.fi-sidebar {
    max-width: 230px;
    transition: width 0.2s ease;
    position: relative;
    border-right: 1px solid rgba(0, 0, 0, 0.1); /* Colore della linea */
}

.sidebar-resizer {
    position: absolute;
    top: 0;
    right: 0;
    width: 5px;
    height: 100%;
    cursor: ew-resize;
    z-index: 999;
}