:root {
    --text-color: #9f39aa;
    --card-front-color: #2ca836;
    --card-back-color: #00F4BF;
    }
    
    body{
    background-image: url(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% - 6rem);
    }
    
    .cartao_conteudo h3{
    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_conteudo{
    text-align: center;
    background-color: var(--card-front-color);
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 300ms ease-in-out;
    }
    
    .cartao_conteudo p{
    margin-top: 1rem;
    padding: 2rem;
    margin-top: 4rem;
    }
    
    .cartao_conteudo_pergunta p{
    color: var(--text-color);
    font-weight: 500;
    }
    
    .cartao_conteudo_resposta p{
    color: var(--card-back-color);
    font-weight: 700;
    }
    
    .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-width: 560px){
body {
background: url(img/bg-mobile.webp);
}
.cartao{
flex: 10 calc (100% 1rem)
}
.cartao_conteudo h3{
font-size: 3vw;
}
.cartao_conteudo p{
font-size: 3vw;}
    }