body{margin:0;background:#0a1222;color:#e8eef9;font:16px/1.7 system-ui,Arial,sans-serif}header,main,footer{max-width:960px;margin:auto;padding:24px}header a,footer a{color:#7ac8ff}header{display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid #29344c}h1{font-size:clamp(2rem,4vw,3rem);line-height:1.2}h2{margin-top:2rem}p,li{max-width:77ch}a{color:#84ceff}footer{font-size:.9rem;border-top:1px solid #29344c}nav{display:flex;gap:15px;flex-wrap:wrap}