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

.container{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.game-container{
    width: 800px;
    padding: 20px;
    border-radius: 10px;
    row-gap: 15px;
    box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
    background-image: linear-gradient(90deg, #fffbd5, #ccc);
}

.cards-container{
    display: grid;
    grid-template-rows: 125px 125px 125px;
    grid-template-columns: 200px 200px 200px 200px;
    grid-gap: 20px 10px;
    place-items: center;
}

.heading-container{
    text-align: center;
}

.gfg-heading{
    color: #0E9D57;
}

.card{
    justify-items: center;
    display: flex;
    align-items: center;
    position: relative;
    cursor: pointer;
}

.outline-image{
    position: absolute;
    border-radius: 10px;
    top: 0;
    left: 0;
    height: 125px;
    width: 125px;
    border-radius: 50%;
}

.card-image{
    height: 125px;
    width: 125px;
    transform: rotateY(90deg); 
    transition: all ease-in 0.25s;
    mix-blend-mode: multiply;
}

.progress-container{
    text-align: center;
    display: flex;
    justify-content: space-around;
    width: 100%;
    margin: 50px 0 20px 0;
}

.move-counter{
    padding: 10px 20px;
    border-radius: 25px;
    border: 1px solid #ccc;
}

.restart-button{
    padding: 10px 20px;
    background-color: #0E9D57;
    border: none;
    border-radius: 25px;
    color: #fff;
    cursor: pointer;
}

.restart-button:hover{
    background-color: transparent;
    border: 1px solid #0E9D57;
    color: #0E9D57;
}

/* Dynamic classes that are being added by JavaScript */
.toggled .card-image { 
    transform: rotateY(0deg); 
    transition-delay: 0.25s; 
} 

.item .outline-image { 
    transition: all ease-in 0.25s; 
    transition-delay: 0.25s; 
} 
  
.toggled .outline-image { 
    transform: rotateY(90deg); 
    transition-delay: 0s; 
}

@media screen and (max-width: 767px) {
    .game-container{
        width: 100%;
    }
    
    .cards-container{
        grid-template-rows: 125px 125px 125px 125px;
        grid-template-columns: 33% 33% 33%;
        grid-gap: 10px 10px;
    }

    .outline-image{
        height: 100px;
        width: 100px;
    }
    
    .card-image{
        height: 100px;
        width: 100px;
    }

    .progress-container{
        margin: 10px 0 10px 0;
    }
    
}