body {
    background-color: #f8f9fa;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

/* Styles pour la barre de navigation */
.navbar .nav-link {
    font-size: 20px !important;
    font-weight: 500 !important;
    padding: 8px 12px !important;
}

.navbar .navbar-brand {
    font-size: 18px !important;
    font-weight: 600 !important;
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.btn-primary {
    padding: 10px 20px;
    border-radius: 5px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

h1 {
    color: #333;
    font-weight: 600;
}

.text-muted {
    font-size: 1.1rem;
}

/* Styles pour les exercices */
.exercise-content {
    margin-top: 1rem;
}

/* Text holes */
.text-holes-form input[type="text"] {
    width: 120px;
    display: inline-block;
    margin: 0 0.5rem;
}

.word-bank {
    min-height: 50px;
    padding: 10px;
    border-radius: 5px;
}

/* Word placement */
.draggable-word {
    cursor: move;
    user-select: none;
}

.category-drop {
    min-height: 100px;
    border: 2px dashed #ccc;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
}

.category-drop.drag-over {
    background-color: #f8f9fa;
    border-color: #0d6efd;
}

.draggable-word.dragging {
    opacity: 0.5;
}

.draggable-word.placed {
    cursor: not-allowed;
}

/* Flashcards */
.flashcard {
    perspective: 1000px;
    margin-bottom: 20px;
    height: 400px;
}

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

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

.flashcard-front, .flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

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

.flashcard img {
    max-width: 100%;
    max-height: 250px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.answer-input {
    max-width: 300px;
    margin: 0 auto;
}

.verify-btn {
    margin-top: 1rem;
}

.feedback {
    margin-top: 1rem;
    padding: 0.5rem;
    border-radius: 4px;
}

.feedback.correct {
    background-color: #d4edda;
    color: #155724;
}

.feedback.incorrect {
    background-color: #f8d7da;
    color: #721c24;
}

.question-text, .answer-text {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* Pairs Exercise */
.pairs-exercise {
    position: relative;
}

.pair-item {
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.pair-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.pair-item.selected {
    border-color: #007bff;
    background-color: #f8f9fa;
}

.pair-item.correct {
    border-color: #28a745;
    background-color: #d4edda;
}

.pair-item.incorrect {
    border-color: #dc3545;
    background-color: #f8d7da;
}

.connection-lines {
    position: relative;
    width: 100%;
    height: 100%;
}

.connection-line {
    position: absolute;
    height: 2px;
    background-color: #007bff;
    transform-origin: left center;
    pointer-events: none;
}

.connection-line.correct {
    background-color: #28a745;
}

.connection-line.incorrect {
    background-color: #dc3545;
}

.pair-item img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 10px;
}

.left-items, .right-items {
    min-height: 200px;
}

/* Styles pour le formulaire de création d'exercice */
.card {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
}

.flashcard-item, .pair-item {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.flashcard-item:hover, .pair-item:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

.form-control {
    border: 1px solid #ced4da;
    border-radius: 4px;
    padding: 0.5rem;
    transition: border-color 0.15s ease-in-out;
}

.form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

input[type="file"].form-control {
    padding: 0.375rem 0.75rem;
    background-color: #f8f9fa;
    border: 1px dashed #ced4da;
    cursor: pointer;
}

input[type="file"].form-control:hover {
    background-color: #e9ecef;
}

.btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

.btn-danger.btn-sm {
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
}

.btn i {
    margin-right: 0.5rem;
}

/* Styles pour les aperçus d'images */
.image-preview {
    max-width: 100%;
    max-height: 200px;
    margin-top: 0.5rem;
    border-radius: 4px;
    display: none;
}

.image-preview.show {
    display: block;
}

/* Animation pour l'ajout/suppression de cartes */
.flashcard-item, .pair-item {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Styles pour le conteneur des cartes */
#flashcards_container, #pairs_container {
    margin-bottom: 1rem;
}

/* Style pour les boutons d'ajout */
.btn-add {
    width: 100%;
    margin-bottom: 1rem;
    padding: 1rem;
    border: 2px dashed #dee2e6;
    background-color: #f8f9fa;
    color: #6c757d;
    transition: all 0.3s ease;
}

.btn-add:hover {
    background-color: #e9ecef;
    border-color: #ced4da;
}