/* =============================================================================
   ColdChain Pro - Professional Cold Chain Monitoring System
   Modern, Responsive CSS Design with Performance Optimizations
   Version: 2.0 | Zero-Lag, Butter-Smooth Animations
   ============================================================================= */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Color Palette */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #3b82f6;
    
    /* Status Colors */
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --danger-red: #ef4444;
    --info-blue: #06b6d4;
    
    /* Neutral Colors */
    --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;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --bg-dark: var(--gray-900);
    
    /* Text Colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-500);
    --text-white: #ffffff;
    
    /* Border and Shadow */
    --border-color: var(--gray-200);
    --border-radius: 12px;
    --border-radius-sm: 6px;
    --border-radius-lg: 16px;
    --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);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Transitions - Hardware Accelerated */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --header-height: 80px;
}

/* Import Professional Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Performance Optimizations */
* {
    /* Hardware acceleration for smooth animations */
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Global Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Prevent layout shifts */
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: var(--text-white);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid var(--text-white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.loading-content p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    transition: transform var(--transition-normal), width var(--transition-normal);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    /* Fix scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: var(--gray-400) var(--gray-100);
}

/* Custom scrollbar for webkit browsers */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--gray-100);
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .connection-text {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--spacing-md);
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0; /* Prevent header from shrinking */
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-blue);
}

.logo i {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.logo-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.nav-menu {
    list-style: none;
    padding: var(--spacing-lg);
    flex: 1; /* Allow menu to take available space */
    overflow-y: auto; /* Scroll within menu if needed */
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    font-weight: 500;
    cursor: pointer;
}

.nav-link i {
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.nav-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active .nav-link {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.nav-link i {
    font-size: var(--font-size-lg);
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
    flex-shrink: 0; /* Prevent footer from shrinking */
    margin-top: auto; /* Push to bottom */
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.connection-status i {
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

.connection-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.connection-status.connected i {
    color: var(--success-green);
}

.connection-status.disconnected i {
    color: var(--danger-red);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background-color: var(--bg-secondary);
    transition: margin-left var(--transition-normal);
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Top Header */
.top-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-2xl);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-left h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.breadcrumb {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

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

.container-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.container-id {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    background: var(--success-green);
    color: var(--text-white);
}

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

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
    background: var(--primary-blue-dark);
    border-color: var(--primary-blue-dark);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--text-secondary);
    border-color: var(--gray-200);
}

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-icon {
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
}

/* Page Management */
.page {
    display: none;
    padding: var(--spacing-2xl);
    min-height: calc(100vh - var(--header-height));
}

.page.active {
    display: block;
}

/* Grid Layouts */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1600px;
    margin: 0 auto;
}

.analytics-grid,
.alerts-grid,
.tracking-grid,
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1600px;
    margin: 0 auto;
}

/* Card Styles */
.card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
    position: relative;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

.card-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-content {
    padding: var(--spacing-xl);
}

/* Status Overview */
.status-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.status-indicator {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-green);
    color: var(--text-white);
    font-size: var(--font-size-lg);
}

.status-info {
    flex: 1;
}

.status-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.status-value {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

/* Current Readings */
.readings-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.reading-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.reading-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.reading-item.temperature .reading-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-red);
}

.reading-item.humidity .reading-icon {
    background: rgba(6, 182, 212, 0.1);
    color: var(--info-blue);
}

.reading-info {
    flex: 1;
}

.reading-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.reading-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.reading-trend {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Shelf Life Display */
.shelf-life-display {
    text-align: center;
}

.rsl-main {
    margin-bottom: var(--spacing-sm);
}

.rsl-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-blue);
    display: inline-block;
}

.rsl-unit {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-left: var(--spacing-sm);
}

.rsl-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.confidence-badge {
    background: linear-gradient(135deg, var(--success-green), #059669);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.confidence-badge i {
    font-size: var(--font-size-sm);
}

.rsl-progress {
    margin-bottom: var(--spacing-xl);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--gray-200);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-green), var(--primary-blue));
    border-radius: 6px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* ML Model Information */
.ml-model-info {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border: 1px solid #bae6fd;
}

.model-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.model-detail:not(:last-child) {
    border-bottom: 1px solid #e0f2fe;
}

.model-detail i {
    color: var(--primary-blue);
    width: 24px;
    text-align: center;
    font-size: var(--font-size-base);
}

.model-detail strong {
    color: var(--primary-blue);
    margin-right: var(--spacing-xs);
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.kpi-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.kpi-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-blue);
    color: var(--text-white);
}

.kpi-info {
    flex: 1;
}

.kpi-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.kpi-value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

/* Chart Containers */
.chart-container {
    grid-column: span 2;
}

.chart-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.chart-controls .btn.active {
    background: var(--primary-blue);
    color: var(--text-white);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.form-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

/* Alert Styles */
.alert-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.stat-item.critical {
    border-left: 4px solid var(--danger-red);
}

.stat-item.warning {
    border-left: 4px solid var(--warning-yellow);
}

.stat-item.resolved {
    border-left: 4px solid var(--success-green);
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.no-alerts {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.no-alerts i {
    font-size: var(--font-size-3xl);
    color: var(--success-green);
    margin-bottom: var(--spacing-md);
}

/* Maps */
.map-full {
    height: 400px;
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
}

#map, #trackingMap {
    height: 400px;
    width: 100%;
    border-radius: var(--border-radius);
}

/* Location Details */
.location-details {
    display: grid;
    gap: var(--spacing-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.detail-row .label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.detail-row .value {
    font-weight: 500;
    color: var(--text-primary);
}

/* System Info */
.info-grid {
    display: grid;
    gap: var(--spacing-md);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.info-item .label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.info-item .value {
    font-weight: 500;
    color: var(--text-primary);
}

/* Tab Navigation */
.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    transition: all var(--transition-fast);
}

.tab-btn.active {
    background: var(--primary-blue);
    color: var(--text-white);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 10000;
    pointer-events: none;
}

.toast {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    max-width: 400px;
    pointer-events: auto;
    border-left: 4px solid var(--primary-blue);
    animation: slideIn 0.3s ease-out;
}

.toast.success {
    border-left-color: var(--success-green);
}

.toast.error {
    border-left-color: var(--danger-red);
}

.toast.warning {
    border-left-color: var(--warning-yellow);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Trend Analysis */
.trend-items {
    display: grid;
    gap: var(--spacing-md);
}

.trend-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
}

.trend-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.trend-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .dashboard-grid,
    .analytics-grid,
    .alerts-grid,
    .tracking-grid,
    .settings-grid {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
    }
    
    .chart-container {
        grid-column: span 1;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .top-header {
        padding: 0 var(--spacing-lg);
        flex-direction: column;
        height: auto;
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
        margin-top: var(--spacing-md);
    }
    
    .container-info {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .page {
        padding: var(--spacing-lg);
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .top-header,
    .btn,
    .chart-controls {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav-link:focus,
.form-input:focus,
.form-select:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Animation for cards - with stagger effect */
.card {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    will-change: opacity, transform;
}

.card:nth-child(1) { animation-delay: 0ms; }
.card:nth-child(2) { animation-delay: 50ms; }
.card:nth-child(3) { animation-delay: 100ms; }
.card:nth-child(4) { animation-delay: 150ms; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* =============================================================================
   ENHANCED COMPONENTS FOR INSIGHTS & ANALYTICS
   ============================================================================= */

/* Page Transition */
.page {
    opacity: 0;
    transition: opacity var(--transition-normal);
    will-change: opacity;
}

.page.active {
    opacity: 1;
}

/* Insights Panel */
.insights-panel {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    color: var(--text-white);
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    animation: slideInRight 0.5s var(--transition-spring);
}

.insights-panel h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.insight-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: calc(var(--border-radius) / 1.5);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    border-left: 4px solid transparent;
}

.insight-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.insight-item.success { border-left-color: var(--success-green); }
.insight-item.warning { border-left-color: var(--warning-yellow); }
.insight-item.critical { border-left-color: var(--danger-red); }
.insight-item.info { border-left-color: var(--info-blue); }

.insight-item i {
    font-size: var(--font-size-2xl);
    min-width: 40px;
    opacity: 0.9;
}

.insight-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-lg);
}

.insight-item p {
    opacity: 0.9;
    line-height: 1.5;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--info-blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-spring);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: var(--text-white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

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

.stat-change.up { color: var(--success-green); }
.stat-change.down { color: var(--danger-red); }
.stat-change.success { color: var(--success-green); }
.stat-change.warning { color: var(--warning-yellow); }
.stat-change.info { color: var(--info-blue); }

/* Analytics Insights */
.analytics-insights {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    margin-bottom: var(--spacing-xl);
}

.analytics-insights h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.analytics-insights h4 i {
    color: var(--primary-blue);
}

.analytics-insights ul {
    list-style: none;
}

.analytics-insights li {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: calc(var(--border-radius) / 2);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.analytics-insights li:hover {
    background: var(--bg-tertiary);
    transform: translateX(5px);
}

.analytics-insights li i {
    margin-top: 2px;
    min-width: 20px;
}

.text-success { color: var(--success-green); }
.text-warning { color: var(--warning-yellow); }
.text-danger { color: var(--danger-red); }
.text-info { color: var(--info-blue); }
.text-primary { color: var(--primary-blue); }

/* Alert Summary Grid */
.alert-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
}

.summary-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.summary-card i {
    font-size: var(--font-size-2xl);
}

.summary-card.critical { border-left: 4px solid var(--danger-red); }
.summary-card.critical i { color: var(--danger-red); }
.summary-card.warning { border-left: 4px solid var(--warning-yellow); }
.summary-card.warning i { color: var(--warning-yellow); }
.summary-card.resolved { border-left: 4px solid var(--success-green); }
.summary-card.resolved i { color: var(--success-green); }
.summary-card.total { border-left: 4px solid var(--info-blue); }
.summary-card.total i { color: var(--info-blue); }

.summary-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
}

.summary-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.alert-insights-text {
    background: linear-gradient(135deg, var(--info-blue), var(--primary-blue));
    color: var(--text-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.alert-insights-text i {
    font-size: var(--font-size-2xl);
}

/* Journey Timeline */
.timeline-item {
    position: relative;
    padding-left: 50px;
    padding-bottom: var(--spacing-xl);
    border-left: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.timeline-item:last-child {
    border-left-color: transparent;
    padding-bottom: 0;
}

.timeline-item.active {
    border-left-color: var(--primary-blue);
}

.timeline-marker {
    position: absolute;
    left: -10px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.timeline-item.active .timeline-marker {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
    animation: pulse 2s infinite;
}

.timeline-marker i {
    font-size: 10px;
    color: var(--text-secondary);
}

.timeline-item.active .timeline-marker i {
    color: var(--text-white);
}

.timeline-content {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: calc(var(--border-radius) / 2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.timeline-time {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.timeline-temp {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.timeline-location {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
}

/* System Info Display */
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row span {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.info-row strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(37, 99, 235, 0);
    }
}

/* Slide In Animation */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Smooth Scroll for Charts */
.chart-container {
    scroll-behavior: smooth;
}

/* Last update styling */
.last-update {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}