:root{font-family:Arial,sans-serif;color:#173a35;background:#f7f8f5;line-height:1.65}body{margin:0}header,main,footer{max-width:820px;margin:auto;padding:24px 20px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #dfe9e3}header a,footer a{color:#247c69;text-decoration:none}main{padding-top:48px;padding-bottom:64px}h1{font-size:clamp(34px,6vw,52px);line-height:1.1;margin:0 0 16px}h2{margin-top:36px}p,li{color:#49675f}aside{background:#edf5f0;border:1px solid #d5e5dc;border-radius:12px;padding:18px;margin:24px 0}footer{border-top:1px solid #dfe9e3;font-size:13px;display:flex;gap:18px;flex-wrap:wrap}@media(max-width:600px){header{align-items:flex-start;gap:16px;flex-direction:column}main{padding-top:32px}}