body{
    margin: 100px;
    margin-top: 100px;
    margin-bottom: 100px;
    background-color: thistle;
    align-items: center;
    display: flexbox;
   
}

header{
    color: black;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    align-items: center;
    margin-top: 50px;
    margin-bottom: 50px;

}
.stats {
    margin: 20px 0;
    font-size: 18px;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(4, 100px);
    gap: 15px;
    justify-content: center;
}

.card {
    width: 100px;
    height: 100px;
    background: #444;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    cursor: pointer;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.card.flipped {
    background: #fff;
    color: black;
}

.card.matched {
    background: #4caf50;
    color: white;
    cursor: default;
}