:root{color-scheme:light;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#172b42;background:#f4f7fa}*{box-sizing:border-box}body{margin:0}header{background:#092948;color:#fff;padding:1.1rem max(1rem,calc((100vw - 860px)/2))}header strong{font-size:1.45rem}nav{display:flex;gap:1.2rem;flex-wrap:wrap;margin-top:.5rem}a{color:#075c9a}header a{color:#fff}main{max-width:860px;margin:2rem auto;padding:0 1rem}article{background:#fff;border-radius:14px;padding:2rem;box-shadow:0 8px 28px #17304b14}h1{font-size:1.9rem;margin-top:0}h2{font-size:1.2rem;margin-top:2rem}p,li{line-height:1.8}ul,ol{padding-inline-start:1.6rem}.language{border-top:1px solid #dce5ec;margin-top:2.5rem;padding-top:1rem}.action{display:inline-block;background:#e87418;color:#fff;padding:.75rem 1rem;border-radius:8px;text-decoration:none;font-weight:700}footer{max-width:860px;margin:1.5rem auto 2.5rem;padding:0 1rem;color:#536779;font-size:.9rem}