/* Primo TD funge da toggle */
table.dataTable.dtr-inline.collapsed > tbody > tr > td:first-child,
table.dataTable.dtr-inline.collapsed > tbody > tr > th:first-child {
    position: relative;
    cursor: pointer;
    padding-left: 26px; /* leggermente meno spazio per l'icona */
    vertical-align: top;
}

    /* Icona + di default */
    table.dataTable.dtr-inline.collapsed > tbody > tr > td:first-child:before,
    table.dataTable.dtr-inline.collapsed > tbody > tr > th:first-child:before {
        content: '+';
        display: block;
        position: absolute;
        top: 10px;
        left: 6px;
        width: 16px;
        height: 16px;
        line-height: 16px;
        text-align: center;
        font-weight: bold;
        font-size: 12px;
        color: #fff;
        background-color: #337ab7;
        border-radius: 50%;
        border: 1px solid #2e6da4;
        box-shadow: 0 1px 2px rgba(0,0,0,0.3);
    }

/* Riga aperta → icona – */
table.dataTable.dtr-inline.collapsed > tbody > tr.parent > td:first-child:before,
table.dataTable.dtr-inline.collapsed > tbody > tr.parent > th:first-child:before {
    content: '–';
    background-color: #d9534f;
    border-color: #d43f3a;
}