html{
    width: 100vw;
    height: 100vh;
}
body{
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    position: relative;
}
body::before{
    content: "";
    position: absolute;
    z-index: -1;
    width: 100%;
    height: 100%;
    background: url("bacgroung_fortune_teller.jpg") ;
    opacity: 0.8;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
.card{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: 300px;
    border: 1px solid grey;
    border-radius: 15px;
    font-size: 200px;
    color: darkslategrey;
}

#wrapper{
    margin: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    perspective: 1000px;
}
#card{
    position: relative;
    width: 200px;
    height: 300px;

    transform-style: preserve-3d;
    transition: transform .5s;
}
#back-face{
    position: absolute;
    background: url("./back-red_large-1024x1024.png");
    background-position: center;
    background-size: cover;
    backface-visibility: hidden;
}
#front-face{
    transform: rotateY(180deg);
    position: absolute;
    background: #f1e8b8;
}
.table{

    display: flex;
}
.memory-card{
    transform-style: preserve-3d;
    box-shadow: 1px 1px 0 rgba(0, 0, 0, .3);
    transform: scale(1);
    background: #f1e8b8;
    cursor: pointer;
    margin: 0 5px;
}
.memory-card:active{
    transform: scale(0.97);
    transition: transform .2s;
}
.textResult{
    width: 100px;
    height: 40px;
}
#card.flip{
    transform: rotateY(180deg);
}
.hidden{
    opacity: 0;
}
#textResult{
    margin: 5px auto;
    text-align: center;
    font-size: 30px;
    font-style: italic;
    border-radius: 10px;
    color: red;
    background: #f1e8b8;
    width: 200px;
}
#btn{margin-top: 5px;
    font-size: 20px;
    background: #f1e8b8;
    width: 150px;
    height: 35px;
    border-radius: 15px;
    border: 1px solid lightgray;
}