.card-smart {
    position: relative;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-direction: column;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: #e8e5e5;
    background-clip: border-box;
    border: 1px solid rgba(0,0,0,.125);
    border-radius: .6rem;
    justify-content: center;
    min-height: 10%;
}

.card-header {
    padding: 0;
    margin-bottom: 0;
    background-color: transparent;
    border-bottom: none;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-pergunta:focus {
    box-shadow: none;
}

.btn-pergunta {
    font-weight: bold;
    font-size: 13px;
}

.card-body {
    font-size: 12px;
    text-align: center;
    background-color: white;
    padding: 1rem;
    font-weight: 600;
}

@media (min-width: 240px) {

    #accordion {
        margin: 0;
    }
}

@media (min-width: 300px) {

    .titulo-retangulo {
        font-size: 0.9rem;
    }
}

@media (min-width: 410px) {

    .titulo-retangulo {
        font-size: 1rem;
    }

    .btn-pergunta {
        font-size: 16px;
    }

    .card-body {
        font-size: 15px;
    }
}

@media (min-width: 576px) {

    .titulo-retangulo {
        font-size: 1.6rem;
    }
}

@media (min-width: 768px) {

    .titulo-retangulo {
        font-size: 2rem;
    }

    .btn-pergunta {
        font-size: 18px;
        padding: 30px;
    }

    .card-body {
        font-size: 17px;
    }

    .card-header {
        height: 100px
    }
}

@media (min-width: 992px) {

    .btn-pergunta {
        font-size: 20px;
    }

    .card-body {
        font-size: 19px;
    }
}

@media (min-width: 1200px) {

    .titulo-retangulo {
        font-size: 2.5rem;
    }

}

@media (min-width: 1400px) {

    .titulo-retangulo {
        font-size: 2.5rem;
    }

    .card-header {
        min-height: 80px;
    }
}