/**
 * ESPACE BLEU SCHOOL - STYLES CENTRALISÉS
 * Fichier CSS principal pour toute l'application
 * Version: 1.0.0
 * Date: 2025-12-22
 */

/* ============================================
   1. RESET & BASE
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    font-size: 0.9rem;
}

/* ============================================
   2. VARIABLES CSS - THÈME CLAIR
   ============================================ */

:root {
    /* Couleurs principales */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;

    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;

    --border-color: #dee2e6;
    --border-color-light: #e9ecef;

    /* Couleurs sémantiques */
    --primary: #4361ee;
    --primary-hover: #3651d4;
    --success: #28a745;
    --success-hover: #218838;
    --danger: #dc3545;
    --danger-hover: #c82333;
    --warning: #ffc107;
    --warning-hover: #e0a800;
    --info: #17a2b8;
    --info-hover: #138496;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-danger: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
    --gradient-info: linear-gradient(135deg, #00b4db 0%, #0083b0 100%);

    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.2);

    /* Rayons de bordure */
    --radius-sm: 5px;
    --radius: 10px;
    --radius-lg: 15px;
    --radius-xl: 20px;

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* ============================================
   3. VARIABLES CSS - THÈME SOMBRE
   ============================================ */

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f1626;

    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;

    --border-color: #2d3748;
    --border-color-light: #1f2937;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
}

/* ============================================
   4. TYPOGRAPHIE
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing);
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p {
    margin-bottom: var(--spacing);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

strong {
    font-weight: 600;
}

/* ============================================
   5. LAYOUT - CONTAINER
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing);
}

/* ============================================
   6. HEADER
   ============================================ */

.header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg) var(--spacing);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing);
}

.header-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0;
    color: white;
}

.header-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
}

.header-actions {
    display: flex;
    gap: var(--spacing);
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
}

.user-info i {
    font-size: 1.2rem;
}

/* ============================================
   7. NAVIGATION
   ============================================ */

.navigation {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
    padding: 0;
    position: sticky;
    top: 10px;
    z-index: 100;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--bg-secondary);
    color: var(--primary);
    text-decoration: none;
}

.nav-link.active {
    background: var(--primary);
    color: white;
}

.nav-link i {
    font-size: 1.1rem;
}

/* Dropdown menu */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    display: none;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.nav-item:hover .nav-dropdown {
    display: block;
}

.nav-dropdown .nav-link {
    padding: var(--spacing-sm) var(--spacing);
}

/* Badge "Nouveau" */
.badge-new {
    background: var(--danger);
    color: white;
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
    text-transform: uppercase;
    margin-left: var(--spacing-xs);
}

/* ============================================
   8. BOUTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 44px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Variantes de boutons */
.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: white;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: var(--success-hover);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-hover);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: #212529;
}

.btn-warning:hover {
    background: var(--warning-hover);
    color: #212529;
}

.btn-info {
    background: var(--info);
    color: white;
}

.btn-info:hover {
    background: var(--info-hover);
    color: white;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* Tailles de boutons */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing);
    font-size: 0.85rem;
    min-height: 36px;
}

.btn-lg {
    padding: var(--spacing) var(--spacing-lg);
    font-size: 1rem;
    min-height: 52px;
}

/* ============================================
   9. FORMULAIRES
   ============================================ */

.form-section {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing);
    margin-bottom: var(--spacing);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger);
}

.form-control {
    padding: var(--spacing-sm) var(--spacing);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
    min-height: 44px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.form-control:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-control.error {
    border-color: var(--danger);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

.form-help {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.85rem;
    color: var(--danger);
    margin-top: var(--spacing-xs);
}

.form-actions {
    display: flex;
    gap: var(--spacing);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Checkbox et Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* ============================================
   10. TABLEAUX
   ============================================ */

.table-container {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.table-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing);
}

.table-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.table-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    padding: var(--spacing);
    text-align: left;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: var(--spacing);
    border-bottom: 1px solid var(--border-color-light);
    color: var(--text-primary);
}

tr:hover {
    background: var(--bg-secondary);
}

tr:last-child td {
    border-bottom: none;
}

.table-actions-cell {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* ============================================
   11. CARDS & STATS
   ============================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-card.success {
    border-left-color: var(--success);
}

.stat-card.danger {
    border-left-color: var(--danger);
}

.stat-card.warning {
    border-left-color: var(--warning);
}

.stat-card.info {
    border-left-color: var(--info);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--bg-secondary);
    color: var(--primary);
}

.stat-card.success .stat-icon {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
}

.stat-card.danger .stat-icon {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

.stat-card.warning .stat-icon {
    background: rgba(255, 193, 7, 0.1);
    color: var(--warning);
}

.stat-card.info .stat-icon {
    background: rgba(23, 162, 184, 0.1);
    color: var(--info);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   12. BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1;
}

.badge-primary {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary);
}

.badge-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
}

.badge-danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

.badge-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.badge-info {
    background: rgba(23, 162, 184, 0.1);
    color: var(--info);
}

.badge-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* ============================================
   13. MESSAGES & ALERTES
   ============================================ */

.message {
    padding: var(--spacing);
    border-radius: var(--radius);
    margin-bottom: var(--spacing);
    display: flex;
    align-items: center;
    gap: var(--spacing);
    animation: slideDown 0.3s ease-out;
}

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

.message-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.message-error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.message-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left: 4px solid var(--warning);
}

.message-info {
    background: rgba(23, 162, 184, 0.1);
    color: var(--info);
    border-left: 4px solid var(--info);
}

.message i {
    font-size: 1.3rem;
}

.message-close {
    margin-left: auto;
    cursor: pointer;
    opacity: 0.7;
}

.message-close:hover {
    opacity: 1;
}

/* ============================================
   14. MODALES
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

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

.modal {
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius) var(--radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.modal-close:hover {
    opacity: 1;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing);
    justify-content: flex-end;
}

/* ============================================
   15. TABS
   ============================================ */

.tabs {
    display: flex;
    gap: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.tab {
    padding: var(--spacing) var(--spacing-lg);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition-fast);
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* ============================================
   16. PAGINATION
   ============================================ */

.pagination {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.page-link {
    padding: var(--spacing-sm) var(--spacing);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
    min-width: 44px;
    text-align: center;
}

.page-link:hover {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
    text-decoration: none;
}

.page-link.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.page-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================
   17. LOADING & SPINNERS
   ============================================ */

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

[data-theme="dark"] .loading-overlay {
    background: rgba(26, 26, 46, 0.9);
}

.loading-text {
    margin-top: var(--spacing);
    font-size: 1.1rem;
    color: var(--text-primary);
}

/* ============================================
   18. UTILITAIRES
   ============================================ */

/* Marges */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing); }
.mt-3 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing); }
.mb-3 { margin-bottom: var(--spacing-md); }
.my-1 { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-2 { margin-top: var(--spacing); margin-bottom: var(--spacing); }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing); }
.p-3 { padding: var(--spacing-md); }

/* Texte */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-bold { font-weight: 600; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: #856404; }
.text-info { color: var(--info); }

/* Affichage */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Flexbox */
.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.align-start { align-items: flex-start; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing); }
.gap-3 { gap: var(--spacing-md); }

/* Largeur */
.w-100 { width: 100%; }
.w-75 { width: 75%; }
.w-50 { width: 50%; }
.w-25 { width: 25%; }

/* ============================================
   19. THEME TOGGLE
   ============================================ */

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(180deg);
}

/* ============================================
   20. BREADCRUMBS
   ============================================ */

.breadcrumbs {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    padding: var(--spacing);
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: var(--spacing);
    font-size: 0.9rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.breadcrumb-item a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-muted);
}

/* ============================================
   21. EMPTY STATE
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing);
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   22. RESPONSIVE DESIGN
   ============================================ */

/* Tablettes */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

/* Tablettes portrait */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .nav-list {
        flex-direction: column;
    }

    .nav-dropdown {
        position: static;
        box-shadow: none;
        display: none;
        background: var(--bg-secondary);
    }

    .nav-item:hover .nav-dropdown,
    .nav-item.active .nav-dropdown {
        display: block;
    }

    .table-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .modal {
        width: 95%;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --spacing: 0.75rem;
        --spacing-md: 1.25rem;
        --spacing-lg: 1.5rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .pagination {
        flex-wrap: wrap;
    }

    .page-link {
        min-width: 38px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* Impression */
@media print {
    .navigation,
    .header-actions,
    .btn,
    .form-section,
    .theme-toggle {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .table-container,
    .stat-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Touch devices */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .form-control,
    .page-link,
    .nav-link {
        min-height: 44px;
    }

    .btn:hover,
    .stat-card:hover {
        transform: none;
    }

    .nav-item:hover .nav-dropdown {
        display: none;
    }

    .nav-item.active .nav-dropdown {
        display: block;
    }
}

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