/* ========================================
   VARIABLES CSS & CONFIGURATION
   ======================================== */
:root {
    /* Palette de couleurs moderne */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    
    /* Couleurs neutres */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Système */
    --bg-body: #f9fafb;
    --bg-card: #ffffff;
    --border: #e5e7eb;
    --text: #111827;
    --text-muted: #6b7280;
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Rayons de bordure */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Ombres */
    --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);
}

/* ========================================
   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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========================================
   LAYOUT PRINCIPAL
   ======================================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Navigation latérale */
.sidebar {
    width: 260px;
    background: var(--gray-900);
    color: white;
    padding: var(--spacing-lg);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-700);
}

.sidebar-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sidebar-logo svg {
    width: 28px;
    height: 28px;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav-item {
    margin-bottom: var(--spacing-xs);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--gray-300);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    font-size: 0.95rem;
}

.sidebar-nav-link:hover {
    background: var(--gray-800);
    color: white;
}

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

.sidebar-nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-800);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.sidebar-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-email {
    font-size: 0.8rem;
    color: var(--gray-400);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Contenu principal */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: var(--spacing-xl);
    max-width: 100%;
}

/* Header de page */
.page-header {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}

.page-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* ========================================
   BOUTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    text-align: center;
    line-height: 1.5;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.05rem;
}

.btn svg {
    width: 18px;
    height: 18px;
}

/* Groupe de boutons */
.btn-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ========================================
   CARTES
   ======================================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

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

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--gray-50);
}

/* ========================================
   TABLEAUX
   ======================================== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    font-size: 0.925rem;
}

.table thead {
    background: var(--gray-50);
    border-bottom: 2px solid var(--border);
}

.table th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.table tbody tr {
    transition: background 0.15s;
}

.table tbody tr:hover {
    background: var(--gray-50);
}

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

.table-actions {
    text-align: right;
    width: 120px;
}

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

.action-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    text-decoration: none;
    border: 1px solid transparent;
}

.action-icon svg {
    width: 18px;
    height: 18px;
}

.action-icon.edit {
    color: var(--primary);
    background: var(--primary-light);
}

.action-icon.edit:hover {
    background: var(--primary);
    color: white;
}

.action-icon.delete {
    color: var(--danger);
    background: #fee2e2;
}

.action-icon.delete:hover {
    background: var(--danger);
    color: white;
}

.action-icon.view {
    color: var(--info);
    background: #cffafe;
}

.action-icon.view:hover {
    background: var(--info);
    color: white;
}

/* Badge dans les tableaux */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    white-space: nowrap;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* ========================================
   FORMULAIRES
   ======================================== */
.form-row {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.925rem;
}

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

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.2s;
    background: white;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

input:disabled,
select:disabled,
textarea:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

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

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-help {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--danger);
}

/* Formulaire en grille */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

/* ========================================
   ALERTES
   ======================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    border-left: 4px solid;
}

.alert svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-color: var(--success);
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-color: var(--danger);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-color: var(--warning);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-color: var(--info);
}

/* ========================================
   TOOLBAR (barre d'outils)
   ======================================== */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ========================================
   STATS CARDS (cartes de statistiques)
   ======================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.stat-card-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-card-change {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

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

/* ========================================
   PAGINATION
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--gray-700);
    transition: all 0.2s;
}

.pagination-link:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

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

.pagination-link:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   MENU HAMBURGER (mobile)
   ======================================== */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1100;
    background: var(--gray-900);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Overlay pour mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* ========================================
   EMPTY STATE
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.empty-state-text {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   RESPONSIVE - TABLETTE
   ======================================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }
    
    .main-content {
        margin-left: 220px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
}

/* ========================================
   RESPONSIVE - MOBILE
   ======================================== */
@media (max-width: 768px) {
    /* Afficher le bouton hamburger */
    .mobile-menu-btn {
        display: flex;
    }
    
    /* Masquer la sidebar par défaut */
    .sidebar {
        transform: translateX(-100%);
    }
    
    /* Afficher la sidebar quand active */
    .sidebar.active {
        transform: translateX(0);
    }
    
    /* Afficher l'overlay quand sidebar active */
    .sidebar-overlay.active {
        display: block;
    }
    
    /* Contenu principal en pleine largeur */
    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
        padding-top: 80px; /* Espace pour le bouton hamburger */
    }
    
    /* Ajuster le header de page */
    .page-header {
        padding: var(--spacing-md);
        flex-direction: column;
        align-items: flex-start;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    /* Tableaux scrollables */
    .table-wrapper {
        margin: 0 calc(-1 * var(--spacing-md));
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.625rem 0.75rem;
    }
    
    /* Boutons en pleine largeur */
    .btn-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Toolbar en colonne */
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .toolbar-left,
    .toolbar-right {
        width: 100%;
        flex-direction: column;
    }
    
    /* Grille de stats en 1 colonne */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    /* Formulaires */
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    /* Cartes */
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
}

/* ========================================
   IMPRESSION
   ======================================== */
@media print {
    .sidebar,
    .mobile-menu-btn,
    .toolbar,
    .btn,
    .action-icon {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border);
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* ========================================
   UTILITAIRES
   ======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }