:root {
        --primary: #7c3aed;
        --primary-light: #A78BFA;
        --primary-bg: #F5F3FF;
        --success: #10B981;
        --warning: #F59E0B;
        --danger: #EF4444;
        --gray-50: #F9FAFB;
        --gray-100: #F3F4F6;
        --gray-200: #E5E7EB;
        --gray-300: #D1D5DB;
        --gray-500: #6B7280;
        --gray-700: #374151;
        --gray-900: #111827;
    }
    
    * { box-sizing: border-box; }
    
    body {
        font-family: 'Inter', sans-serif;
        background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 50%, #faf5ff 100%);
        min-height: 100vh;
        margin: 0;
        padding-top: 90px; /* Compenser le header fixe avec logo */
    }
    
    .page-container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 1.5rem;
    }
    
    /* Header */
    .page-header {
        text-align: center;
        margin-bottom: 2rem;
    }
    .back-link {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        color: var(--gray-500);
        text-decoration: none;
        font-weight: 500;
        margin-bottom: 1rem;
        transition: color 0.2s;
    }
    .back-link:hover { color: var(--primary); }
    
    .badge-row {
        display: flex;
        justify-content: center;
        gap: 0.75rem;
        margin-bottom: 1rem;
        flex-wrap: wrap;
    }
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
        padding: 0.4rem 0.9rem;
        border-radius: 2rem;
        font-size: 0.85rem;
        font-weight: 600;
    }
    .badge-success {
        background: linear-gradient(135deg, #10B981, #059669);
        color: white;
    }
    .badge-info {
        background: linear-gradient(135deg, #8B5CF6, #7C3AED);
        color: white;
    }
    .badge-purple {
        background: linear-gradient(135deg, #EC4899, #DB2777);
        color: white;
    }
    
    .page-header h1 {
        font-size: 2.25rem;
        font-weight: 800;
        color: var(--gray-900);
        margin: 0 0 0.5rem;
    }
    .page-header p {
        color: var(--gray-500);
        font-size: 1.05rem;
        margin: 0;
    }
    
    /* Main Grid */
    .main-grid {
        display: grid;
        grid-template-columns: 1fr 580px;
        gap: 1.5rem;
        align-items: start;
    }
    @media (max-width: 1250px) {
        .main-grid {
            grid-template-columns: 1fr;
        }
    }
    
    /* Cards */
    .card {
        background: white;
        border-radius: 1rem;
        box-shadow: 0 4px 20px rgba(0,0,0,0.06);
        overflow: hidden;
    }
    .card-header {
        padding: 1.25rem 1.5rem;
        border-bottom: 1px solid var(--gray-100);
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }
    .card-header h2 {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--gray-900);
        margin: 0;
    }
    .card-header i {
        color: var(--primary);
        font-size: 1.1rem;
    }
    .card-body {
        padding: 1.5rem;
    }
    
    /* Tabs */
    .tabs {
        display: flex;
        border-bottom: 2px solid var(--gray-100);
        padding: 0 1.5rem;
        gap: 0;
        overflow-x: auto;
    }
    .tab {
        padding: 1rem 1.25rem;
        font-weight: 600;
        color: var(--gray-500);
        cursor: pointer;
        border-bottom: 2px solid transparent;
        margin-bottom: -2px;
        transition: all 0.2s;
        white-space: nowrap;
        background: none;
        border-left: none;
        border-right: none;
        border-top: none;
        font-size: 0.95rem;
    }
    .tab:hover {
        color: var(--primary);
    }
    .tab.active {
        color: var(--primary);
        border-bottom-color: var(--primary);
    }
    .tab-content {
        display: none;
        padding: 1.5rem;
    }
    .tab-content.active {
        display: block;
    }
    
    /* Form Sections */
    .form-section {
        margin-bottom: 1.5rem;
    }
    .form-section:last-child {
        margin-bottom: 0;
    }
    .form-label {
        display: block;
        font-weight: 600;
        color: var(--gray-700);
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
    }
    
    /* Difficulty Pills */
    .difficulty-pills {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    .difficulty-pill {
        padding: 0.5rem 1rem;
        border-radius: 2rem;
        border: 2px solid var(--gray-200);
        background: white;
        cursor: pointer;
        font-weight: 500;
        font-size: 0.9rem;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        gap: 0.3rem;
    }
    .difficulty-pill:hover {
        border-color: var(--gray-300);
    }
    .difficulty-pill.active {
        border-color: var(--primary);
        background: var(--primary-bg);
        color: var(--primary);
    }
    .difficulty-pill input {
        display: none;
    }
    
    /* Temps selector (pour conjugaison) */
    .temps-selector {
        margin-top: 1rem;
        padding: 1rem;
        background: var(--gray-50);
        border-radius: 0.5rem;
        border: 1px solid var(--gray-200);
    }
    .temps-pills {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    .temps-pill {
        padding: 0.4rem 0.8rem;
        border-radius: 1.5rem;
        border: 2px solid var(--gray-200);
        background: white;
        cursor: pointer;
        font-weight: 500;
        font-size: 0.85rem;
        transition: all 0.2s;
    }
    .temps-pill:hover {
        border-color: var(--gray-300);
    }
    .temps-pill.active {
        border-color: var(--primary);
        background: var(--primary-bg);
        color: var(--primary);
    }
    .temps-pill input {
        display: none;
    }
    
    /* Son Selector (Phonologie) */
    .son-selector {
        margin-top: 1rem;
        padding: 1rem;
        background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
        border-radius: 0.75rem;
        border: 2px solid #86efac;
    }
    .son-categories {
        margin-top: 0.75rem;
    }
    .son-category {
        margin-bottom: 0.75rem;
    }
    .son-category:last-child {
        margin-bottom: 0;
    }
    .son-category-title {
        font-size: 0.75rem;
        font-weight: 600;
        color: #166534;
        margin-bottom: 0.4rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .son-pills {
        display: flex;
        gap: 0.4rem;
        flex-wrap: wrap;
    }
    .son-pill {
        padding: 0.35rem 0.7rem;
        border-radius: 1.5rem;
        border: 2px solid #bbf7d0;
        background: white;
        cursor: pointer;
        font-weight: 600;
        font-size: 0.85rem;
        transition: all 0.2s;
        min-width: 36px;
        text-align: center;
    }
    .son-pill:hover {
        border-color: #22c55e;
        background: #f0fdf4;
    }
    .son-pill.active {
        border-color: #22c55e;
        background: #22c55e;
        color: white;
    }
    .son-pill input {
        display: none;
    }
    
    /* Type Cards */
    .type-category {
        margin-bottom: 1.25rem;
    }
    .type-category:last-child {
        margin-bottom: 0;
    }
    .category-title {
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--gray-500);
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 0.5rem;
        padding-left: 0.25rem;
    }
    .type-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 0.5rem;
    }
    .type-card {
        padding: 0.75rem;
        border: 2px solid var(--gray-200);
        border-radius: 0.75rem;
        cursor: pointer;
        transition: all 0.2s;
        background: white;
    }
    .type-card:hover {
        border-color: var(--gray-300);
        transform: translateY(-1px);
    }
    .type-card.active {
        border-color: var(--primary);
        background: var(--primary-bg);
    }
    .type-card input {
        display: none;
    }
    .type-card-content {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    .type-emoji {
        font-size: 1.25rem;
    }
    .type-info {
        flex: 1;
        min-width: 0;
    }
    .type-label {
        font-weight: 600;
        font-size: 0.85rem;
        color: var(--gray-900);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .type-desc {
        font-size: 0.75rem;
        color: var(--gray-700);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    /* Range Slider */
    .range-container {
        display: flex;
        align-items: center;
        gap: 1rem;
    }
    .range-slider {
        flex: 1;
        -webkit-appearance: none;
        appearance: none;
        height: 8px;
        border-radius: 4px;
        background: var(--gray-200);
        outline: 2px solid transparent;
    }
    .range-slider::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: var(--primary);
        cursor: pointer;
        box-shadow: 0 2px 6px rgba(139, 92, 246, 0.4);
    }
    .range-value {
        min-width: 50px;
        padding: 0.5rem 0.75rem;
        background: var(--primary-bg);
        border-radius: 0.5rem;
        text-align: center;
        font-weight: 700;
        color: var(--primary);
    }
    
    /* Theme & Layout Selects */
    .select-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    .custom-select {
        width: 100%;
        padding: 0.75rem 1rem;
        border: 2px solid var(--gray-200);
        border-radius: 0.75rem;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--gray-700);
        background: white;
        cursor: pointer;
        transition: border-color 0.2s;
    }
    .custom-select:focus {
        outline: 2px solid transparent;
        border-color: var(--primary);
    }
    
    /* Checkbox */
    .checkbox-label {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        cursor: pointer;
        font-weight: 500;
        color: var(--gray-700);
    }
    .checkbox-label input[type="checkbox"] {
        width: 18px;
        height: 18px;
        accent-color: var(--primary);
    }
    
    /* Action Button */
    .action-buttons {
        display: flex;
        gap: 0.75rem;
        margin-top: 1.5rem;
    }
    .btn {
        flex: 1;
        padding: 1rem 1.5rem;
        border-radius: 0.75rem;
        font-weight: 700;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        border: none;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary), #7C3AED);
        color: white;
        box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
    }
    .btn-secondary {
        background: var(--gray-100);
        color: var(--gray-700);
    }
    .btn-secondary:hover {
        background: var(--gray-200);
    }
    
    /* Preview Panel */
    .preview-panel {
        position: sticky;
        top: 1.5rem;
    }
    .preview-panel .card {
        overflow: visible;
    }
    .preview-fiche {
        background: white;
        border: 1px solid var(--gray-200);
        border-radius: 0.5rem;
        font-size: 0.75rem;
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }
    .preview-header-content {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        background: linear-gradient(135deg, var(--theme-accent, #F5F3FF) 0%, #ffffff 100%);
        padding: 0.75rem;
        border-radius: 0.5rem 0.5rem 0 0;
        border-bottom: 2px solid var(--theme-primary, var(--primary));
    }
    .preview-logo {
        width: 36px;
        height: 36px;
        border-radius: 6px;
    }
    .preview-titre-wrapper {
        flex: 1;
        border-left: 3px solid var(--theme-primary, var(--primary));
        padding-left: 0.6rem;
    }
    .preview-title {
        font-weight: 700;
        font-size: 0.9rem;
        color: var(--theme-primary, var(--primary));
        margin-bottom: 0.1rem;
    }
    .preview-subtitle {
        font-size: 0.7rem;
        color: var(--theme-secondary, var(--gray-500));
        font-weight: 500;
    }
    .preview-badge-difficulte {
        display: inline-block;
        padding: 0.1rem 0.4rem;
        border-radius: 1rem;
        font-size: 0.6rem;
        font-weight: 600;
        color: white;
        margin-left: 0.3rem;
    }
    .preview-score-box {
        background: var(--theme-primary, var(--primary));
        color: white;
        padding: 0.25rem 0.5rem;
        border-radius: 0.3rem;
        font-weight: 700;
        font-size: 0.75rem;
    }
    .preview-header {
        padding: 0.75rem;
        text-align: center;
        border-bottom: 2px solid var(--primary);
    }
    .preview-info {
        display: flex;
        justify-content: space-between;
        padding: 0.4rem 0.6rem;
        font-size: 0.65rem;
        color: var(--gray-600);
        background: var(--theme-accent, #F5F3FF);
        border-radius: 0.3rem;
        margin: 0.5rem 0.75rem;
    }
    .preview-info .label {
        color: var(--theme-secondary, var(--primary));
        font-weight: 600;
    }
    .preview-content {
        padding: 0.75rem !important;
        min-height: 200px !important;
        max-height: 400px !important;
        overflow-y: auto !important;
        display: block !important;
        visibility: visible !important;
    }
    .preview-exercices-grid {
        display: grid;
        gap: 0.4rem;
    }
    .preview-exercices-grid.cols-1 { grid-template-columns: 1fr; }
    .preview-exercices-grid.cols-2 { grid-template-columns: 1fr 1fr; }
    .preview-exercices-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
    .preview-exercice {
        padding: 0.4rem 0.5rem;
        border: 1px solid var(--theme-accent, var(--gray-100));
        border-left: 3px solid var(--theme-primary, var(--primary));
        border-radius: 0.25rem;
        background: #fafafa;
        position: relative;
        overflow: auto;
    }
    .preview-exercice:last-child {
        margin-bottom: 0;
    }
    .preview-exercice-top {
        display: flex;
        align-items: flex-start;
        gap: 0.3rem;
        margin-bottom: 0.2rem;
    }
    .preview-numero {
        float: left;
        color: var(--theme-primary, var(--primary));
        font-weight: 700;
        font-size: 0.9rem;
        margin-right: 0.4rem;
        line-height: 1.5;
    }
    .preview-consigne {
        background: var(--theme-accent, #EEF2FF);
        border-left: 3px solid var(--theme-primary, #4F46E5);
        padding: 8px 12px;
        font-size: 0.75rem;
        line-height: 1.4;
        color: var(--theme-secondary, var(--primary));
        font-weight: 600;
    }
    .preview-phrase {
        font-size: 0.7rem;
        color: var(--gray-700);
        background: var(--gray-50);
        padding: 0.3rem 0.4rem;
        border-radius: 0.25rem;
        margin: 0.2rem 0;
        border-left: 2px solid var(--theme-primary, var(--primary));
    }
    .preview-reponse {
        border-bottom: 1px dotted var(--theme-secondary, var(--gray-300));
        min-height: 0.8rem;
    }
    .preview-footer {
        padding: 0.5rem;
        text-align: center;
        font-size: 0.6rem;
        color: var(--gray-500);
        border-top: 1px solid var(--gray-100);
        display: flex;
        justify-content: space-between;
    }
    
    /* Mode Toggle */
    .mode-toggle {
        display: flex;
        background: var(--gray-100);
        border-radius: 0.5rem;
        padding: 0.25rem;
        margin-bottom: 1rem;
    }
    .mode-btn {
        flex: 1;
        padding: 0.5rem 1rem;
        border: none;
        background: transparent;
        border-radius: 0.35rem;
        font-weight: 600;
        font-size: 0.85rem;
        color: var(--gray-700);
        cursor: pointer;
        transition: all 0.2s;
    }
    .mode-btn.active {
        background: white;
        color: var(--primary);
        box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }
    
    /* Multi Mode */
    .multi-type-selector {
        display: none;
    }
    .multi-type-selector.active {
        display: block;
    }
    .multi-type-item {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        padding: 0.75rem;
        background: var(--gray-50);
        border-radius: 0.5rem;
        margin-bottom: 0.5rem;
    }
    .multi-type-item:last-child {
        margin-bottom: 0;
    }
    .multi-type-check {
        width: 18px;
        height: 18px;
        accent-color: var(--primary);
    }
    .multi-type-info {
        flex: 1;
    }
    .multi-type-label {
        font-weight: 600;
        font-size: 0.85rem;
    }
    .multi-type-count {
        width: 60px;
        padding: 0.35rem 0.5rem;
        border: 1px solid var(--gray-200);
        border-radius: 0.35rem;
        text-align: center;
        font-weight: 600;
    }
    
    /* Loading state */
    .loading {
        opacity: 0.6;
        pointer-events: none;
    }

    /* Generate buttons container */
    .generate-buttons-container {
        display: flex;
        gap: 0.75rem;
    }
    .generate-buttons-container .btn {
        flex: 1;
    }
    .btn-multiniveau {
        background: linear-gradient(135deg, #10B981 0%, #22C55E 33%, #F59E0B 66%, #EF4444 100%) !important;
        border: none !important;
    }

    @media (max-width: 768px) {
        .page-header h1 {
            font-size: 1.75rem;
        }
        .select-grid {
            grid-template-columns: 1fr;
        }
        .type-grid {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 480px) {
        .page-container {
            padding: 0.75rem;
            overflow-x: hidden;
        }
        .page-header h1 {
            font-size: 1.5rem;
        }
        .badge-row {
            gap: 0.5rem;
        }
        .badge {
            padding: 0.3rem 0.6rem;
            font-size: 0.75rem;
        }
        .card-header {
            padding: 1rem;
        }
        .card-body {
            padding: 1rem;
        }
        .generate-buttons-container {
            flex-direction: column;
        }
        .generate-buttons-container .btn {
            font-size: 0.9rem;
            padding: 0.8rem 1rem;
        }
        .type-card {
            padding: 0.75rem 1rem;
        }
        .type-card-content {
            gap: 0.75rem;
        }
        .type-icon {
            font-size: 1.25rem;
            min-width: 28px;
        }
        .type-name {
            font-size: 0.9rem;
        }
        .type-desc {
            font-size: 0.75rem;
        }
        .section-label {
            font-size: 0.75rem;
        }
    }

    /* Panneau Copies par niveau */
    .copies-helper-panel {
        background: white;
        border-radius: 1rem;
        padding: 1.5rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        margin-top: 2rem;
    }
    .copies-helper-header {
        display: flex;
        align-items: flex-start;
        gap: 1rem;
        margin-bottom: 1.25rem;
    }
    .copies-helper-icon {
        font-size: 2rem;
        line-height: 1;
    }
    .copies-helper-header h3 {
        margin: 0 0 0.25rem 0;
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--gray-900);
    }
    .copies-helper-header p {
        margin: 0;
        font-size: 0.875rem;
        color: var(--gray-500);
    }
    .copies-helper-selects {
        display: flex;
        gap: 1rem;
        margin-bottom: 1rem;
        flex-wrap: wrap;
    }
    .copies-select {
        padding: 0.5rem 1rem;
        border: 1px solid var(--gray-300);
        border-radius: 0.5rem;
        font-size: 0.9rem;
        background: white;
        cursor: pointer;
        min-width: 180px;
    }
    .copies-select:focus {
        outline: 2px solid transparent;
        border-color: var(--primary);
    }
    .level-stats-container {
        margin-top: 1rem;
    }
    .level-stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
        margin-bottom: 1rem;
    }
    @media (max-width: 768px) {
        .level-stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    .level-stat-card {
        padding: 1rem;
        border-radius: 0.75rem;
        text-align: center;
        border: 2px solid transparent;
    }
    .level-stat-card .level-name {
        font-weight: 600;
        font-size: 0.95rem;
        margin-bottom: 0.25rem;
    }
    .level-stat-card .level-stars {
        font-size: 0.75rem;
        margin-bottom: 0.5rem;
        opacity: 0.7;
    }
    .level-stat-card .level-count {
        font-size: 1.75rem;
        font-weight: 700;
    }
    .level-stat-card .level-label {
        font-size: 0.8rem;
        color: var(--gray-500);
    }
    .level-stats-footer {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-top: 1rem;
        border-top: 1px solid var(--gray-200);
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    #totalStudentsStatsFr {
        font-weight: 600;
        color: var(--gray-700);
    }
    .link-to-students {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        color: var(--primary);
        font-size: 0.875rem;
        font-weight: 500;
        text-decoration: none;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0.5rem 0.75rem;
        border-radius: 0.5rem;
        transition: background-color 0.2s;
    }
    .link-to-students:hover {
        background-color: var(--primary-bg);
    }

/* ===== DARK MODE ===== */
[data-theme="dark"] body { background: linear-gradient(135deg, #1a1535 0%, #1e1a3a 50%, #1a1535 100%) !important; }
[data-theme="dark"] .page-header h1 { color: #f1f5f9 !important; }
[data-theme="dark"] .page-header p { color: #94a3b8 !important; }
[data-theme="dark"] .card { background: #1e293b !important; box-shadow: 0 4px 20px rgba(0,0,0,0.3) !important; }
[data-theme="dark"] .card-header { border-bottom-color: #334155 !important; }
[data-theme="dark"] .card-header h2 { color: #f1f5f9 !important; }
[data-theme="dark"] .tabs { border-bottom-color: #334155 !important; }
[data-theme="dark"] .tab { color: #94a3b8 !important; }
[data-theme="dark"] .tab.active { color: #a5b4fc !important; border-bottom-color: #a5b4fc !important; }
[data-theme="dark"] .tab:hover { color: #cbd5e1 !important; background: rgba(255,255,255,0.05) !important; }
[data-theme="dark"] .back-link { color: #94a3b8 !important; }
[data-theme="dark"] .back-link:hover { color: #a5b4fc !important; }
[data-theme="dark"] #totalStudentsStatsFr { color: #cbd5e1 !important; }
[data-theme="dark"] .link-to-students { color: #a5b4fc !important; }
[data-theme="dark"] .link-to-students:hover { background-color: rgba(99,102,241,0.15) !important; }
[data-theme="dark"] .form-label { color: #cbd5e1 !important; }
[data-theme="dark"] .difficulty-pill { background: #243044 !important; border-color: #334155 !important; color: #94a3b8 !important; }
[data-theme="dark"] .difficulty-pill:hover { border-color: #475569 !important; }
[data-theme="dark"] .difficulty-pill.active { border-color: #7c3aed !important; background: rgba(124,58,237,0.15) !important; color: #a78bfa !important; }
[data-theme="dark"] .temps-selector { background: #162032 !important; border-color: #334155 !important; }
[data-theme="dark"] .temps-pill { background: #243044 !important; border-color: #334155 !important; color: #94a3b8 !important; }
[data-theme="dark"] .temps-pill.active { border-color: #7c3aed !important; background: rgba(124,58,237,0.15) !important; color: #a78bfa !important; }