body{background:#f4f4f4;margin:0;font-family:Arial,sans-serif}#root{min-height:100vh}.container{max-width:500px;margin:0 auto;padding:24px 18px}h1{text-align:center;margin-bottom:30px}.form-group{margin-bottom:18px}label{margin-bottom:7px;font-weight:700;display:block}input,textarea{box-sizing:border-box;background:#fff;border:1px solid #ccc;border-radius:8px;width:100%;padding:12px;font-size:17px}textarea{resize:vertical;min-height:100px}input[readonly]{background:#e9e9e9;font-weight:700}button{cursor:pointer;border:none;border-radius:8px;width:100%;margin-top:10px;padding:15px;font-size:18px;font-weight:700}.messaggio{text-align:center;background:#fff;border-radius:8px;margin-top:20px;padding:14px;font-weight:700}