h2 {
    margin: 2rem;
    text-align: center;
    font-size: 3rem;
    color: yellow;
}

.card-container {
    display: grid;
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: column;
    gap: 1.25rem;
    justify-content: center;
    perspective: 1000px;
}

.card {
    width: 40mm;
    height: 60mm;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    user-select: none;
    transition: transform 0.8s;
}

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

.card .front {
    background-color: lightgreen;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    border: 2px solid yellow;
    transition: transform 0.3s;
}

.card .front:hover {
    transform: scale(1.03);
}

.card .back {
    transform: rotateY(180deg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    background-color: lightgreen;
    color: #212121;
    border: 2px solid yellow;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.card .back p {
    font-size: 10rem;
}

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

.card.disabled {
    pointer-events: none;
    transition: transform 0.4s;
}

.card.disabled.flipped {
    transform: rotateY(180deg) scale(0.97);
}

.card.disabled::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 10px;
    background-color: rgba(200, 200, 200, 0.4);
}

.card img {
    width: 150px;
    height: 150px;
}