/*  stili per le formule matematiche */

.sios-portlet .formula {
    display: inline-block;
    padding: 0;
    position: relative;
    -ms-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;  
}

.sios-portlet .formula .frazione, 
.sios-portlet .formula .fraz
{
    display: inline-block;
    text-align: center;
    vertical-align: middle;
    margin: 0 0.2em 0.4em;
}

.sios-portlet .formula .numeratore,
.sios-portlet .formula .num
{
    display: block;
    padding-top: 0.15em;
}

.sios-portlet .formula .denominatore,
.sios-portlet .formula .den
{
    display: block;
    padding-top: 0.15em;
    border-top: thin solid black;
}

.sios-portlet .formula .esponente,
.sios-portlet .formula .esp
{
    display: inline-block;
    position: absolute;
    font-size: 75%;
    line-height: 0;
    top: -0.7em;
}