:root{
    --text-color: #DBE4EF;
    --card-front-color: #144480;
    --card-back-color: #00F4BF;
}

body{
    background-image: url(img/bg-desktop.webp);
    font-family: Bai Jamjuree;
}

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

.cartao{
    margin: 1rem 1rem;
    height: 20rem;
    flex-grow: 1;
    flex-basis: calc(33% - 0.6rem);
}

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

.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_pergunta p{
    color: var(--text-color);
    font-weight: 500;
}

.cartao_conteudo_resposta p{
    color: var(--card-back-color);
    font-weight: 700;
}

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


.cartao.active .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);
}

footer{
    background-color: black;
    color: white;
    position: fixed;
    bottom: 0;
    width: 100%;
    height: 2rem;
}

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


@media (max-widht: 560px){
     body{
         background: url(img/bg-mobile.webp);
     }

    .cartao{
        flex: 1 0 calc(100% - 1rem)
    }

    .cartao_conteudo h3{
         font-size: 3vw;
    }

    .cartao_conteudo p{
        font-size: 3vw;
    }
}