/**
 * Performance Monitoring Tutorial Styles
 * 
 * Consistent styling with other OddSockets tutorials
 * Uses the same CSS variables and layout patterns
 */

/* CSS Variables - Consistent with other tutorials */
:root {
    /* Colors */
    --primary-bg: #ffffff;
    --secondary-bg: #fafafa;
    --tertiary-bg: #f5f5f5;
    --hover-bg: #f8f8f8;
    --border-color: #e5e5e5;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent-primary: #2d2d2d;
    --accent-success: #4a5d23;
    --accent-warning: #b45309;
    --accent-danger: #dc2626;
    --accent-info: #0369a1;
    
    /* Performance monitoring specific colors */
    --performance-primary: #10b981;
    --performance-secondary: #059669;
    --performance-light: #d1fae5;
    --performance-dark: #064e3b;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    
    /* Layout */
    --border-radius: 0.25rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --transition: all 0.15s ease;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--secondary-bg);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Tutorial Header - Consistent with other tutorials */
.tutorial-header {
    background: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-6) 0;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.logo {
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    transition: color 0.2s ease;
    font-size: 0.95rem;
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-8);
}

.tutorial-info h1 {
    margin: 0 0 var(--space-1) 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.tutorial-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.tutorial-actions {
    display: flex;
    gap: var(--space-3);
}

/* Button Styles - Consistent with other tutorials */
.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    gap: var(--space-2);
    font-family: var(--font-family);
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--primary-bg);
    border-color: var(--accent-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--primary-bg);
}

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

.btn-outline:hover {
    background: var(--accent-primary);
    color: var(--primary-bg);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 12px;
}

.btn-warning {
    background: var(--accent-warning);
    color: var(--primary-bg);
    border-color: var(--accent-warning);
}

.btn-danger {
    background: var(--accent-danger);
    color: var(--primary-bg);
    border-color: var(--accent-danger);
}

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

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

/* Main Content */
.tutorial-main {
    padding: var(--space-6) 0;
    min-height: calc(100vh - 200px);
}

/* Performance Monitoring Specific Styles */
.monitoring-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* Metrics Section */
.metrics-section {
    background: var(--primary-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.metrics-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.metrics-info h3 {
    margin: 0 0 var(--space-1) 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.connection-status i {
    color: var(--performance-primary);
}

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

.metric-card {
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-4);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--performance-primary);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.metric-card:hover {
    border-color: var(--performance-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--performance-primary);
    margin-bottom: var(--space-2);
    line-height: 1;
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.metric-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Charts Section */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-4);
}

.chart-card {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.chart-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-color);
    background: var(--tertiary-bg);
}

.chart-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.chart-body {
    padding: var(--space-4);
    height: 300px;
}

/* Load Testing Section */
.load-testing-section {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.load-testing-header h3 {
    margin: 0 0 var(--space-2) 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.load-testing-header p {
    margin: 0 0 var(--space-4) 0;
    color: var(--text-secondary);
}

.load-testing-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.test-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.test-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.status-idle {
    background: var(--tertiary-bg);
    color: var(--text-secondary);
}

.status-running {
    background: #fef3c7;
    color: var(--accent-warning);
}

.status-complete {
    background: var(--performance-light);
    color: var(--performance-secondary);
}

.load-test-results {
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-4);
    margin-top: var(--space-4);
}

.load-test-results h4 {
    margin: 0 0 var(--space-4) 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.test-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-4);
}

.test-metric {
    text-align: center;
}

.progress-container {
    background: var(--border-color);
    border-radius: var(--border-radius);
    height: 8px;
    margin: var(--space-2) 0;
    overflow: hidden;
}

.progress-bar {
    background: var(--performance-primary);
    height: 100%;
    border-radius: var(--border-radius);
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Comparison Section */
.comparison-section {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.comparison-header h3 {
    margin: 0 0 var(--space-4) 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.comparison-table-container {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--primary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table th {
    background: var(--performance-primary);
    color: var(--primary-bg);
    font-weight: 600;
    padding: var(--space-4);
    text-align: center;
    border: none;
}

.comparison-table td {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    vertical-align: middle;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.winner-value {
    color: var(--performance-primary);
    font-weight: 700;
}

.winner-badge {
    background: var(--performance-primary);
    color: var(--primary-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Tutorial Sidebar - Consistent with other tutorials */
.tutorial-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--primary-bg);
    border-left: 1px solid var(--border-color);
    z-index: 1000;
    transition: right 0.3s ease;
    overflow-y: auto;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

.tutorial-sidebar.open {
    right: 0;
}

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

.sidebar-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sidebar-content {
    padding: var(--space-4);
}

.tutorial-steps {
    margin-bottom: var(--space-6);
}

.tutorial-step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-2);
    transition: var(--transition);
}

.tutorial-step.active {
    background: var(--performance-light);
    border-left: 3px solid var(--performance-primary);
}

.step-number {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
}

.tutorial-step.active .step-number {
    background: var(--performance-primary);
    color: var(--primary-bg);
}

.step-content h4 {
    margin: 0 0 var(--space-1) 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.step-content p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.sidebar-stats {
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--tertiary-bg);
    border-radius: var(--border-radius);
}

.sidebar-stats h4 {
    margin: 0 0 var(--space-4) 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border-color);
}

.stat-item:last-child {
    border-bottom: none;
}

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

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

.sidebar-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* Tutorial Toggle Button */
.tutorial-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--performance-primary);
    color: var(--primary-bg);
    border: none;
    border-radius: 50px;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.tutorial-toggle:hover {
    background: var(--performance-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    overflow-y: auto;
}

.modal.fade {
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.modal-dialog {
    background: var(--primary-bg);
    margin: 2rem auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    max-width: 500px;
    width: 90%;
}

.modal-content {
    border-radius: var(--border-radius);
    overflow: hidden;
}

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

.modal-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-body {
    padding: var(--space-4);
}

/* Error Container */
.error-container {
    padding: var(--space-4) 0;
}

.alert {
    padding: var(--space-4);
    border-radius: var(--border-radius);
    border: 1px solid transparent;
    margin-bottom: var(--space-4);
}

.alert-danger {
    background: #fef2f2;
    border-color: #fecaca;
    color: #991b1b;
}

.error-content h4 {
    margin: 0 0 var(--space-2) 0;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.error-content p {
    margin: 0 0 var(--space-4) 0;
}

.error-actions {
    display: flex;
    gap: var(--space-3);
}

/* Footer - Consistent with other tutorials */
.footer {
    background-color: #111827;
    color: #d1d5db;
    padding: 3rem 2rem 2rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
}

.footer-bottom-left p {
    color: #9ca3af;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom-links a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
}

.footer-bottom-links a:hover {
    color: #d1d5db;
}

.footer-bottom-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #9ca3af;
    font-size: 0.875rem;
    cursor: pointer;
}

.language-selector:hover {
    color: #d1d5db;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .header-content {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .tutorial-actions {
        flex-wrap: wrap;
        justify-content: center;
    }

    .real-time-metrics {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--space-3);
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .chart-body {
        height: 250px;
    }

    .load-testing-controls {
        flex-direction: column;
        gap: var(--space-4);
        align-items: stretch;
    }

    .test-buttons {
        justify-content: center;
    }

    .test-status {
        justify-content: center;
    }

    .tutorial-sidebar {
        width: 100%;
        right: -100%;
    }

    .tutorial-toggle {
        bottom: 20px;
        right: 20px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-bottom-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-2);
    }

    .tutorial-main {
        padding: var(--space-4) 0;
    }

    .tutorial-info h1 {
        font-size: 1.25rem;
    }

    .real-time-metrics {
        grid-template-columns: 1fr;
    }

    .test-buttons {
        flex-direction: column;
        align-items: stretch;
    }

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

    .comparison-table {
        font-size: 0.8rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: var(--space-2);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .footer-bottom-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.metric-value.updating {
    animation: pulse 0.5s ease-in-out;
}

/* Accessibility */
.metric-card:focus-within {
    outline: 2px solid var(--performance-primary);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .metric-card,
    .progress-bar,
    .tutorial-toggle {
        transition: none;
    }
    
    .fade-in,
    .pulse {
        animation: none;
    }
}