style.css

html{
    font-family: 'Lora', serif;
    background-color: #3BA144;
}
#corpo{
    display: flex;
    position: relative;
    justify-content: center;
    align-items: center;
    flex-flow: column;
}
#valor_dolar{
    color: #ffffff;
    font-size: 22vh;
    margin-top: 10%;
}
.texto{
    color: #ffffff;
    font-size: 6vh;
    margin-top: 12px;
}
@media (max-width: 768px){
    #corpo{
        justify-content: center;
        flex-flow: column;
        margin-top: 30vh;
    }
    #valor_dolar{
        font-size: 12vh;
        text-align: center;
        align-items: center;
    }
    .texto{
        font-size: 4vh;
    }
}
@media (max-width: 330px){
    #valor_dolar{
        font-size: 9vh;
    }
}