body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
}

h1 {
    margin-bottom: 20px;
}

#game-board {
    display: grid;
    grid-template-columns: repeat(5, 100px);
    grid-gap: 10px;
    justify-content: center;
    margin: 0 auto;
    max-width: 550px;
}


#reset-button {
    margin-bottom: 20px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}
.card {
    width: 100px;
    height: 100px;
    position: relative;
    cursor: pointer;
    perspective: 1000px; /* Fixes 3D rendering issues in Safari */
}

.card .front,
.card .back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    transition: transform 0.5s;
}

.card .front {
    transform: rotateY(180deg);
}

.card .back {
    background-color: #4caf50;
    transform: rotateY(0deg);
}

.card.flipped .front {
    transform: rotateY(0deg);
}

.card.flipped .back {
    transform: rotateY(180deg);
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card.matched {
    visibility: hidden;
}