body{color:#17202a;background:#f6f8fa;margin:0;font-family:system-ui,sans-serif}main{max-width:640px;margin:48px auto;padding:24px}form{gap:8px;margin:24px 0;display:flex}input{flex:1;padding:10px 12px}button{padding:10px 16px}li{margin:8px 0}