body { font-family: sans-serif; padding: 20px; }
input[type='text'] { padding: 5px; font-size: 16px; }
table { border-collapse: collapse; width: 100%; margin-top: 15px; }
th, td { border: 1px solid #ccc; padding: 8px; text-align: left; }
#messaggio { color: red; margin-top: 10px; }
button { padding: 6px 12px; }