body {
    font-size: 14px;
}

.MuiButton-root,
.MuiTableCell-root,
.MuiTypography-root ,
.MuiAlert-message,
.MuiInputLabel-root,
.MuiInputBase-root,
.MuiMenuItem-root   {
    font-size: 14px !important;
}

.MuiTableHead-root {
    background-color: rgba(220,220,220);
}

.MuiTableCell-head {
    color: rgba(0, 0, 0, 0.54);
}