:root{font-family:system-ui,sans-serif;color:#173248;background:#eef3f6}body{margin:0;padding:24px 14px}main{max-width:520px;margin:auto;padding:24px;border-radius:16px;background:white}h1{font-size:23px}li{margin:16px 0}p{line-height:1.8}button{padding:14px;background:#176c4a;color:white;border:0;border-radius:8px;font-size:16px}