*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body{
    font-family: 'Righteous', sans-serif;
    display:flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
    background-color: #c7cdd3;
}

.banner{
    margin-top: 25px;
    
}
.banner>img{
    max-width: 300px;
}

.card{
    width: 120px;
    height: 120px;
    position: relative;

    -webkit-transform-style: preserve-3d;
    -webkit-transition: transform .5s;
   transform-style: preserve-3d;
    transition: transform .5s;
}

.card_back, .card_front{
    width: 100%;
    height: 100%;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 20px;
    box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.45);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.icon{
    /* width:80px;
    height: 80px;
    max-width: 80px;
    max-height: 80px; */
   
    
}

.flip{
    -webkit-transform: rotateY(180deg);
    transform: rotateY(180deg);
}


.card_front{
    -webkit-transform: rotateY(180deg);
    transform: rotateY(180deg);
    background-color: #101c2c;

}

.card_back{
    color: #101c2c;
    background-color: #05c3ff;
    font-size: 30px;
    /* display: none; */

}


#gameOver{
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    top:0;
}

#restart{
    padding: 20px;
    font-size: 20px;
    background-color: yellow;
    border: flex;
    border-radius:10px;
    margin-top:10px;
}

#gameBoard{
    max-width: 700px;
    display: grid;
    grid-template: 1fr 1fr 1fr 1fr 1fr / 1fr 1fr 1fr 1fr;
    gap:20px
}

@media only screen and (max-width: 700px) {
    .game-board{
        max-width: 400px;

        grid-template: 1fr 1fr 1fr 1fr 1fr  / 1fr 1fr 1fr 1fr;
        gap: 20px;
      
    }
    .card{
        width: 80px;
        height: 80px;}
    .icon
{
    width: 40px;
}
.card_front,.card_back{
border-radius:10px;

}
}