html,body{
    background:rgb(41, 25, 44);
    font-family: 'Roboto', sans-serif;
    font-size:16px;
}

h1, p{
    margin:0;
    padding:0;
    text-align:center;
}

#main-container{
    align-items:center;
    display:flex;
    flex-direction:column;
    height:100vh;
    justify-content:center;
}

#cards{
    height:400px;
    width:500px;
}

.card{
    align-items:center;
    background:#ded895;
    border:2px solid black;
    border-radius:10px;
    display:none;
    height:100%;
    flex-direction:column;
    justify-content:center;
    padding:15px 20px;
}

.card div{
    font-size:2em;
    text-align:center;
}

.card.show{
    display:flex;
}

.card h1{
    font-family: 'Salsa', cursive;
    font-size:2em;
}

.card .question{
    display:none;
}

.card .answer{
    display:none;
}

.card .question.show{
    display:block;
}

.card .answer.show{
    display:block;
}


#btns{
    display:flex;
    margin-top:50px;
}

#btns .btn{
    background:#3a3ab1;
    border-radius:5px;
    color:white;
    cursor:pointer;
    display:none;
    padding:10px 15px;
}

#btns .btn.show{
    display:flex;
    justify-content:center;
}

@media screen and (max-width:600px){
    #cards {
        height: 400px;
        width: calc(100% - 60px);
    }
}