.tecla{
    background: whitesmoke;
    color:black;
    text-align: center;
    width: 60px;
    height: 60px;
    border: 5px black solid;
    font-size: 40px;
}

.tabla{
    width: 500px;
    height: auto;
    background-color: darkgray;
}

.operacion{
    background: whitesmoke;
    color:black;
    text-align: center;
    width: 60px;
    height: 60px;
    border: 5px black solid;
    font-size: 40px;
}


.igual{
    background: #729C99;
    color:black;
    text-align: center;
    width: 60px;
    height: 60px;
    border: 5px black solid;
    font-size: 40px;
}

.vacio{
    width: 60px;
    height: 60px;
}

.pantalla{
    text-align: right;
    width: 490px;
    border: 5px black solid;
    font-size: 50px;
    margin: 0px;
}

.tituloInstrucciones{
    font-weight: bold;
}

.instrucciones{
    margin: 0px;
}