.calculatrice
{
        width:300px;
        height:300px;
        background-color:#eeeeee;
        border:2px solid #CCCCCC;
}
.calculatrice td
{
        height:16.66%;
}
.calc_td_resultat
{
        text-align:center;
}
.calc_resultat
{
        width:90%;
        text-align:right;
        margin-left: 12px;
        font-weight: bold;
}
.calc_td_calculs
{
        text-align:center;
}
.calc_calculs
{
        width:90%;
        text-align:center;
}
.calc_td_btn
{
        width:25%;
        height:100%;
}
.calc_btn
{
        width:90%;
        height:90%;
        font-size:20px;
}
.align-buttons
{
        text-align: center;
}