.flip-card {
    background-color: transparent;
    width: 100px;
    height: 300px;
    perspective: 1000px;
    margin-bottom: 20px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: 0 0px 0px 0;
}

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

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
}

.flip-card-front {
    background-color: #ffffff;
    color: black;
}

.flip-card-back {
    background-color: #2980b9;
    color: white;
    transform: rotateY(180deg);
}

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

.flip-button {
    margin-top: 10px;
    padding: 5px 10px;
    background-color: #2980b9;
    color: white;
    border: none;
    cursor: pointer;
}