:root{color-scheme:light}body{margin:0;background:#f6f8fb;color:#172033;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}main{max-width:920px;margin:0 auto;padding:48px 22px 72px}header{background:#111827;color:#fff;padding:24px 22px}header div{max-width:920px;margin:0 auto}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.1;margin:0 0 12px}h2{margin-top:34px}p,li{font-size:1rem}a{color:#2563eb}nav{margin-top:18px}nav a{color:#bfdbfe;margin-right:18px;text-decoration:none;font-weight:600}.card{background:#fff;border:1px solid #dbe3ee;border-radius:18px;padding:28px;box-shadow:0 8px 30px rgba(15,23,42,.06)}.muted{color:#5b667a}.meta{font-size:.92rem;color:#64748b}footer{margin-top:30px;font-size:.9rem;color:#64748b}