.mf-flashcard-wrapper {
    max-width: 400px;
    margin: 30px auto;
    text-align: center;
    position: relative;
}
.mf-flashcard {
    display: none;
    perspective: 1000px;
}
.mf-flashcard.active {
    display: block;
}
.mf-card-inner {
    position: relative;
    width: 100%;
    height: 250px;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}
.mf-card-inner.flipped {
    transform: rotateY(180deg);
}
.mf-card-front, .mf-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    padding: 20px;
    backface-visibility: hidden;
    background: #f0f4f8;
    border: 2px solid #ccc;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.mf-card-back {
    transform: rotateY(180deg);
    background: #e0e0ff;
}
.mf-controls {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
}
.mf-btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #3498db;
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    flex: 1;
    margin: 0 5px;
}
.mf-btn:hover {
    background-color: #2980b9;
}