/**
 * T8 Platform - Styles
 * Basé sur le design system T8 Chat
 */

/* === Variables CSS - Thème clair (défaut) === */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-dark: #1d4ed8;
    --success-color: #22c55e;
    --success-hover: #16a34a;
    --warning-color: #f59e0b;
    --warning-hover: #d97706;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --info-color: #06b6d4;
    
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --text-dark: #f3f4f6;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --bg-input: #ffffff;
    --bg-card: #ffffff;
    
    --border-color: #d1d5db;
    --border-light: #e5e7eb;
    
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    --radius: 0.5rem;
    --radius-lg: 1rem;
    --radius-sm: 0.25rem;
    
    --accent-color: #ffcc00;
    
    --sidebar-width: 260px;
    --header-height: 60px;
}

/* === Thème sombre === */
[data-theme="dark"] {
    --text-color: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dark: #1f2937;
    
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #374151;
    --bg-input: #1f2937;
    --bg-card: #1f2937;
    
    --border-color: #4b5563;
    --border-light: #374151;
    
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* Header reste sombre pour le contraste */
.header {
    background: #1f2937;
    color: #f3f4f6;
}

/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    font-size: 15px;
    color: var(--text-color);
    background-color: var(--bg-secondary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    min-height: 100vh;
}

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

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

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 1rem 0;
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
    margin: 0 0 1rem 0;
}

/* === Header === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    background: #1f2937;
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
    text-decoration: none;
}

.header-logo:hover {
    text-decoration: none;
}

.header-logo img {
    height: 40px;
}

.header-logo svg {
    color: white;
}

.header-title {
    color: var(--accent-color);
    font-style: italic;
    font-size: 16px;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* === App Switcher dans le header === */
.header .app-switcher-btn {
    background: #374151;
    border-color: #4b5563;
    color: #f3f4f6;
    width: 36px;
    height: 36px;
}

.header .app-switcher-btn:hover {
    background: #4b5563;
}

/* === Theme Toggle === */
.theme-toggle {
    position: relative;
    width: 36px;
    height: 36px;
}

.theme-icon-dark,
.theme-icon-light {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.1rem;
    transition: opacity 0.2s, transform 0.3s;
}

/* Thème clair (défaut) : montrer lune (pour passer en sombre) */
.theme-icon-light {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg);
}

.theme-icon-dark {
    opacity: 1;
}

/* Thème sombre : montrer soleil (pour passer en clair) */
[data-theme="dark"] .theme-icon-dark {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg);
}

[data-theme="dark"] .theme-icon-light {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

/* === Sidebar === */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--bg-secondary);
    color: var(--text-color);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem 0;
    z-index: 900;
}

.sidebar-section {
    padding: 0;
    margin-bottom: 0.6rem;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1.25rem;
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    white-space: nowrap;
    opacity: 0.7;
}

.sidebar-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-light);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.sidebar-link:hover {
    background: var(--bg-tertiary);
    text-decoration: none;
}

.sidebar-link.active {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.sidebar-icon {
    font-size: 1.1rem;
    width: 1.5rem;
    text-align: center;
}

.sidebar-tool-logo {
    width: 18px;
    height: 18px;
    object-fit: contain;
    margin-right: 0.4rem;
    vertical-align: middle;
}

.sidebar-tools {
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
    padding-top: 1rem;
}

/* === Tooltips sidebar (via JS, ajouté au body pour éviter overflow clip) === */
.sidebar-tooltip {
    position: fixed;
    background: var(--bg-card, #ffffff);
    color: var(--text-color, #1f2937);
    border: 1px solid var(--border-color, #d1d5db);
    border-radius: 8px;
    padding: 0.6rem 0.85rem;
    font-size: 0.8rem;
    line-height: 1.4;
    width: 240px;
    white-space: normal;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    z-index: 1100;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
}
.sidebar-tooltip.visible {
    opacity: 1;
}

/* === Liens utilisateur (toujours visibles) === */
.sidebar-user-links {
    padding: 0.25rem 0 0.4rem;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 0.25rem;
}

.sidebar-user-links .sidebar-link {
    padding: 0.1rem 1.25rem;
    font-size: 0.8rem;
    line-height: 1.5;
}

/* === Zones dépliables (ADMIN) === */
.sidebar-zone {
    margin-bottom: 0.15rem;
}

.sidebar-zone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.55rem 1rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #ffffff;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    transition: background 0.15s;
    user-select: none;
    border-left: 3px solid #60a5fa;
}

.sidebar-zone:nth-child(2) .sidebar-zone-header {
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
    border-left-color: #a78bfa;
}

.sidebar-zone-header:hover {
    filter: brightness(1.1);
}

.sidebar-zone-arrow {
    font-size: 0.85rem;
    transition: transform 0.2s;
    color: rgba(255, 255, 255, 0.8);
    transform: rotate(180deg);
}

.sidebar-zone-header.collapsed .sidebar-zone-arrow {
    transform: rotate(0deg);
}

.sidebar-zone-content {
    max-height: 0;
    overflow: hidden;
}

.sidebar-zone-content.open {
    max-height: 1000px;
}

/* Transitions activées uniquement après le chargement */
.sidebar-ready .sidebar-zone-content {
    transition: max-height 0.25s ease-out;
}

.sidebar-ready .sidebar-zone-content.open {
    transition: max-height 0.35s ease-in;
}

.sidebar-zone-content .sidebar-section {
    padding: 0;
    margin-bottom: 0.35rem;
}

.sidebar-zone-content .sidebar-section:first-child {
    padding-top: 0.05rem;
}

.sidebar-zone-content .sidebar-section:last-child {
    margin-bottom: 0.15rem;
}

.sidebar-zone-content .sidebar-title {
    padding: 0.2rem 1.25rem 0.1rem;
    font-size: 0.7rem;
    margin-bottom: 0;
}

.sidebar-zone-content .sidebar-link {
    padding: 0.1rem 1.25rem;
    font-size: 0.8rem;
    line-height: 1.5;
}

/* Zone USER : liens directs sans sous-sections */
.sidebar-zone-content > .sidebar-link {
    padding: 0.1rem 1.25rem;
    font-size: 0.8rem;
    line-height: 1.5;
}

/* === Page loader === */
.page-loader {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: var(--sidebar-width);
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    opacity: 0.7;
    z-index: 800;
    align-items: center;
    justify-content: center;
}

.page-loader.visible {
    display: flex;
}

.page-loader-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: page-spin 0.6s linear infinite;
}

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

@media (max-width: 768px) {
    .page-loader {
        left: 0;
    }
}

/* === Main Content === */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 2rem;
    min-height: calc(100vh - var(--header-height));
}

.main-content.no-sidebar {
    margin-left: 0;
}

/* === Cards === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    /* Default padding handled by .card */
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

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

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

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

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

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

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
}

.btn-icon {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
}

.btn-icon:hover {
    background: var(--border-color);
    border-color: var(--text-muted);
}

/* === Forms === */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-label .required {
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: var(--text-color);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
    opacity: 0.7;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

.form-text {
    display: block;
    margin-top: 0.375rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 200px;
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.1rem;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.form-check-label {
    cursor: pointer;
}

/* === Tables === */
.table-container,
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    /* Permet aux dropdowns de déborder */
    overflow-y: visible;
    position: relative;
}

.table-responsive {
    display: block;
    width: 100%;
}

.table-responsive .table {
    min-width: 600px;
}

/* Fix pour les dropdowns dans les tableaux */
.table-container .dropdown,
.table-responsive .dropdown {
    position: static;
}

.table-container .dropdown-menu,
.table-responsive .dropdown-menu {
    position: fixed;
    z-index: 1050;
}

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

th, td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: var(--bg-tertiary);
    font-weight: 600;
    white-space: nowrap;
}

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

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

/* === Badges === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    background: var(--bg-tertiary);
    color: var(--text-color);
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.badge-info {
    background: rgba(6, 182, 212, 0.2);
    color: #22d3ee;
}

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

/* === Alerts === */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.3);
    color: #166534;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.3);
    color: #991b1b;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.12);
    border-color: rgba(245, 158, 11, 0.3);
    color: #92400e;
}

.alert-info {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.3);
    color: #1e40af;
}

[data-theme="dark"] .alert-success { color: #86efac; }
[data-theme="dark"] .alert-danger { color: #fca5a5; }
[data-theme="dark"] .alert-warning { color: #fcd34d; }
[data-theme="dark"] .alert-info { color: #93c5fd;
}

/* === Dropdown === */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    padding: 0.5rem;
    z-index: 1100;
    display: none;
    backdrop-filter: blur(10px);
}

.dropdown-menu.show {
    display: block;
    animation: dropdownFadeIn 0.15s ease-out;
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-menu-right {
    left: auto;
    right: 0;
}

.dropdown-header {
    padding: 0.5rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    color: var(--text-color);
    text-decoration: none;
    cursor: pointer;
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: all 0.15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background: var(--bg-tertiary);
    text-decoration: none;
}

.dropdown-item:active {
    background: var(--primary-color);
    color: white;
}

.dropdown-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.dropdown-item .text-muted {
    font-size: 0.8rem;
    margin-left: auto;
}

.dropdown-item.text-warning {
    color: var(--warning-color);
}

.dropdown-item.text-warning:hover {
    background: rgba(245, 158, 11, 0.15);
}

.dropdown-item.text-danger {
    color: var(--danger-color);
}

.dropdown-item.text-danger:hover {
    background: rgba(239, 68, 68, 0.15);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* Bouton menu contextuel */
.btn-icon-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-icon-menu:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-icon-menu:active {
    background: var(--bg-secondary);
}

/* === User Button === */
.btn-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-color);
    cursor: pointer;
}

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

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}
img.user-avatar {
    display: block;
    object-fit: contain;
    padding: 2px;
}

.user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-arrow {
    font-size: 0.6rem;
    opacity: 0.6;
}

/* === Notification === */
.notification-btn {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 18px;
    height: 18px;
    background: var(--danger-color);
    border-radius: 50%;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === Stats Cards === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

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

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.stat-change.positive {
    color: var(--success-color);
}

.stat-change.negative {
    color: var(--danger-color);
}

/* === Minimal Layout (Login, etc.) === */
.minimal-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.minimal-container {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.login-logo {
    display: block;
    max-width: 200px;
    margin: 0 auto 2rem;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.login-title {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* === Page Header === */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title {
    font-size: 1.5rem;
    margin: 0;
}

.page-subtitle {
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    font-size: 0.95rem;
    font-weight: normal;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

/* === Utilities === */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.text-warning { color: var(--warning-color); }
.text-primary { color: var(--primary-color); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.w-100 { width: 100%; }

/* === Two Columns Layout === */
.two-columns-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.two-columns-layout .column-main,
.two-columns-layout .column-side {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Variante avec colonne principale plus large */
.two-columns-layout.wide-main {
    grid-template-columns: 3fr 2fr;
}

/* Variante avec colonne latérale plus large */
.two-columns-layout.wide-side {
    grid-template-columns: 2fr 3fr;
}

/* === Bouton hamburger (masqué par défaut) === */
.btn-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 32px;
    height: 28px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    padding: 5px;
    margin-right: 0.75rem;
}

.btn-hamburger span {
    width: 100%;
    height: 3px;
    background: #ffffff;
    border-radius: 2px;
    transition: all 0.2s;
}

.btn-hamburger:active {
    background: rgba(255,255,255,0.2);
}

/* === Responsive === */
@media (max-width: 992px) {
    :root {
        --sidebar-width: 220px;
    }
    
    .sidebar {
        width: var(--sidebar-width);
    }
    
    .main-content {
        margin-left: var(--sidebar-width);
    }
    
    .desktop-only {
        display: none;
    }
    
    .two-columns-layout {
        grid-template-columns: 1fr;
    }
    
    .two-columns-layout.wide-main,
    .two-columns-layout.wide-side {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .btn-hamburger {
        display: flex;
    }
    
    .header-title {
        display: none;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: var(--header-height);
        width: 260px;
        height: calc(100vh - var(--header-height));
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
        box-shadow: 2px 0 10px rgba(0,0,0,0.3);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-zone-header {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    .sidebar-zone-content .sidebar-link {
        padding: 0.3rem 1rem;
        font-size: 0.85rem;
    }

    .sidebar-title {
        padding: 0.3rem 1rem 0.15rem;
        font-size: 0.6rem;
    }
    
    .sidebar-icon {
        font-size: 1rem;
        width: 1.25rem;
    }
    
    /* Overlay pour fermer le menu */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 998;
    }
    
    .sidebar.open + .sidebar-overlay,
    .sidebar-overlay.open {
        display: block;
    }
    
    /* Dashboard admin - grilles responsive */
    .dashboard-grid-2col {
        grid-template-columns: 1fr !important;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr !important;
    }
    
    /* Card header responsive */
    .card-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.75rem;
    }
    
    .card-header .btn {
        width: 100%;
    }
    
    /* Tables responsive */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .table-responsive .table,
    .table {
        min-width: 500px;
    }
    
    /* Graphiques responsive */
    .chart-with-legend {
        flex-direction: column !important;
        gap: 1rem !important;
    }
    
    .chart-with-legend > div:first-child {
        width: 140px !important;
        height: 140px !important;
        margin: 0 auto;
    }
    
    /* Navigation période responsive */
    .period-nav {
        flex-direction: column !important;
        gap: 0.75rem !important;
    }
    
    .period-nav > div,
    .period-nav > a {
        width: 100%;
        text-align: center;
    }
    
    .period-nav .btn {
        flex: 1;
        text-align: center;
    }
    
    .period-nav .d-flex {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .period-btns {
        width: 100%;
        justify-content: center;
        margin-top: 0.5rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch !important;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .form-row .form-group {
        min-width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr !important;
    }
}

.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.mb-0 { margin-bottom: 0; }
.btn-outline-primary { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: white; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.875rem; }