/* Simple Flashcards CSS */
.simple-flashcards-container {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.flashcards-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.flashcards-title h3 {
    margin: 0;
    color: #333;
    font-size: 24px;
}

.flashcards-progress {
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.flashcards-controls {
    display: flex;
    gap: 10px;
}

.flashcard-wrapper {
    perspective: 1000px;
    margin-bottom: 20px;
}

.flashcard {
    position: relative;
    width: 100%;
    height: 300px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.flashcard:hover {
    transform: translateY(-2px);
}

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

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

.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
    border: 2px solid #f0f0f0;
}

.flashcard-front {
    background: #ffffff;
    color: #333;
}

.flashcard-back {
    background: #f8f9fa;
    color: #333;
    transform: rotateY(180deg);
}

.flashcard-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.flashcard-content p {
    font-size: 18px;
    line-height: 1.4;
    margin: 0;
    word-wrap: break-word;
    hyphens: auto;
}

.flashcard-hint {
    margin-top: 10px;
    opacity: 0.8;
}

.flashcard-hint small {
    font-size: 12px;
}

.flashcards-navigation {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 20px;
}

.flashcard-btn {
    background: #4a90e2;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    outline: none;
    box-shadow: 0 2px 4px rgba(74, 144, 226, 0.3);
}

.flashcard-btn:hover {
    background: #357abd;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(74, 144, 226, 0.4);
}

.flashcard-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(74, 144, 226, 0.3);
}

.nav-btn {
    flex: 1;
    max-width: 150px;
}

.flashcard-btn:disabled {
    background: #e9ecef;
    color: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.flashcard-btn:disabled:hover {
    background: #e9ecef;
    transform: none;
    box-shadow: none;
}

.flashcards-message {
    text-align: center;
    padding: 40px;
    background: #f8f9fa;
    border-radius: 10px;
    color: #666;
}

#flashcards-data {
    display: none;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .simple-flashcards-container {
        padding: 15px;
        margin: 10px;
    }
    
    .flashcards-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .flashcards-title h3 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .flashcards-controls {
        justify-content: center;
    }
    
    .flashcard {
        height: 250px;
    }
    
    .flashcard-front, .flashcard-back {
        padding: 15px;
    }
    
    .flashcard-content p {
        font-size: 16px;
    }
    
    .flashcards-navigation {
        flex-direction: column;
    }
    
    .nav-btn {
        max-width: none;
        margin: 5px 0;
    }
}

@media (max-width: 480px) {
    .simple-flashcards-container {
        padding: 10px;
        margin: 5px;
    }
    
    .flashcard {
        height: 200px;
    }
    
    .flashcard-front, .flashcard-back {
        padding: 10px;
    }
    
    .flashcard-content p {
        font-size: 14px;
    }
    
    .flashcard-btn {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    .flashcards-controls {
        flex-direction: column;
        gap: 5px;
    }
    
    .flashcards-title h3 {
        font-size: 18px;
    }
}