body{margin:0;background:#f4f7f8;color:#20313c;font-family:Arial,sans-serif;line-height:1.65}main{max-width:850px;margin:35px auto;padding:30px;background:#fff;border-radius:12px}h1{font-size:28px;line-height:1.25}h2{font-size:21px;margin-top:28px}a{color:#087b83;text-decoration:underline}@media(max-width:600px){main{margin:12px;padding:20px}h1{font-size:24px}}