style.css

body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
}

h1 {
    margin: 20px 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    max-width: 400px;
    margin: 20px auto;
}

.card {
    width: 100px;
    height: 100px;
    perspective: 1000px;
    cursor: pointer;
}

.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}

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

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border: 1px solid #ccc;
    border-radius: 10px;
}

.card-front {
    background-color: #333;
}

.card-back {
    background-color: #fff;
    transform: rotateY(180deg);
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-back img {
    max-width: 90%;
    max-height: 90%;
}

button {
    margin: 10px auto;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0056b3;
}