.persona__imagen{
    height: 270px;
    width: 270px;
}

.persona__imagen--roberta{
    background: url("../../img/personas/roberta.jpg");
}

.persona__imagen--marcela{
    background: url("../../img/personas/marcela.jpg");
}

.persona__imagen--andrea{
    background: url("../../img/personas/andrea.jpg");
}
.persona__imagen{
    background-size: cover;
    height: 270px;
    background-position: center;
    width: 270px;
    background-repeat: no-repeat;
    border-radius: 100%;
}