.hidden {
    display: none;
}
.btn-p{
    width: 100%;
}
.materiadiv {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2em;
    border-bottom: 2px solid rgb(207, 78, 78);
}
.input-calificacion{
    width: 40%;
    border: none;
    outline: none;
    border-bottom: 2px solid rgb(207, 78, 78);
}
.label {
    font-size: 2em;
}
.resultado {
    font-size: 2.5em;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    border-bottom: 2px solid #030;
}