.dt-checkbox-cell {
    position: relative;
}

    .dt-checkbox-cell input {
        margin: -3px 0 -3px 5px;
    }


.dt-checkbox {
    width: 17px;
    height: 17px;
}

    .dt-checkbox:after {
        border-radius: 0;
        background: transparent;
        border-left: 0;
        border-top: 0;
        width: 5px;
        height: 10px;
        transform: rotate(45deg);
        top: 1px;
        left: 5px;
    }



.dt-selected {
    background-color: #6495ed1f !important;
}

.dt-selectAll {
    margin-left: 3px;
}