body{margin:0;background:#f5f7fa;color:#182230;font:16px/1.7 system-ui,sans-serif}main{max-width:680px;margin:40px auto;padding:32px;background:white;border-radius:20px}a{color:#2563eb}h1{line-height:1.2;letter-spacing:-1px}h2{font-size:20px;margin-top:30px}footer{margin-top:40px;color:#667085;font-size:13px}@media(max-width:720px){main{margin:0;border-radius:0;padding:24px}}