table.dataTable thead th[data-is-resizable=true] {
    border-left: 2px solid transparent !important;
    border-right: 1px dashed #2b23f9 !important;
}

table.dataTable thead th.dt-colresizable-hover {
    cursor: col-resize !important;
    background-color: #d3ddff !important;
    border-left: 2px solid #2b23f9 !important;
}

table.dataTable thead th.dt-colresizable-bound-min,
table.dataTable thead th.dt-colresizable-bound-max {
    opacity: 0.2 !important;
    cursor: not-allowed !important;
}