body{
    color: #212529;
    margin: 0;
    font-weight: 400;
    background-color: #fff;
    line-height: 1.5;
    text-align: left;
}

/* col */
.col {flex-basis: 0; flex-grow: 1; max-width: 100%;}
.d-none {display: none !important;}

/* flex */
.d-flex {display: flex !important;}
.flex-row {flex-direction: row !important};
.flex-row {flex-direction: column !important;}

@media (min-width: 768px){
    .d-md-none {display: none !important;}
.d-md-block {display: block !important;}
}