#titulo {
    margin-top: 12px;
    color: azure;
    font-family: Arial, Helvetica, sans-serif;
    font-style: italic;
}

.circulo {
    text-align: center;
    background-color: rgb(43, 37, 37);
    border-radius: 50%;
    width: 100px;
    height: 100px;
}

#display-4 {
    font-weight: bolder;
    color: rgb(19, 182, 27);
}