/* Bootstrap XS size */
@media only screen and (max-width: 575px) {
    body {
        font-size: 13px !important;
    }
}

/* Bootstrap SM size */ 
@media only screen and (min-width : 576px) {
    body {
        font-size: 13px !important;
    }
}

/* Bootstrap MD size */
@media only screen and (min-width: 768px) {
    body {
        font-size: 14px !important;
    }
}

/* Bootstrap LG size */
@media only screen and (min-width : 992px) {
    body {
        font-size: 15px !important;
    }
}

/* Bootstrap XL size */
@media only screen and (min-width: 1200px) {
    body {
        font-size: 16px !important;
    }
}