/**
 * Styles principaux de l'application
 */

/* ============================================================
   VARIABLES
============================================================ */
:root {
    /* Couleurs principales */
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #3498db;
    
    /* Couleurs de fond */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #2c3e50;
    
    /* Couleurs de texte */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-muted: #95a5a6;
    
    /* Bordures */
    --border-color: #dee2e6;
    --border-radius: 6px;
    
    /* Ombres */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
    
    /* Espacements */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Dimensions */
    --sidebar-width: 260px;
    --header-height: 70px;
}

/* ============================================================
   RESET & BASE
============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
}

img {
    max-width: 100%;
    height: auto;
}

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

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

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

.d-none { display: none; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

/* ============================================================
   HEADER
============================================================ */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: white;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 1000;
}

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

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background 0.3s ease;
}

.sidebar-toggle:hover {
    background: var(--bg-secondary);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.header-center {
    flex: 1;
    max-width: 600px;
    margin: 0 var(--spacing-lg);
}

.search-form {
    display: flex;
    gap: var(--spacing-sm);
}

.search-input {
    flex: 1;
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
}

.search-btn {
    padding: 0.625rem 1.25rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background 0.3s ease;
}

.search-btn:hover {
    background: #2980b9;
}

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

.user-menu {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background 0.3s ease;
}

.user-menu-toggle:hover {
    background: var(--bg-secondary);
}

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

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-sm);
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 250px;
    display: none;
    z-index: 1001;
}

.user-menu:hover .user-dropdown {
    display: block;
}

.user-info {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.user-dropdown a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    transition: background 0.3s ease;
}

.user-dropdown a:hover {
    background: var(--bg-secondary);
}

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

/* ============================================================
   SIDEBAR
============================================================ */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: white;
    box-shadow: var(--shadow-sm);
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 999;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-nav ul {
    list-style: none;
    padding: var(--spacing-md);
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

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

.nav-section {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-md) 0;
}

/* ============================================================
   MAIN CONTAINER
============================================================ */
.main-container {
    display: flex;
    margin-top: var(--header-height);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--header-height));
    transition: margin-left 0.3s ease;
}

.sidebar.collapsed ~ .main-content {
    margin-left: 0;
}

/* ============================================================
   CARDS
============================================================ */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

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

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

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

/* ============================================================
   BUTTONS
============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #2980b9;
    color: white;
}

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

.btn-success:hover {
    background: #27ae60;
    color: white;
}

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

.btn-danger:hover {
    background: #c0392b;
    color: white;
}

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

.btn-warning:hover {
    background: #e67e22;
    color: white;
}

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

.btn-info:hover {
    background: #2980b9;
    color: white;
}

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

.btn-outline:hover {
    background: var(--bg-secondary);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.btn-group {
    display: inline-flex;
    gap: 2px;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

/* ============================================================
   FORMS
============================================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-control-lg {
    padding: 0.875rem 1.25rem;
    font-size: 1.125rem;
}

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

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-check-label {
    cursor: pointer;
    margin: 0;
    font-weight: normal;
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* ============================================================
   TABLES
============================================================ */
.table-responsive {
    overflow-x: auto;
}

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

.table thead {
    background: var(--bg-secondary);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-primary);
}

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

.table-sm th,
.table-sm td {
    padding: var(--spacing-sm);
}

.table-bordered {
    border: 1px solid var(--border-color);
}

.table-bordered th,
.table-bordered td {
    border: 1px solid var(--border-color);
}

/* ============================================================
   BADGES
============================================================ */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

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

.badge-warning {
    background: var(--warning-color);
    color: white;
}

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

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

/* ============================================================
   ALERTS
============================================================ */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-dismissible {
    padding-right: 3rem;
}

.alert-close {
    position: absolute;
    top: 50%;
    right: var(--spacing-md);
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

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

.alert-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ============================================================
   MODALS
============================================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

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

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

/* ============================================================
   BREADCRUMB
============================================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

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

/* ============================================================
   PAGE HEADER
============================================================ */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    margin: 0;
    font-size: 1.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

/* ============================================================
   GRID
============================================================ */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacing-sm));
}

.col,
.col-md-1, .col-md-2, .col-md-3, .col-md-4,
.col-md-5, .col-md-6, .col-md-7, .col-md-8,
.col-md-9, .col-md-10, .col-md-11, .col-md-12 {
    padding: 0 var(--spacing-sm);
}

.col { flex: 1; }
.col-md-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
.col-md-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
.col-md-3 { flex: 0 0 25%; max-width: 25%; }
.col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-md-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
.col-md-6 { flex: 0 0 50%; max-width: 50%; }
.col-md-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
.col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-md-9 { flex: 0 0 75%; max-width: 75%; }
.col-md-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
.col-md-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
.col-md-12 { flex: 0 0 100%; max-width: 100%; }

/* ============================================================
   PROGRESS BAR
============================================================ */
.progress {
    height: 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    transition: width 0.3s ease;
}

/* ============================================================
   FOOTER
============================================================ */
.main-footer {
    background: white;
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.footer-content {
    color: var(--text-secondary);
    font-size: 0.875rem;
}