.calculadora {
    width: 300px;
    height: 400px;
    border: 1px solid black;
    margin: 0 auto;
    border-radius: 10px;
}

.container-pantalla {
    background-color: white;
    border-radius: 5px;
    width: 90%;
    margin: 10px auto;
    height: 50px;
    border: 1px solid black;
}

.pantalla {
    font-weight: 500;
    border: none;
    padding: 5px;
    width: 95%;
    margin: 0 5px;
    font-size: 20px;
    outline: none;
}
.contenedor-tabla{
    overflow-x: scroll;
}
.botones {
    border-radius: 5px;
    width: 90%;
    height: 78%;
    border: 1px solid black;
    margin: 10px auto;
}
.boton{
    width: 70px;
    height: 50px;
    margin: 5px;
}