/* css/style.css */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --text-color: #333;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 0;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 140px);
    padding: 2rem 0;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0;
    text-align: center;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #2980b9;
}

/* Card Styles */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

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

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.card-header i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--light-color);
    text-align: center;
}

/* Materi Styles */
.materi-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.materi-header {
    border-bottom: 2px solid var(--light-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.materi-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--light-color);
}

.sidebar {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 0.5rem;
}

.sidebar-menu a {
    display: block;
    padding: 0.8rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: var(--secondary-color);
    color: white;
}

/* Alert Styles */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.alert-warning {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

/* Code Blocks */
.code-block {
    background-color: #2d3748;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
}

/* Add to existing css/style.css */

/* Enhanced Card Styles */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid #e2e8f0;
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--secondary-color);
}

/* Progress Indicator */
.progress-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
    position: sticky;
    top: 80px;
    z-index: 999;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Learning Objectives */
.learning-objectives {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.objective-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.objective-item i {
    color: #ffd700;
    margin-top: 0.2rem;
}

/* Platform Comparison */
.platform-comparison {
    overflow-x: auto;
    margin: 2rem 0;
}

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

.comparison-table th,
.comparison-table td {
    padding: 1.2rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.comparison-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
}

.comparison-table tr:hover {
    background-color: #f8fafc;
}

/* Step-by-step Guide */
.step-guide {
    counter-reset: step-counter;
}

.step-item {
    position: relative;
    padding: 2rem 0 2rem 4rem;
    border-left: 3px solid var(--secondary-color);
    margin-left: 2rem;
}

.step-item::before {
    counter-increment: step-counter;
    content: counter(step-counter);
    position: absolute;
    left: -1.5rem;
    top: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.step-content {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Badge Styles */
.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--accent-color);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.badge-new {
    background: var(--success-color);
}

.badge-popular {
    background: var(--warning-color);
}

/* Tooltip */
.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted var(--secondary-color);
    cursor: help;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    border-radius: 6px;
    padding: 0.5rem;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* Download Resources */
.download-resources {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.resource-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.resource-item:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(10px);
}

/* Add to existing css/style.css */

/* CI/CD Pipeline Visualization */
.pipeline-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    overflow-x: auto;
}

.pipeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-width: 800px;
}

.pipeline-stage {
    text-align: center;
    flex: 1;
    position: relative;
}

.pipeline-stage::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -50%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    z-index: 1;
}

.pipeline-stage:last-child::after {
    display: none;
}

.stage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
    position: relative;
    z-index: 2;
}

.stage-status {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 25px;
    height: 25px;
    background: var(--success-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.8rem;
}

/* Code Editor Simulation */
.code-editor {
    background: #1e1e1e;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 1.5rem 0;
}

.editor-header {
    background: #2d2d2d;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid #404040;
}

.editor-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.editor-dot.red { background: #ff5f56; }
.editor-dot.yellow { background: #ffbd2e; }
.editor-dot.green { background: #27ca3f; }

.editor-title {
    color: #ccc;
    font-size: 0.9rem;
    margin-left: 1rem;
}

.editor-content {
    padding: 1.5rem;
    font-family: 'Courier New', monospace;
    color: #e2e8f0;
    line-height: 1.5;
}

/* Tool Comparison */
.tool-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tool-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    border: 2px solid transparent;
    transition: var(--transition);
}

.tool-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
}

.tool-card.featured {
    border-color: var(--accent-color);
    position: relative;
}

.tool-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Workflow Steps */
.workflow-steps {
    counter-reset: workflow-counter;
}

.workflow-step {
    position: relative;
    padding: 2rem 0 2rem 5rem;
    margin-bottom: 2rem;
}

.workflow-step::before {
    counter-increment: workflow-counter;
    content: counter(workflow-counter);
    position: absolute;
    left: 0;
    top: 2rem;
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.5rem;
}

.workflow-content {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Status Indicators */
.status-success { color: var(--success-color); }
.status-warning { color: var(--warning-color); }
.status-error { color: var(--accent-color); }

/* Configuration Blocks */
.config-block {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
}

.config-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary-color);
}

/* Integration Demo */
.integration-demo {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.demo-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.demo-step {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

/* Add to existing css/style.css */

/* Serverless Architecture Visualization */
.architecture-diagram {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
    overflow: hidden;
}

.architecture-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.flow-arrow {
    position: absolute;
    top: 50%;
    left: 20%;
    right: 20%;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    z-index: 1;
}

.flow-arrow::after {
    content: '➤';
    position: absolute;
    right: -10px;
    top: -12px;
    color: var(--accent-color);
    font-size: 1.5rem;
}

.architecture-node {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 2;
}

.node-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
    border: 4px solid white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Serverless Platform Cards */
.serverless-platform {
    border: 2px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.serverless-platform::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.serverless-platform:hover::before {
    left: 100%;
}

.serverless-platform.featured {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.platform-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1rem 0;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    display: block;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* Code Comparison */
.code-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.comparison-title {
    text-align: center;
    padding: 0.5rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Function Configuration */
.function-config {
    background: #1a1a1a;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    overflow: hidden;
}

.config-tabs {
    display: flex;
    background: #2d2d2d;
    border-bottom: 1px solid #404040;
}

.config-tab {
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    color: #ccc;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.config-tab.active {
    background: #1a1a1a;
    color: white;
    border-bottom-color: var(--accent-color);
}

.config-content {
    padding: 1.5rem;
}

/* Pricing Calculator */
.pricing-calculator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.calculator-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.calc-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 0.8rem;
    color: white;
    backdrop-filter: blur(10px);
}

.calc-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.calc-result {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    margin-top: 1rem;
}

/* Use Case Showcase */
.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.use-case-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.use-case-card:hover {
    transform: translateX(10px);
    border-left-color: var(--accent-color);
}

/* Cold Start Visualization */
.cold-start-demo {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
}

.timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--light-color);
    z-index: 1;
}

.timeline-item {
    text-align: center;
    position: relative;
    z-index: 2;
    flex: 1;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--secondary-color);
    border-radius: 50%;
    margin: 0 auto 0.5rem;
    position: relative;
}

.timeline-dot.active {
    background: var(--accent-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Add to existing css/style.css */

/* Performance Metrics Dashboard */
.metrics-dashboard {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.metric-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.metric-card.critical {
    border-left-color: var(--accent-color);
    background: #ffeaea;
}

.metric-card.warning {
    border-left-color: var(--warning-color);
    background: #fff3cd;
}

.metric-card.optimal {
    border-left-color: var(--success-color);
    background: #e8f5e8;
}

.metric-value {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* Cost Comparison Charts */
.cost-comparison {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
}

.chart-container {
    height: 300px;
    position: relative;
    margin: 2rem 0;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 15px;
    height: 15px;
    border-radius: 3px;
}

/* Performance Testing Interface */
.testing-interface {
    background: #1a1a1a;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    color: white;
}

.test-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.test-input {
    background: #2d2d2d;
    border: 1px solid #404040;
    border-radius: var(--border-radius);
    padding: 0.8rem;
    color: white;
    font-family: 'Courier New', monospace;
}

.test-button {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.test-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.test-results {
    background: #2d2d2d;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
}

/* Optimization Recommendations */
.optimization-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.optimization-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    border-top: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.optimization-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.optimization-card.cost {
    border-top-color: var(--success-color);
}

.optimization-card.performance {
    border-top-color: var(--warning-color);
}

.optimization-card.security {
    border-top-color: var(--accent-color);
}

.optimization-impact {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--success-color);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.optimization-impact.high {
    background: var(--accent-color);
}

.optimization-impact.medium {
    background: var(--warning-color);
}

/* TCO Calculator */
.tco-calculator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.calc-section {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.calc-input-group {
    margin-bottom: 1rem;
}

.calc-input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.calc-input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.calc-result {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
}

/* Benchmark Results */
.benchmark-results {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    overflow-x: auto;
}

.benchmark-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.benchmark-table th,
.benchmark-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.benchmark-table th {
    background: var(--light-color);
    font-weight: 600;
    color: var(--primary-color);
}

.benchmark-table tr:hover {
    background: #f8fafc;
}

.benchmark-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.benchmark-badge.best {
    background: var(--success-color);
    color: white;
}

.benchmark-badge.good {
    background: var(--warning-color);
    color: white;
}

.benchmark-badge.poor {
    background: var(--accent-color);
    color: white;
}

/* Load Testing Visualization */
.load-test-viz {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
}

.viz-timeline {
    display: flex;
    align-items: center;
    margin: 2rem 0;
    position: relative;
    height: 100px;
}

.viz-bar {
    position: absolute;
    height: 40px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 20px;
    transition: all 0.3s ease;
}

.viz-label {
    position: absolute;
    bottom: -30px;
    font-size: 0.8rem;
    color: var(--text-color);
}

/* Add to existing css/style.css */

/* Exam Specific Styles */
.exam-header {
    background: linear-gradient(135deg, #ff6b6b, #ffa8a8);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    text-align: center;
}

.exam-timer {
    background: white;
    color: var(--accent-color);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 2rem;
    font-weight: bold;
    display: inline-block;
    margin: 1rem 0;
    box-shadow: var(--box-shadow);
}

.exam-warning {
    background: linear-gradient(135deg, #ffd93d, #ff6b6b);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    border-left: 5px solid var(--accent-color);
}

/* Task Sections */
.task-section {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
    overflow: hidden;
}

.task-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: between;
    align-items: center;
}

.task-points {
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
}

.task-body {
    padding: 2rem;
}

.task-requirements {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    border-left: 4px solid var(--secondary-color);
}

/* Architecture Diagram */
.architecture-diagram {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
    text-align: center;
}

.diagram-container {
    display: inline-block;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.diagram-node {
    display: inline-block;
    background: white;
    padding: 1rem 2rem;
    margin: 0.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 2px solid var(--secondary-color);
    font-weight: 600;
}

.diagram-arrow {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin: 0 1rem;
}

/* Code Submission */
.submission-guide {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.submission-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.submission-step {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

/* Grading Rubric */
.grading-rubric {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
    overflow: hidden;
}

.rubric-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    text-align: center;
}

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

.rubric-table th,
.rubric-table td {
    padding: 1.2rem;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.rubric-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: var(--primary-color);
}

.rubric-table tr:hover {
    background: #f8f9fa;
}

/* Cheat Sheet */
.cheat-sheet {
    background: #fff3cd;
    border: 2px solid #ffd93d;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
}

.cheat-section {
    margin-bottom: 1.5rem;
}

.cheat-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid #ffd93d;
    padding-bottom: 0.5rem;
}

/* Exam Controls */
.exam-controls {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    bottom: 20px;
    z-index: 100;
}

/* Critical Alert */
.critical-alert {
    background: linear-gradient(135deg, #ff6b6b, #ffa8a8);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    border: 3px solid #ff4757;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { border-color: #ff4757; }
    50% { border-color: #ff6b6b; }
    100% { border-color: #ff4757; }
}

/* Platform Selection */
.platform-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.platform-option {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 3px solid transparent;
}

.platform-option:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color);
}

.platform-option.selected {
    border-color: var(--accent-color);
    background: #fff5f5;
}

/* Submission Checklist */
.checklist {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
}

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

.checklist-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
}

.checklist-item.checked {
    background: #e8f5e8;
    border-radius: var(--border-radius);
}

/* Add to existing css/style.css */

/* Cost Optimization Specific Styles */
.cost-dashboard {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
}

.cost-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.cost-metric {
    text-align: center;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.cost-metric.savings {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

.cost-metric.warning {
    background: linear-gradient(135deg, #ffd93d, #ff6b6b);
}

.metric-value {
    font-size: 2rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.metric-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Pricing Models */
.pricing-models {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.pricing-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    text-align: center;
    border: 3px solid transparent;
    transition: var(--transition);
    position: relative;
}

.pricing-card.recommended {
    border-color: var(--success-color);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--success-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 1rem 0;
}

.pricing-period {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

/* Savings Calculator */
.savings-calculator {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.calculator-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.calc-input {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 1rem;
    color: white;
    backdrop-filter: blur(10px);
}

.calc-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.calc-result {
    background: rgba(255, 255, 255, 0.2);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Optimization Strategies */
.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.strategy-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    border-left: 5px solid var(--secondary-color);
}

.strategy-card.savings-high {
    border-left-color: var(--success-color);
}

.strategy-card.savings-medium {
    border-left-color: var(--warning-color);
}

.strategy-card.savings-low {
    border-left-color: var(--accent-color);
}

.strategy-impact {
    display: inline-block;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.impact-high { background: var(--success-color); color: white; }
.impact-medium { background: var(--warning-color); color: white; }
.impact-low { background: var(--accent-color); color: white; }

/* Cost Comparison Charts */
.comparison-chart {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
}

.chart-container {
    height: 300px;
    margin: 2rem 0;
    position: relative;
}

.chart-bar {
    display: flex;
    align-items: center;
    margin: 1rem 0;
    gap: 1rem;
}

.chart-label {
    min-width: 150px;
    font-weight: 600;
}

.chart-value {
    flex: 1;
    height: 30px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 15px;
    position: relative;
    transition: all 0.3s ease;
}

.chart-value:hover {
    transform: scaleY(1.1);
}

.chart-amount {
    position: absolute;
    right: -80px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 600;
}

/* Platform Specific Costing */
.platform-costing {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.cost-breakdown {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.cost-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #e9ecef;
}

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

.cost-category {
    font-weight: 600;
    color: var(--primary-color);
}

.cost-amount {
    font-weight: 600;
}

/* OpenNebula Cost Optimization */
.opennebula-costing {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.cost-tip {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    border-left: 4px solid var(--accent-color);
}

/* Automated Scripts */
.automation-scripts {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
}

.script-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 1rem;
}

.script-tab {
    padding: 0.8rem 1.5rem;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.script-tab.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.script-content {
    display: none;
}

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

/* Add to existing css/style.css */

/* Containerization Specific Styles */
.architecture-visual {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
}

.container-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.flow-item {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    border-radius: var(--border-radius);
    min-width: 120px;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--secondary-color);
}

/* Docker vs VM Comparison */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.comparison-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    text-align: center;
}

.comparison-header {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.vm-header {
    background: linear-gradient(135deg, #ff6b6b, #ffa8a8);
    color: white;
}

.container-header {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    color: white;
}

.feature-list {
    text-align: left;
    margin: 1.5rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

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

/* Multi-tier Application */
.multi-tier-architecture {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
}

.tier {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.tier-label {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    min-width: 150px;
    text-align: center;
}

.tier-components {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.tier-component {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 2px solid var(--secondary-color);
    text-align: center;
    min-width: 120px;
}

/* Kubernetes Cluster Visualization */
.k8s-cluster {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
}

.cluster-diagram {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.control-plane, .worker-nodes {
    text-align: center;
}

.control-plane {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    min-width: 200px;
}

.worker-node {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    min-width: 180px;
}

/* Code Editor with Tabs */
.docker-editor {
    background: #1e1e1e;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 2rem 0;
}

.editor-tabs {
    display: flex;
    background: #2d2d2d;
    border-bottom: 1px solid #404040;
}

.editor-tab {
    padding: 1rem 1.5rem;
    background: #2d2d2d;
    color: #ccc;
    cursor: pointer;
    border-right: 1px solid #404040;
    transition: var(--transition);
}

.editor-tab.active {
    background: #1e1e1e;
    color: white;
    border-bottom: 2px solid var(--secondary-color);
}

.editor-content {
    display: none;
    padding: 1.5rem;
}

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

/* Health Checks & Probes */
.probes-demo {
    background: linear-gradient(135deg, #ffd93d, #ff6b6b);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.probe-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.probe-type {
    background: rgba(255, 255, 255, 0.2);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    backdrop-filter: blur(10px);
}

/* Deployment Strategies */
.deployment-strategies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.strategy-demo {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.strategy-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.traffic-split {
    display: flex;
    height: 40px;
    border-radius: 20px;
    overflow: hidden;
    margin: 1rem 0;
}

.traffic-portion {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* Interactive Demos */
.interactive-demo {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
}

.demo-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.pod-visualization {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.pod {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    min-width: 150px;
    position: relative;
    transition: var(--transition);
}

.pod.scaling {
    animation: scalePod 0.5s ease-in-out;
}

@keyframes scalePod {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Platform Specific Configurations */
.platform-configs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.platform-config {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    border-top: 5px solid var(--secondary-color);
}

.platform-config.aws {
    border-top-color: #ff9900;
}

.platform-config.opennebula {
    border-top-color: #667eea;
}

.platform-config.huawei {
    border-top-color: #ff0000;
}

/* Tambahkan di css/style.css */
.devops-architecture {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
}

.architecture-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.flow-step {
    text-align: center;
    flex: 1;
    min-width: 120px;
}

.flow-step i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.flow-arrow {
    color: var(--accent-color);
    font-size: 1.5rem;
}

/* Review Timeline Styles */
.review-timeline {
    margin: 2rem 0;
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #3498db, #e74c3c);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    margin-bottom: 2rem;
    position: relative;
}

.timeline-marker {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-right: 2rem;
    flex-shrink: 0;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-left: 4px solid;
}

.topics-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.topic-tag {
    background: #f8f9fa;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid #e9ecef;
}

/* Tech Stack Styles */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tech-tag {
    background: var(--secondary-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* Checklist Styles */
.checklist-container {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
}

.checklist-section {
    margin-bottom: 2rem;
}

.checklist-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checklist {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.checklist-item:hover {
    background: #f8f9fa;
}

.checklist-item input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #ddd;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.checklist-item input[type="checkbox"]:checked + .checkmark {
    background: var(--success-color);
    border-color: var(--success-color);
}

.checklist-item input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 0.8rem;
}

/* Button Small */
.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline::before {
        left: 25px;
    }
    
    .timeline-marker {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
        margin-right: 1rem;
    }
    
    .timeline-content {
        padding: 1rem;
    }
    
    .topics-grid {
        gap: 0.3rem;
    }
    
    .topic-tag {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
}

/* Exam Banner Styles */
.exam-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
}

.exam-info {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.exam-icon {
    font-size: 3rem;
    opacity: 0.9;
}

.exam-details h2 {
    margin: 0 0 1rem 0;
    font-size: 1.8rem;
}

.exam-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.exam-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

/* Exam Scenario Styles */
.exam-scenario {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--secondary-color);
}

.scenario-header h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.scenario-requirements {
    margin-top: 1.5rem;
}

.requirements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1rem;
}

.requirement-category {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

.requirement-category h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
}

/* Task Sections */
.exam-tasks {
    margin: 2rem 0;
}

.task-section {
    background: white;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid #e9ecef;
}

.task-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.task-number {
    background: var(--accent-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.task-body {
    padding: 2rem;
}

.task-requirements, .task-deliverables {
    margin-bottom: 1.5rem;
}

.task-requirements h5, .task-deliverables h5 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.code-hint {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--warning-color);
}

.code-hint h6 {
    color: var(--warning-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Timeline Strategy */
.timeline-strategy {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
}

.time-slot {
    display: flex;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e9ecef;
}

.time-slot:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.time-marker {
    background: var(--secondary-color);
    color: white;
    padding: 0.8rem 1.2rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    min-width: 120px;
    text-align: center;
    margin-right: 2rem;
}

.time-content {
    flex: 1;
}

.time-content h4 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

/* Architecture Diagram */
.architecture-diagram {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.arch-layer {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.layer-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.layer-components {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.arch-component {
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 150px;
}

.arch-arrow {
    font-size: 2rem;
    color: var(--secondary-color);
    margin: 0.5rem 0;
}

/* Cheat Sheet */
.cheat-sheet {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
}

.cheat-category {
    margin-bottom: 2rem;
}

.cheat-category:last-child {
    margin-bottom: 0;
}

.cheat-category h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Important Notes */
.important-notes {
    margin: 2rem 0;
}

.note-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.note-item.warning {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

.note-item.info {
    background: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

.note-item.success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.note-item i {
    font-size: 1.5rem;
    margin-top: 0.2rem;
}

/* Submission Guidelines */
.submission-guidelines {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--box-shadow);
}

.submission-checklist {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.submission-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    background: #f8f9fa;
    transition: var(--transition);
}

.submission-item:hover {
    background: #e9ecef;
}

/* Exam Footer */
.exam-footer {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #27ae60, #229954);
    color: white;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.success-message i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.success-message h3 {
    margin-bottom: 1rem;
    font-size: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .exam-info {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .exam-meta {
        justify-content: center;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .time-slot {
        flex-direction: column;
        gap: 1rem;
    }
    
    .time-marker {
        margin-right: 0;
    }
    
    .layer-components {
        flex-direction: column;
        align-items: center;
    }
    
    .arch-component {
        min-width: auto;
        width: 100%;
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .exam-banner {
        padding: 1.5rem;
    }
    
    .exam-details h2 {
        font-size: 1.4rem;
    }
    
    .exam-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .task-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

/* Notification styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 10000;
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid var(--secondary-color);
}

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

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

.notification-close {
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition);
}

.notification-close:hover {
    opacity: 1;
}

.fade-out {
    animation: slideOutRight 0.3s ease-in forwards;
}

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

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

/* Animation classes */
.animate-in {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Keyboard navigation indicator */
.keyboard-nav {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Enhanced Accessibility & Production Styles */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 4px 4px;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner.active {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--light-color);
    border-top: 5px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* No Script Warning */
.noscript-warning {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10000;
    background: var(--warning-color);
    color: white;
}

/* Focus styles for accessibility */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .mobile-menu-btn,
    .btn {
        display: none !important;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    a::after {
        content: " (" attr(href) ")";
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #0000ff;
        --text-color: #000000;
    }
    
    .card {
        border: 2px solid var(--text-color);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Enhanced error states */
.input-error {
    border-color: var(--danger-color) !important;
    background-color: #ffeaea;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Performance optimizations */
.card {
    content-visibility: auto;
    contain-intrinsic-size: 300px;
}

.hero {
    will-change: transform;
}