body {
    background: url('img/bg-desktop.webp');
    font-family: "Oswald", sans-serif;
    color: rgb(235, 110, 110);
}

footer {
    background-color: rgb(46, 38, 134);
    color: rgb(0, 0, 0);
    position: fixed;
    bottom: 0;
    width: 100%;
    font-size: 5vw;
}

footer p {
    text-align: center;
    font: 0.6rem;
    margin-top: 0.5rem;
}

#container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 4rem;
    gap: 3rem;
}

.cartao {
    margin: 1rem 1rem;
    background-color: aqua;
    height: 20rem;
    flex-grow: 1;
    flex-basis: calc(33% - 6rem);
}

.cartao_conteudo {
    text-align: center;
    background-color: var(--card-front-color);
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 300ms ease-in-out;
}

.cartao_conteudo h3 {
    color: var(--card-front-color);
    border: 1px solid var(--text-color);
    text-align: left;
    padding: 0.5rem;
    position: absolute;
    margin: 0.6rem;
    border-radius: 0.6rem;
    font-size: 2vw;
    backface-visibility: hidden;
    background-color: aliceblue;
}

:root {
    --text-color: #000000;
    --card-front-color: #7f00b9;
    --card-back-color: #00F4BF;
}

.cartao_conteudo_pergunta p {
    color: var(--text-color);
    font-weight: 700;

}

.cartao_conteudo_resposta p {
    color: var(--card-back-color);
    font-weight: 500;

}

.cartao:hover .cartao_conteudo {
    transform: rotateY (180deg);
}

.cartao_conteudo_pergunta,
.cartao_conteudo_resposta {
    backface-visibility: hidden;
    position: absolute;
    height: 100%;
    width: 100%;
}

.cartao_conteudo_resposta {
    transform: rotateY (180deg);
}

.cartao_conteudo p {
    margin: 1rem;
    padding: 2rem;
    margin-top: 4rem;
}