.hidden { display: none; }
        /* Stile per la tabella */
        table {
            width: 100%;
            border-collapse: collapse;
        }
        th, td {
            padding: 15px;
            text-align: center;
            border: 1px solid #ccc;
        }
        .popup {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border: 1px solid #ccc;
            background: white;
            padding: 20px;
            z-index: 1000;
            display: none;
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            display: none;
            z-index: 999;
        }