body{margin:0;background:#f5f6fa;color:#182334;font:18px/1.7 system-ui,sans-serif}main{max-width:860px;margin:auto;padding:32px 24px}nav{display:flex;flex-wrap:wrap;gap:20px}a{color:#155e75}h1{line-height:1.2}article{padding:24px 0;border-bottom:1px solid #ccd4df}aside{padding:20px;background:#fff3dc;border-radius:12px}footer{margin-top:32px}