/* Flashcard flip animation */
.flashcard {
    width: 100%;
    height: 200px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    cursor: pointer;
}

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

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: transform 0.2s, box-shadow 0.2s;
}

.flashcard-back {
    transform: rotateY(180deg);
}

.flashcard:hover .flashcard-front,
.flashcard:hover .flashcard-back {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.flashcard.flipped:hover .flashcard-back {
    transform: rotateY(180deg) translateY(-2px);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .flashcard {
        height: 180px;
    }
    
    .flashcard-front,
    .flashcard-back {
        padding: 16px;
    }
}

/* Smooth animations */
* {
    transition: all 0.2s ease-in-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}