body{margin:0;background:#f5f5ef;color:#173b31;font:18px/1.8 system-ui,sans-serif}main{max-width:820px;margin:60px auto;padding:0 24px}h1{font-size:clamp(32px,6vw,52px);line-height:1.2}h2{font-size:24px;margin-top:40px}a{color:#17684e}header,footer{border-bottom:1px solid #ccd8d1;padding:20px 0}footer{margin-top:40px;font-size:15px}