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

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

/* código omitido */

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

/* código omitido */

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

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

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

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

.cartao__conteudo__resposta {
    transform: rotateY(180deg);

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

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

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

.button:hover {
    background-color: pink;
}

div {
    transform: rotate(45deg);
}

button {
    transition: background-color 0.3s ease
}