:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#21364b;background:#f5f7fa;line-height:1.7}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:900px;margin:auto;padding:24px}header{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;border-bottom:1px solid #dce3ec}header a{font-weight:750;text-decoration:none}header span,.meta{color:#637386;font-size:.9rem}main{background:#fff;margin:28px auto;border-radius:16px;padding:40px}h1{font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.2;color:#183a60}h2{font-size:1.2rem;margin-top:30px;line-height:1.4}.intro{font-size:1.15rem}a{color:#185995;overflow-wrap:anywhere}a:focus-visible{outline:3px solid #e0a321;outline-offset:4px}.button{display:inline-block;background:#183a60;color:white;padding:12px 20px;border-radius:8px;text-decoration:none}li{margin:9px 0}section{border-top:1px solid #dce3ec;margin-top:35px;padding-top:12px}nav{display:flex;gap:20px;flex-wrap:wrap}footer{font-size:.9rem;color:#637386}@media(max-width:600px){main{margin:12px;padding:22px}header,footer{padding:20px}}