/* ===========================================
   C4-AI Customer Panel - Sidebar & Dashboard
   Modern Professional Design
   =========================================== */

/* Variables */
:root {
    /* Primary Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-50: #eef2ff;
    
    /* Dark Theme */
    --sidebar-bg: #0f172a;
    --sidebar-hover: #1e293b;
    --sidebar-active: rgba(99, 102, 241, 0.15);
    --sidebar-border: #1e293b;
    
    /* Light Content */
    --content-bg: #f8fafc;
    --card-bg: #ffffff;
    
    /* Text */
    --text-dark: #0f172a;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-light: #f8fafc;
    
    /* Borders */
    --border-color: #e2e8f0;
    --border-dark: #334155;
    
    /* Status */
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Font */
    --font-family: 'Vazirmatn', 'IRANSans', 'Segoe UI', Tahoma, sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--content-bg);
    -webkit-font-smoothing: antialiased;
}

/* ===========================================
   Dashboard Layout
   =========================================== */
.dashboard-layout {
    display: flex;
    min-height: 100vh;
    background: var(--content-bg);
}

/* ===========================================
   Sidebar
   =========================================== */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile */
    position: fixed;
    right: 0;
    top: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--border-dark);
    will-change: transform, width;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 72px;
}

/* Smooth animation for opening */
@media (max-width: 1024px) {
    .sidebar {
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
}

/* Sidebar Header */
.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-dark);
    flex-shrink: 0;
}

.sidebar-logo {
    width: 42px;
    height: 42px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.sidebar-logo svg {
    width: 22px;
    height: 22px;
    stroke: white;
    fill: none;
    stroke-width: 2;
}

.sidebar-brand {
    overflow: hidden;
    transition: all var(--transition-slow);
    white-space: nowrap;
}

.sidebar.collapsed .sidebar-brand {
    width: 0;
    opacity: 0;
}

.sidebar-brand h2 {
    color: var(--text-light);
    font-size: 18px;
    font-weight: 700;
    margin: 0;
}

.sidebar-brand span {
    color: var(--text-muted);
    font-size: 12px;
}

/* Toggle Button */
.sidebar-toggle {
    position: absolute;
    left: -14px;
    top: 26px;
    width: 28px;
    height: 28px;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.sidebar-toggle:hover {
    background: var(--sidebar-hover);
    color: var(--text-light);
    border-color: var(--primary);
}

.sidebar-toggle svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    transition: transform var(--transition-slow);
}

.sidebar.collapsed .sidebar-toggle svg {
    transform: rotate(180deg);
}

/* User Profile */
.sidebar-user {
    padding: 14px 16px;
    margin: 16px 12px;
    background: var(--sidebar-hover);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-base);
    cursor: pointer;
    flex-shrink: 0;
}

.sidebar-user:hover {
    background: rgba(99, 102, 241, 0.1);
}

.sidebar.collapsed .sidebar-user {
    padding: 10px;
    margin: 16px 8px;
    justify-content: center;
}

.user-avatar {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar svg {
    width: 20px;
    height: 20px;
    stroke: white;
    fill: none;
    stroke-width: 2;
}

.user-info {
    overflow: hidden;
    transition: all var(--transition-slow);
    flex: 1;
}

.sidebar.collapsed .user-info {
    width: 0;
    opacity: 0;
}

.user-name {
    color: var(--text-light);
    font-size: 14px;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    color: var(--text-muted);
    font-size: 12px;
}

.user-status {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar.collapsed .user-status {
    display: none;
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: 8px 0;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0; /* Important for flex scroll */
    -webkit-overflow-scrolling: touch;
}

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

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 4px;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-section-title {
    padding: 12px 20px 8px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-slow);
}

.sidebar.collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

/* Nav Item */
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    margin: 2px 10px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 10px;
    transition: all var(--transition-fast);
    position: relative;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.sidebar.collapsed .nav-item {
    padding: 11px;
    margin: 2px 8px;
    justify-content: center;
}

.nav-item:hover {
    background: var(--sidebar-hover);
    color: var(--text-light);
}

.nav-item:active {
    transform: scale(0.98);
}

.nav-item.active {
    background: var(--sidebar-active);
    color: var(--primary-light);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--primary);
    border-radius: 3px 0 0 3px;
}

/* Disabled nav item */
.nav-item.disabled {
    opacity: 0.4;
    pointer-events: none;
    position: relative;
}

.nav-item.disabled::after {
    content: '🔒';
    position: absolute;
    left: 12px;
    font-size: 12px;
}

.sidebar.collapsed .nav-item.disabled::after {
    display: none;
}

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

.nav-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.nav-text {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-slow);
}

.sidebar.collapsed .nav-text {
    width: 0;
    opacity: 0;
    overflow: hidden;
}

.nav-badge {
    background: var(--primary);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    margin-right: auto;
    transition: all var(--transition-slow);
}

.sidebar.collapsed .nav-badge {
    position: absolute;
    top: 4px;
    left: 4px;
    padding: 2px 5px;
    font-size: 9px;
    margin: 0;
}

/* Tooltip */
.nav-tooltip {
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%) translateX(-100%);
    background: var(--sidebar-bg);
    color: var(--text-light);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-dark);
    z-index: 1000;
}

.sidebar.collapsed .nav-item:hover .nav-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(-100%) translateX(-8px);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border-dark);
    flex-shrink: 0;
}

.logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 11px;
    background: transparent;
    border: 1px solid var(--border-dark);
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.logout-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.sidebar.collapsed .logout-btn span {
    display: none;
}

/* ===========================================
   Main Content
   =========================================== */
.main-content {
    flex: 1;
    margin-right: 260px;
    transition: margin var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed ~ .main-content {
    margin-right: 72px;
}

/* Top Header */
.top-header {
    background: var(--card-bg);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: var(--content-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.header-title h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
}

.header-title p {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 2px 0 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-btn {
    width: 40px;
    height: 40px;
    background: var(--content-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: var(--card-bg);
    color: var(--text-dark);
    border-color: var(--primary);
}

.header-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.notification-dot {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--card-bg);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 24px;
}

/* Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

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

/* ===========================================
   Stats Cards
   =========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.stat-icon.primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.stat-icon.success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
    line-height: 1.2;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 4px 0 0;
}

.stat-trend {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 8px;
    padding: 2px 8px;
    border-radius: 6px;
}

.stat-trend.up {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.stat-trend.down {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* ===========================================
   Cards
   =========================================== */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.card-title svg {
    width: 20px;
    height: 20px;
    stroke: var(--primary);
    fill: none;
    stroke-width: 2;
}

.card-body {
    padding: 24px;
}

/* ===========================================
   Sections
   =========================================== */
.section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.section.active {
    display: block;
}

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

/* ===========================================
   Buttons
   =========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-family);
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

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

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

.btn-success:hover {
    background: #16a34a;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

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

/* ===========================================
   Forms
   =========================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    font-family: var(--font-family);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-dark);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.form-help {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

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

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

th, td {
    padding: 14px 16px;
    text-align: right;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

th {
    background: var(--content-bg);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 13px;
}

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

/* ===========================================
   Badges
   =========================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.badge-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
}

/* ===========================================
   Alerts
   =========================================== */
.alert {
    padding: 14px 18px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    color: #166534;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #991b1b;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: #92400e;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: #1e40af;
}

/* ===========================================
   Modals
   =========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--content-bg);
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.modal-close svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ===========================================
   Toggle Switch
   =========================================== */
.toggle-switch {
    position: relative;
    width: 48px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border-color);
    border-radius: 26px;
    transition: var(--transition-base);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    right: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-base);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(-22px);
}

/* ===========================================
   Search Box
   =========================================== */
.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    font-family: var(--font-family);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===========================================
   Empty State
   =========================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    stroke: var(--border-color);
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
}

/* ===========================================
   Loading
   =========================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===========================================
   Responsive
   =========================================== */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(100%);
        width: 280px;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-right: 0 !important;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .sidebar-toggle {
        display: none;
    }
    
    /* منو در موبایل همیشه باز باشد */
    .sidebar.collapsed {
        width: 280px;
    }
    
    .sidebar.collapsed .sidebar-brand,
    .sidebar.collapsed .user-info,
    .sidebar.collapsed .nav-text,
    .sidebar.collapsed .nav-section-title {
        width: auto;
        opacity: 1;
    }
    
    .sidebar.collapsed .nav-item {
        padding: 11px 16px;
        margin: 2px 10px;
        justify-content: flex-start;
    }
    
    .sidebar.collapsed .logout-btn span {
        display: inline;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .top-header {
        padding: 12px 16px;
    }
    
    .content-area {
        padding: 16px;
    }
    
    .header-title h1 {
        font-size: 18px;
    }
    
    .header-title p {
        display: none;
    }
    
    .card-header {
        padding: 16px 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .card-body {
        padding: 20px;
    }
    
    th, td {
        padding: 10px 12px;
        font-size: 13px;
    }
    
    /* بهبود منو در موبایل */
    .sidebar {
        width: 85%;
        max-width: 300px;
    }
    
    .sidebar-header {
        padding: 16px;
    }
    
    .sidebar-user {
        margin: 12px 10px;
        padding: 12px;
    }
    
    .nav-item {
        padding: 12px 14px;
        margin: 2px 8px;
    }
    
    .nav-section-title {
        padding: 10px 14px 6px;
        font-size: 10px;
    }
    
    .sidebar-footer {
        padding: 10px;
    }
    
    .logout-btn {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .header-actions {
        gap: 8px;
    }
    
    .header-btn {
        width: 36px;
        height: 36px;
    }
    
    .btn {
        padding: 8px 14px;
        font-size: 13px;
    }
}

/* Version Badge */
.version-badge {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    padding: 8px 0;
    margin-top: 8px;
    border-top: 1px solid var(--sidebar-border);
    opacity: 0.7;
}

.sidebar.collapsed .version-badge {
    font-size: 9px;
    padding: 4px 0;
}