body{font-family:Arial;background:#f4f4f4}
.box{max-width:420px;margin:80px auto;background:#fff;padding:30px;border-radius:12px}
input{width:100%;padding:10px;margin:8px 0}
button{width:100%;padding:12px}
.error{background:#ffdede;padding:10px;margin-bottom:10px}
h1{text-align:center;color:#c86ba6}