/* Reset et configuration de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Variables CSS pour la cohérence des couleurs */
:root {
    --primary-color: #4CAF50;
    --primary-hover: #45a049;
    --secondary-color: #64748b;
    --success-color: #4CAF50;
    --warning-color: #d97706;
    --error-color: #dc2626;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Configuration pour l'arabe (RTL) */
html[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

body {
    font-family: 'Noto Sans Arabic', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    direction: rtl;
    text-align: right;
}

/* Container principal */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.main-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: 0;
}

/* Header */
.header {
    background: var(--surface-color);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
    
}

.main-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.chat-icon, .correction-icon {
    font-size: 1.5rem;
    animation: pulse-scale 2s infinite;
}

@keyframes pulse-scale {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.back-to-chat {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.back-to-chat:hover {
    background-color: var(--background-color);
    color: var(--primary-color);
}

/* Section de devoir */
.devoir-section {
    background: var(--surface-color);
    margin: 1rem 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.devoir-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    padding: 1.5rem 2rem;
}

.devoir-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Images du devoir */
.devoir-images {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.devoir-images h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.image-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease;
}

.image-container:hover {
    transform: scale(1.02);
}

.image-container img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.image-number {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--primary-color);
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Texte OCR */
.devoir-ocr-text {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.devoir-ocr-text h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ocr-content {
    background: var(--background-color);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
    white-space: pre-wrap;
}

/* Correction */
.devoir-correction {
    padding: 2rem;
}

.devoir-correction h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--success-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.correction-content {
    background: var(--background-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.correction-result {
    padding: 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.correction-error {
    padding: 1.5rem;
    text-align: center;
    color: var(--error-color);
}

.retry-btn {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    margin-top: 1rem;
    transition: background-color 0.2s ease;
}

.retry-btn:hover {
    background: #b91c1c;
}

/* Spinner de chargement */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 1rem;
}

.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Section d'erreur */
.error-section {
    background: var(--surface-color);
    margin: 1rem 2rem;
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    z-index: 1;
}

.error-section h2 {
    color: var(--error-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Container de chat */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    margin: 1rem 2rem 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* Section de bienvenue */
.welcome-section {
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border-bottom: 1px solid var(--border-color);
}

.welcome-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.welcome-section p {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1.5rem;
}

.example-questions h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.question-examples {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.example-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: var(--radius-lg);
    text-align: right;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.example-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Historique du chat */
.chat-history {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    max-height: 500px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Messages */
.message {
    display: flex;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-message {
    justify-content: flex-end;
}

.bot-message {
    justify-content: flex-start;
}

.message-content {
    max-width: 80%;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    position: relative;
}

.user-message .message-content {
    background: var(--primary-color);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.bot-message .message-content {
    background: var(--background-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: var(--radius-sm);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.sender-name {
    font-weight: 600;
}

.user-message .sender-name {
    color: rgba(255, 255, 255, 0.9);
}

.bot-message .sender-name {
    color: var(--primary-color);
}

.message-time {
    opacity: 0.7;
    font-size: 0.75rem;
}

.message-text {
    line-height: 1.6;
}

.message-text strong {
    font-weight: 600;
}

.message-text em {
    font-style: italic;
}

.message-text code {
    background: rgba(0, 0, 0, 0.1);
    padding: 0.125rem 0.25rem;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

/* Indicateur de frappe */
.typing-indicator {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.typing-indicator span {
    width: 0.5rem;
    height: 0.5rem;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Message système */
.system-message {
    text-align: center;
    padding: 1rem;
    background: var(--success-color);
    color: white;
    border-radius: var(--radius-lg);
    margin: 0.5rem 0;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Container de saisie */
.chat-input-container {
    padding: 1rem;
    background: var(--background-color);
    border-top: 1px solid var(--border-color);
}

.chat-input {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

#user-input {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    background: var(--surface-color);
    color: var(--text-primary);
    transition: all 0.2s ease;
    direction: rtl;
    text-align: right;
}

#user-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#user-input::placeholder {
    color: var(--text-muted);
    direction: rtl;
    text-align: right;
}

#send-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 3.5rem;
}

#send-button:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

#send-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.send-icon, .loading-icon {
    font-size: 1.125rem;
}

.input-actions {
    display: flex;
    justify-content: center;
}

#clear-chat {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

#clear-chat:hover {
    background: var(--error-color);
    color: white;
    border-color: var(--error-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        margin: 0;
        border-radius: 0;
    }
    
    .header {
        padding: 1rem;
        
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .devoir-section,
    .chat-container,
    .error-section {
        margin: 0.5rem;
        border-radius: var(--radius-lg);
    }
    
    .devoir-images,
    .devoir-ocr-text,
    .devoir-correction {
        padding: 1rem;
    }
    
    .images-grid {
        grid-template-columns: 1fr;
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .question-examples {
        gap: 0.5rem;
    }
    
    .example-btn {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
    
    .chat-input {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    #user-input {
        width: 100%;
    }
    
    
}

@media (max-width: 480px) {
    .header {
        padding: 20px;
        margin-left: 10px;
    margin-right: 10px;

    }
    
    .title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .main-title {
        font-size: 1.25rem;
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .welcome-section {
        padding: 1rem;
    }
    
    .chat-history {
        max-height: 400px;
    }
    
    .devoir-header {
        padding: 1rem;
    }
    
    .devoir-header h2 {
        font-size: 1.25rem;
    }
}

/* Améliorations pour l'accessibilité */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Mode sombre (optionnel) */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --surface-color: #1e293b;
        --border-color: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #64748b;
    }
    
    .main-container {
        background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    }
    
    .welcome-section {
        background: linear-gradient(135deg, #1e293b, #334155);
    }
    
    .example-btn {
        background: var(--surface-color);
        color: var(--text-primary);
    }
    
    #user-input {
        background: var(--surface-color);
        color: var(--text-primary);
    }
}



/* --- Styles d'upload d'image (Ajouté) --- */

/* Conteneur principal de la zone de saisie */
.chat-input-container {
    display: flex;
    flex-direction: column; /* Permet d'empiler l'aperçu et la zone de saisie */
    border-top: 1px solid var(--border-color);
    background: var(--surface-color);
}

/* Zone de saisie et boutons */
.chat-input-wrapper {
    display: flex;
    flex-direction: column; /* Pour empiler l'input et le bloc d'upload */
    padding: 1rem;
}

.chat-input-area {
    display: flex;
    align-items: center;
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface-color);
}

#user-input {
    flex-grow: 1;
    border: none;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    background: transparent;
    resize: none;
    min-height: 40px;
}

#user-input:focus {
    outline: none;
}

#send-button {
    background: var(--primary-color);
    border: none;
    color: white;
    font-size: 1.2rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-right: 0.5rem;
}

#send-button:hover {
    background: var(--primary-hover);
}

#send-button:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

/* Style du bloc d'upload d'image (nouveau) */
#image-upload-block {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-color);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

#image-upload-block:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: #f0fdf4; /* Un léger fond vert clair */
}

#image-upload-block i {
    margin-left: 0.5rem;
    font-size: 1.2rem;
}

/* Conteneur de l'aperçu de l'image */
.image-preview-container {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--background-color);
    max-height: 100px;
    overflow-y: auto;
    border-bottom: 1px solid var(--border-color); /* Changé de border-top à border-bottom */
    display: none; /* Caché par défaut */
}

.image-preview-container.active {
    display: flex;
}

.image-preview {
    max-width: 80px;
    max-height: 80px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    margin-left: 1rem;
    box-shadow: var(--shadow-sm);
}

.image-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

.remove-image-btn {
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.7rem;
    margin-right: 0.5rem;
    transition: background-color 0.2s ease;
}

.remove-image-btn:hover {
    background: #b91c1c;
}

/* Affichage de l'image dans l'historique du chat */
.chat-image {
    max-width: 100%;
    height: auto;
    max-height: 200px; /* Limiter la taille pour l'affichage dans le chat */
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    cursor: zoom-in;
}

/* --- Fin des styles d'upload d'image --- */