/**
 * Proxmox AI Dashboard - Professional Styles
 * Modern, responsive, and highly optimized design
 */

/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    /* Colors */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    
    /* 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;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 80px;
    --header-height: 70px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--gray-50);
    overflow-x: hidden;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    transition: width var(--transition-base), transform var(--transition-base);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
}

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

.sidebar-header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    min-height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
}

.logo i {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.sidebar.collapsed .logo span {
    display: none;
}

.toggle-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    white-space: nowrap;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-left-color: white;
    font-weight: 600;
}

.nav-item i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

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

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-400);
}

.status-dot.active {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
    animation: pulse 2s infinite;
}

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

.version-info {
    font-size: 0.75rem;
    opacity: 0.7;
    text-align: center;
}

.sidebar.collapsed .sidebar-footer span {
    display: none;
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
    background: var(--gray-50);
}

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

/* ============================================
   Header
   ============================================ */
.top-header {
    background: white;
    height: var(--header-height);
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-600);
    cursor: pointer;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

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

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    color: var(--gray-400);
}

.search-box input {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    width: 250px;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.header-btn {
    position: relative;
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.header-btn .badge {
    position: absolute;
    top: 6px;
    right: 6px;
    background: var(--danger);
    color: white;
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 10px;
    font-weight: 600;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.user-menu img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.user-menu span {
    font-weight: 500;
}

/* ============================================
   Page Container
   ============================================ */
.page-container {
    padding: var(--spacing-xl);
}

.page-content {
    display: none;
    animation: fadeIn var(--transition-base);
}

.page-content.active {
    display: block;
}

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

/* ============================================
   Stats 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: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.stat-icon.blue { background: linear-gradient(135deg, var(--primary), #5568d3); }
.stat-icon.green { background: linear-gradient(135deg, var(--success), #059669); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.stat-icon.orange { background: linear-gradient(135deg, var(--warning), #f97316); }

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.stat-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.stat-trend {
    font-size: 0.875rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.stat-trend.positive {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

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

/* ============================================
   Dashboard Grid
   ============================================ */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.dashboard-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-header h3 i {
    color: var(--primary);
}

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

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

/* ============================================
   Activity List
   ============================================ */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.activity-icon.success { background: var(--success); }
.activity-icon.info { background: var(--info); }
.activity-icon.warning { background: var(--warning); }
.activity-icon.danger { background: var(--danger); }

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 500;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ============================================
   Workflow Visualizer
   ============================================ */
.workflow-controls {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

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

.workflow-container {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.workflow-stats {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.workflow-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.workflow-stat-item .label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.workflow-stat-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* ============================================
   Nodes Grid
   ============================================ */
.nodes-toolbar {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-filter {
    display: flex;
    gap: var(--spacing-md);
    flex: 1;
    max-width: 600px;
}

.search-filter input,
.search-filter select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.search-filter input {
    flex: 1;
}

.search-filter select {
    min-width: 150px;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.node-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.node-card-header {
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.node-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.node-card-header h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    flex: 1;
}

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

.node-type {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
}

.node-id {
    font-size: 0.75rem;
    color: var(--gray-400);
    font-family: 'JetBrains Mono', monospace;
}

.node-card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-50);
    display: flex;
    gap: var(--spacing-sm);
}

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

.optimization-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.optimization-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.optimization-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.opt-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.opt-header i {
    font-size: 1.5rem;
    color: var(--primary);
}

.opt-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.opt-content {
    padding: var(--spacing-lg);
}

.metric-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.metric-row span:first-child {
    min-width: 120px;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--success), #059669);
    border-radius: var(--radius-lg);
    transition: width var(--transition-slow);
}

.progress.warning {
    background: linear-gradient(90deg, var(--warning), #f97316);
}

.metric-value {
    min-width: 50px;
    text-align: right;
    font-weight: 600;
    color: var(--gray-900);
}

.recommendations-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.recommendation {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid;
}

.recommendation.high {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: var(--danger);
}

.recommendation.medium {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning);
}

.recommendation.low {
    background: rgba(16, 185, 129, 0.1);
    border-left-color: var(--success);
}

.recommendation i {
    flex-shrink: 0;
    margin-top: 2px;
}

.optimization-details {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* ============================================
   Monitoring
   ============================================ */
.monitoring-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.monitor-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.status-badge {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

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

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

.gauge-container {
    position: relative;
    width: 150px;
    height: 150px;
    margin: var(--spacing-lg) auto;
}

.gauge-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.monitoring-timeline {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.timeline-controls {
    display: flex;
    gap: var(--spacing-xs);
}

.timeline-controls .btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--gray-300);
    background: white;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.timeline-controls .btn-sm:hover {
    background: var(--gray-50);
}

.timeline-controls .btn-sm.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ============================================
   Configuration
   ============================================ */
.config-container {
    max-width: 800px;
}

.config-section {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.config-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.config-section h3 i {
    color: var(--primary);
}

.config-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="number"] {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input:read-only {
    background: var(--gray-100);
    cursor: not-allowed;
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.config-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* ============================================
   Security
   ============================================ */
.security-overview {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.security-score {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.score-circle {
    position: relative;
    width: 200px;
    height: 200px;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-900);
}

.score-label {
    display: block;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

.security-checks {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
}

.security-checks h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.check-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.check-item.passed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

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

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

.security-recommendations {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
}

.security-recommendations h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.security-recommendations h3 i {
    color: var(--primary);
}

.recommendation-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 3px solid;
}

.recommendation-card.high-priority {
    background: rgba(239, 68, 68, 0.1);
    border-left-color: var(--danger);
}

.recommendation-card.medium-priority {
    background: rgba(245, 158, 11, 0.1);
    border-left-color: var(--warning);
}

.rec-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.recommendation-card p {
    margin-bottom: var(--spacing-md);
    color: var(--gray-700);
}

/* ============================================
   Export/Import
   ============================================ */
.export-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.export-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.file-upload {
    margin: var(--spacing-md) 0;
}

.file-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.export-history {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
}

.export-history h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.export-history h3 i {
    color: var(--primary);
}

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

.data-table thead {
    background: var(--gray-50);
}

.data-table th {
    text-align: left;
    padding: var(--spacing-md);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
    border-bottom: 2px solid var(--gray-200);
}

.data-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.875rem;
}

.data-table .badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--gray-100);
    color: var(--gray-700);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

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

.btn-success:hover {
    background: #059669;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--gray-600);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

/* ============================================
   Switch Toggle
   ============================================ */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-300);
    transition: var(--transition-fast);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
}

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

input:checked + .slider:before {
    transform: translateX(24px);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.toast {
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    min-width: 300px;
    opacity: 0;
    transform: translateX(400px);
    transition: all var(--transition-base);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

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

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--info); }

.toast-success i { color: var(--success); }
.toast-error i { color: var(--danger); }
.toast-warning i { color: var(--warning); }
.toast-info i { color: var(--info); }

.toast-close {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* ============================================
   Loading Overlay
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--spacing-lg);
    z-index: 10000;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    color: white;
    font-size: 1.125rem;
    font-weight: 500;
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: var(--spacing-xl);
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow: auto;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.modal-close:hover {
    color: var(--gray-900);
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .search-box {
        display: none;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .nodes-grid {
        grid-template-columns: 1fr;
    }
    
    .security-overview {
        grid-template-columns: 1fr;
    }
    
    .export-grid {
        grid-template-columns: 1fr;
    }
    
    .optimization-grid {
        grid-template-columns: 1fr;
    }
    
    .monitoring-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .page-container {
        padding: var(--spacing-md);
    }
    
    .monitoring-grid {
        grid-template-columns: 1fr;
    }
    
    .user-menu span {
        display: none;
    }
}

/* ============================================
   Utilities
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .sidebar,
    .top-header,
    .card-actions,
    .workflow-controls,
    .config-actions {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .dashboard-card,
    .optimization-card,
    .monitor-card {
        break-inside: avoid;
    }
}