body{background:#f5f5f5;font-family:Arial}
.box{width:350px;margin:80px auto;background:#fff;padding:30px;border-radius:10px}
input,button{width:100%;padding:12px;margin:8px 0;box-sizing:border-box}
button{background:#1677ff;color:white;border:0;border-radius:5px}