*{box-sizing:border-box}body{margin:0;font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;background:#f9fafc;color:#0f172a}main{max-width:720px;margin:0 auto;padding:3rem 1.75rem 4rem;background:#ffffff;min-height:100vh;box-shadow:0 20px 45px rgba(15,23,42,0.08)}header{margin-bottom:2.5rem}h1,h2,h3{font-weight:600;line-height:1.3}h2{margin-top:2.75rem;padding-bottom:0.4rem;border-bottom:1px solid rgba(15,23,42,0.1)}p,li{line-height:1.75;margin-top:1.1rem}ul,ol{padding-left:1.25rem}a{color:#0a84ff;text-decoration:none}a:hover{text-decoration:underline}.updated{margin-top:0.5rem;color:rgba(15,23,42,0.65)}