/**
 * MikroTik Platform - Modern Minimal Design
 * Clean, professional, intuitive interface
 */

/* ============================================
   CSS Variables - Minimal palette
   ============================================ */
:root {
    /* Primary palette - Single accent color */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;

    /* Neutrals */
    --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;

    /* Semantic */
    --success: #059669;
    --success-light: #ecfdf5;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --danger: #dc2626;
    --danger-light: #fef2f2;

    /* Theme */
    --bg-body: var(--gray-50);
    --bg-card: #ffffff;
    --bg-sidebar: var(--gray-900);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-400);
    --border-color: var(--gray-200);

    /* Sidebar */
    --sidebar-width: 240px;
    --sidebar-collapsed: 72px;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark theme */
[data-theme="dark"] {
    --bg-body: var(--gray-900);
    --bg-card: var(--gray-800);
    --bg-sidebar: #0a0a0a;
    --text-primary: var(--gray-100);
    --text-secondary: var(--gray-400);
    --text-muted: var(--gray-500);
    --border-color: var(--gray-700);
    --primary-light: rgba(37, 99, 235, 0.1);
    --success-light: rgba(5, 150, 105, 0.1);
    --warning-light: rgba(217, 119, 6, 0.1);
    --danger-light: rgba(220, 38, 38, 0.1);
}

/* ============================================
   Reset
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

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

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

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

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.page-content {
    flex: 1;
    padding: var(--space-6);
    max-width: 1440px;
    width: 100%;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    z-index: 100;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-header {
    padding: var(--space-5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logo {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: -0.025em;
}

.sidebar-version {
    font-size: 0.6875rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-3) 0;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    margin: 1px var(--space-2);
    border-radius: var(--radius-md);
    color: var(--gray-400);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.theme-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    background: rgba(255, 255, 255, 0.06);
    border: none;
    color: var(--gray-400);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* ============================================
   Topbar
   ============================================ */
.topbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    font-size: 1.125rem;
    font-weight: 600;
    flex: 1;
    letter-spacing: -0.025em;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
}

.menu-toggle:hover {
    background: var(--gray-100);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.card-header h2,
.card-header h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--border-color);
    background: var(--gray-50);
}

[data-theme="dark"] .card-footer {
    background: rgba(0, 0, 0, 0.2);
}

/* ============================================
   Stats Cards
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    transition: all var(--transition);
}

.stat-card.clickable {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.stat-card.clickable:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.stat-icon svg {
    width: 20px;
    height: 20px;
}

.stat-icon.blue {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-icon.green {
    background: var(--success-light);
    color: var(--success);
}

.stat-icon.orange {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-icon.red {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-icon.gray {
    background: var(--gray-100);
    color: var(--gray-600);
}

[data-theme="dark"] .stat-icon.gray {
    background: var(--gray-700);
    color: var(--gray-400);
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-1);
}

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

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn svg {
    width: 16px;
    height: 16px;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-success:hover:not(:disabled) {
    background: #047857;
}

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

.btn-warning:hover:not(:disabled) {
    background: #b45309;
}

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

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
}

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

.btn-outline:hover:not(:disabled) {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

[data-theme="dark"] .btn-outline:hover:not(:disabled) {
    background: var(--gray-700);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-ghost:hover:not(:disabled) {
    background: var(--gray-700);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8125rem;
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--gray-50);
}

[data-theme="dark"] .table th {
    background: rgba(0, 0, 0, 0.2);
}

.table tbody tr {
    transition: background var(--transition);
}

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

[data-theme="dark"] .table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.table-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.875rem;
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert-success {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid currentColor;
    border-color: rgba(5, 150, 105, 0.2);
}

.alert-error {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid currentColor;
    border-color: rgba(220, 38, 38, 0.2);
}

.alert-warning {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid currentColor;
    border-color: rgba(217, 119, 6, 0.2);
}

.alert-info {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid currentColor;
    border-color: rgba(37, 99, 235, 0.2);
}

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-radius: 100px;
}

.badge-success,
.badge-active,
.badge-available,
.badge-configure {
    background: var(--success-light);
    color: var(--success);
}

.badge-info,
.badge-used,
.badge-deployed {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-warning,
.badge-pending,
.badge-nouveau {
    background: var(--warning-light);
    color: var(--warning);
}

.badge-danger,
.badge-expired,
.badge-failed,
.badge-inactive,
.badge-inactif {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-secondary,
.badge-cancelled {
    background: var(--gray-100);
    color: var(--gray-600);
}

[data-theme="dark"] .badge-secondary,
[data-theme="dark"] .badge-cancelled {
    background: var(--gray-700);
    color: var(--gray-400);
}

/* ============================================
   Section
   ============================================ */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* ============================================
   Quick Actions
   ============================================ */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-3);
}

.quick-action {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--gray-50);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.quick-action:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

[data-theme="dark"] .quick-action {
    background: var(--gray-800);
}

.quick-action-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    color: var(--primary);
}

.quick-action:hover .quick-action-icon {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.quick-action-icon svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Dashboard Grid
   ============================================ */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}

/* ============================================
   Recent Items List
   ============================================ */
.list-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition);
}

.list-item:hover {
    background: var(--gray-50);
}

[data-theme="dark"] .list-item:hover {
    background: var(--gray-700);
}

.list-item-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-light);
    color: var(--success);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

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

.list-item-content {
    flex: 1;
    min-width: 0;
}

.list-item-title {
    font-weight: 500;
    font-size: 0.875rem;
}

.list-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.list-item-meta code {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.6875rem;
    background: var(--gray-100);
    padding: 1px 4px;
    border-radius: 3px;
}

[data-theme="dark"] .list-item-meta code {
    background: var(--gray-700);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-6);
    color: var(--text-muted);
}

.empty-state-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    opacity: 0.5;
}

.empty-state-title {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

/* ============================================
   Auth Page
   ============================================ */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-6);
    background: var(--gray-100);
}

[data-theme="dark"] .auth-page {
    background: var(--gray-900);
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.auth-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    margin-bottom: var(--space-1);
}

.auth-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.auth-footer {
    text-align: center;
    color: var(--text-muted);
    margin-top: var(--space-6);
    font-size: 0.75rem;
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-top: var(--space-5);
}

.pagination-link {
    min-width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all var(--transition);
}

.pagination-link:hover {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

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

.pagination-ellipsis {
    min-width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    letter-spacing: 2px;
}

.pagination-info {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* ============================================
   Code Editor
   ============================================ */
.code-editor {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    min-height: 300px;
    background: var(--gray-900);
    color: #e5e7eb;
    border: none;
    padding: var(--space-4);
    border-radius: var(--radius-md);
}

/* ============================================
   Tabs
   ============================================ */
.tabs {
    display: flex;
    gap: var(--space-1);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--space-5);
}

.tab {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: all var(--transition);
}

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

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

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--shadow-md);
}

.modal-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1rem;
    font-weight: 600;
}

.modal-body {
    padding: var(--space-5);
}

.modal-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

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

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

.font-mono { font-family: 'SF Mono', Monaco, monospace; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }

.d-flex { display: flex; }
.d-grid { display: grid; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

.w-full { width: 100%; }

.hidden { display: none; }
.visible { visibility: visible; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 250ms ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        transition: all 250ms ease;
    }

    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }

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

@media (max-width: 768px) {
    .page-content {
        padding: var(--space-4);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .topbar-user .user-name {
        display: none;
    }

    .table th,
    .table td {
        padding: var(--space-2) var(--space-3);
        font-size: 0.8125rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Nav Groups & Submenus (Mikhmon style)
   ============================================ */
.nav-section {
    padding: var(--space-4) var(--space-4) var(--space-2);
}

.nav-section-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
}

/* Mikhmon site context badge in sidebar */
.mk-site-ctx {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 12px;
    margin: 0 8px 4px;
    border-radius: var(--radius-md, 8px);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.15);
}
.mk-site-ctx-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    color: var(--primary, #2563eb);
}
.mk-site-ctx-name {
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.mk-site-ctx-back {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    flex-shrink: 0;
    color: var(--text-muted, #6b7280);
    transition: all 0.15s;
}
.mk-site-ctx-back:hover {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger, #dc2626);
}

.nav-group {
    position: relative;
}

.nav-toggle {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-arrow {
    margin-left: auto;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.nav-arrow svg {
    width: 14px;
    height: 14px;
}

.nav-group.open > .nav-toggle .nav-arrow {
    transform: rotate(90deg);
}

.nav-submenu {
    display: none;
    padding-left: 0;
    overflow: hidden;
}

.nav-group.open > .nav-submenu {
    display: block;
}

.nav-link.sub {
    padding-left: calc(var(--space-4) + 20px);
    font-size: 0.8125rem;
}

.nav-link.sub .nav-icon {
    width: 16px;
    height: 16px;
}

.nav-link.sub .nav-icon svg {
    width: 14px;
    height: 14px;
}

/* Nested submenus */
.nav-submenu .nav-group .nav-submenu {
    padding-left: var(--space-3);
}

.nav-submenu .nav-group .nav-link.sub {
    padding-left: calc(var(--space-4) + 36px);
}

.nav-submenu .nav-submenu .nav-link.sub {
    padding-left: calc(var(--space-4) + 48px);
    font-size: 0.75rem;
}

/* Active state for sub items */
.nav-link.sub.active {
    background: rgba(37, 99, 235, 0.2);
    color: #fff;
}

/* Scrollable sidebar nav */
.sidebar-nav {
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}

/* ============================================
   Print
   ============================================ */
@media print {
    .sidebar,
    .topbar,
    .btn,
    .pagination {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
    }

    .page-content {
        padding: 0;
    }

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