2rem 0.6rem; font-size: 0.75rem; }
    @media (max-width: 768px) { nav { display: block; } .nav-links { flex-wrap: wrap; margin-top: 1rem; } }