.user-badge {
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85em;
}

/* Evidenzia codice */
.message pre {
    background: #2d2d2d;
    border-left: 4px solid #0066CC;
}