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

:root {
    /* CERN-Technical Time Microscope Theme */
    --cern-slate-dark: #1e293b;
    --cern-slate-grey: #64748b;
    --cern-amber: #f59e0b;
    --cern-amber-glow: rgba(245, 158, 11, 0.15);
    --cern-glass-bg: rgba(30, 41, 59, 0.7);
    
    /* Unified theme variables (dark with Webb background) */
    --bg-primary: #0f172a;
    --bg-secondary: rgba(30, 41, 59, 0.5);
    --bg-tertiary: #334155;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-accent: #cbd5e1;
    --border-color: rgba(245, 158, 11, 0.3);
    --nav-bg: rgba(15, 23, 42, 0.95);
    --card-bg: rgba(30, 41, 59, 0.5);
    --shadow: rgba(0, 0, 0, 0.3);
    --accent-color: #f59e0b;
    --accent-hover: #fbbf24;
    --wave-function-color: #64748b;
    --vector-star-color: #ea580c;
    --measurement-window-color: rgba(245, 158, 11, 0.25);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image: 
        linear-gradient(to bottom, rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.92)),
        repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(245, 158, 11, 0.03) 50px, rgba(245, 158, 11, 0.03) 51px),
        repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(245, 158, 11, 0.03) 50px, rgba(245, 158, 11, 0.03) 51px),
        url('../gravitational-time-microscope/images/webb_cosmos.jpg');
    background-attachment: fixed;
    background-size: auto, auto, auto, cover;
    background-position: center, center, center, center;
    background-blend-mode: normal, overlay, overlay, normal;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Navigation (Legacy - Hidden by default, sidebar is primary) */
.navbar {
    display: none;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    min-height: 60px;
    gap: 1rem;
}

.nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 16px;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-menu li {
    flex: 0 0 auto;
}

.nav-primary {
    flex-wrap: nowrap;
    overflow-x: auto;
    min-width: 0;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
}

.nav-secondary {
    flex-wrap: wrap;
    gap: 12px 18px;
    padding-top: 6px;
    border-top: 1px solid var(--border-color);
}

.nav-secondary a {
    font-size: 0.92rem;
    padding: 6px 12px;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent-color);
    background-color: var(--bg-tertiary);
}

/* Main Content */
main {
    margin-top: 0;
    margin-right: 300px;
    min-height: 100vh;
    padding: 3rem 4rem;
}

@media (max-width: 1024px) {
    main {
        margin-right: 0;
        padding: 2rem 1.5rem;
    }
}

/* Page Headers */
.page-header {
    text-align: center;
    padding: 60px 20px 40px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.6) 0%, transparent 100%);
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Homepage Styles */
.homepage {
    padding: 0;
}

.hero {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--accent-color), var(--vector-star-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visualization-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

.controls-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    align-items: center;
    margin-bottom: 40px;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
}

.control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.control-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 60px;
    height: 30px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.3s;
    border-radius: 30px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

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

input:checked + .toggle-slider:before {
    transform: translateX(30px);
}

.toggle-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 150px;
}

/* Slider */
#delta-t-slider {
    width: 200px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

#delta-t-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

#delta-t-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.slider-value {
    font-weight: bold;
    color: var(--accent-color);
    font-size: 0.9rem;
}

/* Reset Button */
.reset-button {
    padding: 10px 20px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    width: 100%;
    max-width: 200px;
}

.reset-button:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Legend */
.legend {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.legend-color.wave-function {
    background-color: var(--wave-function-color);
}

.legend-color.vector-star {
    background-color: var(--vector-star-color);
}

.legend-color.measurement-window {
    background-color: var(--measurement-window-color);
    border: 1px solid var(--border-color);
}

/* Visualization Container */
.visualization-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.visualization-panel {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
}

.visualization-panel h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.visualization-panel canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
}

/* Explanation Panel */
.explanation-panel {
    text-align: left;
    padding: 30px;
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    max-width: 1000px;
    margin: 0 auto;
}

/* Explanation Tabs */
.explanation-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.tab-button {
    padding: 10px 20px;
    background: none;
    border: none;
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

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

.tab-button.active {
    background-color: var(--accent-color);
    color: white;
}

.tab-content {
    display: none;
    padding: 20px 0;
}

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

.tab-content h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.tab-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
    font-size: 1rem;
}

.tab-content strong {
    color: var(--text-primary);
}

/* Dynamic Explanation */
.dynamic-explanation {
    margin-top: 30px;
    padding: 20px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.highlight-text {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-primary);
    font-style: italic;
}

/* Tutorial Panel */
.tutorial-panel {
    margin-top: 30px;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.tutorial-panel h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.4rem;
}

.tutorial-steps {
    display: grid;
    gap: 15px;
    counter-reset: step-counter;
}

.tutorial-steps li {
    counter-increment: step-counter;
    padding: 15px 20px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
    position: relative;
    color: var(--text-primary);
    line-height: 1.6;
}

.tutorial-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: -15px;
    top: 15px;
    width: 25px;
    height: 25px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.tutorial-steps strong {
    color: var(--accent-color);
}

/* Insights Panel */
.insights-panel {
    margin-top: 40px;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.insights-panel h3 {
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.6rem;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.insight-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid var(--accent-color);
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.insight-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.2);
}

.insight-icon {
    font-size: 2rem;
    margin-bottom: 15px;
    text-align: center;
}

.insight-card h4 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 1.1rem;
    text-align: center;
}

.insight-card p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.95rem;
    text-align: center;
}

/* Thought Experiment Page Styles */
.thought-experiment {
    padding: 0;
}

.experiment-intro {
    padding: 40px 20px;
    background-color: var(--bg-secondary);
}

.experiment-intro .intro-card {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
}

.experiment-intro .intro-card h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 2rem;
}

.experiment-intro .intro-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
    margin-bottom: 15px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.experiment-intro .callout {
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent-color);
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.experiment-intro .callout p {
    font-style: italic;
    font-weight: 600;
    color: var(--text-primary);
}

/* Animation Section */
.animation-section {
    padding: 40px 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.animation-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
    margin-bottom: 40px;
}

.animation-panel {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
    text-align: center;
}

.animation-panel h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.canvas-wrapper {
    position: relative;
    background-color: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

#bouncing-balls-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

/* Controls Panel */
.thought-experiment .controls-panel {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px var(--shadow);
}

.thought-experiment .control-group {
    margin-bottom: 20px;
}

.thought-experiment .control-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.ctrl-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.ctrl-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.ctrl-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.control-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.control-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

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

.play-btn:hover {
    background-color: var(--accent-hover);
}

.reset-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.reset-btn:hover {
    background-color: var(--border-color);
}

.cloud-btn {
    background-color: #9b59b6;
    color: white;
}

.cloud-btn:hover {
    background-color: #8e44ad;
}

.gravity-btn {
    background-color: #e67e22;
    color: white;
}

.gravity-btn:hover {
    background-color: #d35400;
}

/* Legend */
.thought-experiment .legend {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.thought-experiment .legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.legend-color.world-tube {
    background-color: #3498db;
}

.legend-color.vector-star {
    background-color: #e74c3c;
}

.legend-color.probability {
    background-color: #9b59b6;
    border: 2px solid rgba(155, 89, 182, 0.5);
}

.legend-color.gravity {
    background: linear-gradient(to right, #f39c12 0%, #e67e22 100%);
}

/* Explanation Panel */
.thought-experiment .explanation-panel {
    margin-bottom: 40px;
}

.thought-experiment .explanation-tabs {
    margin-bottom: 20px;
}

.thought-experiment .tab-button {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.thought-experiment .tab-content h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.thought-experiment .tab-content p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Key Insights */
.key-insights {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.key-insights h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 40px;
    font-size: 2rem;
}

.thought-experiment .insights-grid {
    max-width: 1200px;
    margin: 0 auto;
}

.thought-experiment .insight-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
    transition: transform 0.2s ease;
}

.thought-experiment .insight-card:hover {
    transform: translateY(-2px);
}

.thought-experiment .insight-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.thought-experiment .insight-card h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.thought-experiment .insight-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .animation-container {
        grid-template-columns: 1fr;
    }

    .control-buttons {
        grid-template-columns: 1fr;
    }

    .thought-experiment .legend {
        grid-template-columns: 1fr;
    }

    .experiment-intro .intro-card {
        padding: 30px 20px;
    }

    .thought-experiment .controls-panel {
        padding: 20px;
    }
}

/* Easy Tutorial Styles */
.easy-tutorial {
    padding: 0;
}

/* Analogy Intro */
.analogy-intro {
    padding: 40px 20px;
    background-color: var(--bg-secondary);
}

.intro-card {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
}

.intro-card h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 2rem;
}

.intro-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
    margin-bottom: 15px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.intro-card strong {
    color: var(--accent-color);
    font-weight: 600;
}

/* Bouncing Ball Demo */
.bouncing-ball-demo {
    padding: 40px 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.demo-controls {
    margin-bottom: 30px;
}

.demo-controls h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.play-button {
    padding: 12px 24px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.play-button:hover {
    background-color: var(--accent-hover);
}

/* Ball Visualization */
.ball-visualization {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
}

.ball-canvas-container {
    position: relative;
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px var(--shadow);
}

#bouncing-ball-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    background: linear-gradient(to bottom, #87CEEB 0%, #98FB98 100%);
    border: 2px solid var(--border-color);
}

.canvas-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    pointer-events: none;
}

.time-indicators {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    gap: 20px;
}

.time-marker {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Ball Explanation */
.ball-explanation {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px var(--shadow);
}

.ball-explanation .explanation-tabs {
    margin-bottom: 20px;
}

.ball-explanation .tab-button {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.ball-explanation .tab-content h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.ball-explanation .tab-content p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Quantum Connection */
.quantum-connection {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.connection-card {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
}

.connection-card h2 {
    color: var(--text-primary);
    margin-bottom: 40px;
    font-size: 2rem;
}

.analogy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.analogy-item {
    background-color: var(--bg-tertiary);
    padding: 25px;
    border-radius: 10px;
    border-left: 4px solid var(--accent-color);
}

.analogy-item h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.analogy-item ul {
    text-align: left;
    color: var(--text-secondary);
    line-height: 1.6;
}

.analogy-item li {
    margin-bottom: 8px;
}

/* Interactive Experiment */
.interactive-experiment {
    padding: 60px 20px;
}

.interactive-experiment h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 40px;
    font-size: 2rem;
}

.experiment-setup {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.experiment-description {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
}

.experiment-description h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.experiment-description p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.experiment-steps ol {
    color: var(--text-secondary);
    line-height: 1.6;
}

.experiment-steps li {
    margin-bottom: 10px;
}

.gravity-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.comparison-panel {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
}

.comparison-panel h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.gravity-indicator {
    background-color: var(--bg-tertiary);
    padding: 20px;
    border-radius: 8px;
}

.gravity-level {
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.probability-preview {
    height: 60px;
    background: linear-gradient(to right, rgba(52, 152, 219, 0.8) 20%, rgba(52, 152, 219, 0.4) 50%, rgba(52, 152, 219, 0.8) 80%);
    border-radius: 4px;
    position: relative;
}

.probability-preview::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 10px;
    width: 2px;
    height: 40px;
    background-color: var(--vector-star-color);
    transform: translateX(-50%);
}

/* Key Takeaways */
.key-takeaways {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.key-takeaways h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 40px;
    font-size: 2rem;
}

.takeaways-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.takeaway-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.takeaway-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.2);
}

.takeaway-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.takeaway-card h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.takeaway-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .ball-visualization {
        grid-template-columns: 1fr;
    }

    .experiment-setup {
        grid-template-columns: 1fr;
    }

    .control-row {
        flex-direction: column;
        gap: 20px;
    }

    .analogy-grid {
        grid-template-columns: 1fr;
    }

    .takeaways-grid {
        grid-template-columns: 1fr;
    }
}

/* Theory Page Styles */
.theory-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

.theory-section {
    margin-bottom: 40px;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
}

.theory-section h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.theory-section p {
    line-height: 1.7;
    color: var(--text-secondary);
}

.callout {
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent-color);
    padding: 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
}

.callout p {
    font-style: italic;
    font-weight: 600;
    color: var(--text-primary);
}

/* Key Concepts */
.key-concepts {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.key-concepts h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
    font-size: 2rem;
}

.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.concept-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.concept-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.2);
}

.concept-card h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.concept-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Comparisons Page Styles */
.comparisons-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.interpretation-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.interpretation-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.2);
}

.interpretation-card h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.interpretation-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.description p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.relationship {
    font-weight: 600;
    color: var(--accent-color);
    padding: 10px 0;
    border-top: 1px solid var(--border-color);
}

.vspd-highlight {
    border: 2px solid var(--accent-color);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(0, 123, 255, 0.05) 100%);
}

.compatibility-statement {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.statement-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
}

.statement-box h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.statement-box p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.1rem;
}

/* Experiments Page Styles */
.experiments-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.experiment-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.experiment-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.2);
}

.experiment-card h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.experiment-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.experiment-content .description p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.observability {
    font-weight: 600;
    color: var(--vector-star-color);
    padding: 10px 0;
    border-top: 1px solid var(--border-color);
}

.testability-statement {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.testability-statement .statement-box {
    max-width: 900px;
}

/* About Page Styles */
.bio-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.bio-content,
.methodology {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
}

.bio-content h2,
.methodology h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.bio-content p,
.methodology p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.contact-section {
    padding: 60px 20px;
    background-color: var(--bg-secondary);
}

.contact-section h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
    font-size: 2rem;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-content > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.contact-methods {
    margin-bottom: 40px;
}

.contact-method h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.contact-link {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.contact-link:hover {
    background-color: var(--accent-hover);
    text-decoration: none;
}

.contact-form {
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
}

.contact-form h3 {
    color: var(--text-primary);
    margin-bottom: 30px;
    font-size: 1.4rem;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.contact-submit {
    display: inline-block;
    padding: 14px 28px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.contact-submit:hover {
    background-color: var(--accent-hover);
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    background: transparent;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-right: 300px;
}

@media (max-width: 1024px) {
    .footer {
        margin-right: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        background-size: auto, auto, auto, 200% auto;
        background-position: center, center, center, center top;
    }

    .nav-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .nav-menu {
        gap: 15px;
    }

    .nav-secondary {
        gap: 10px 14px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .visualization-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .controls-panel {
        flex-direction: column;
        gap: 20px;
    }

    .legend {
        justify-content: center;
    }

    .bio-section {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .comparisons-content,
    .experiments-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .concepts-grid {
        grid-template-columns: 1fr;
    }
}

/* Fixed Vertical Sidebar Navigation - Time Microscope Theme */
.sidebar-nav {
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    width: 280px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-left: 1px solid var(--cern-amber);
    padding: 2rem 1.5rem;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
}

.sidebar-nav h3 {
    color: var(--cern-amber);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 1rem 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
}

.sidebar-nav li {
    margin-bottom: 0.75rem;
}

.sidebar-nav a {
    color: var(--text-accent);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    display: block;
    padding: 0.5rem;
    border-left: 2px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--cern-amber);
    border-left-color: var(--cern-amber);
    background: var(--cern-amber-glow);
    text-decoration: none;
}

/* Main content adjustment for sidebar */
.main-content-with-sidebar {
    margin-right: 300px;
    padding: 3rem 4rem;
}

/* Responsive sidebar */
@media (max-width: 1024px) {
    .sidebar-nav {
        position: relative;
        width: 100%;
        height: auto;
        border-left: none;
        border-bottom: 1px solid #f59e0b;
    }

    .main-content-with-sidebar {
        margin-right: 0;
        padding: 2rem 1.5rem;
    }
}

/* Dark mode toggle button (removed) */
.theme-toggle {
    display: none;
}

/* Animation classes for canvas elements */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Canvas animation styles */
.canvas-container {
    position: relative;
}

.measurement-window-overlay {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    border-radius: 8px;
}

/* ========== HL-LHC SOA 2.0 Enrichment Page (uses global theme) ========== */
.hl-lhc-main {
    margin-top: 60px;
    min-height: calc(100vh - 120px);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.hl-lhc-header {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hl-lhc-header h1 {
    color: var(--text-primary);
}

.hl-lhc-header .subtitle {
    color: var(--text-secondary);
}

.hl-lhc-content {
    padding: 40px 20px 60px;
}

.hl-lhc-section {
    margin-bottom: 2.5rem;
}

.hl-lhc-section h2 {
    color: var(--accent-color);
    font-size: 1.35rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.hl-lhc-section h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin: 1.25rem 0 0.75rem;
}

.hl-lhc-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.hl-lhc-section strong {
    color: var(--text-primary);
}

.hl-lhc-table-wrap {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.hl-lhc-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--card-bg);
}

.hl-lhc-table th,
.hl-lhc-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.hl-lhc-table th {
    background-color: var(--bg-secondary);
    color: var(--accent-color);
    font-weight: 600;
}

.hl-lhc-table td {
    color: var(--text-secondary);
}

.hl-lhc-table tbody tr:last-child td {
    border-bottom: none;
}

.hl-lhc-table tbody tr:hover td {
    background-color: var(--bg-tertiary);
}

.hl-lhc-workflow {
    margin: 1rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.hl-lhc-workflow li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.hl-lhc-workflow strong {
    color: var(--accent-color);
}

.hl-lhc-callout {
    background-color: var(--card-bg);
    border-left: 4px solid var(--accent-color);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}

.hl-lhc-callout p {
    margin-bottom: 0.75rem;
}

.hl-lhc-callout p:last-child {
    margin-bottom: 0;
}

.hl-lhc-luminosity-counter {
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.hl-lhc-counter-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.hl-lhc-progress-bar {
    height: 24px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.hl-lhc-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-color), #fbbf24);
    border-radius: 12px;
    transition: width 0.05s linear;
}

.hl-lhc-counter-value {
    color: var(--accent-color);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* ========== Content + Sidebar layout (simple explanation) ========== */
.content-with-sidebar {
    display: flex;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    align-items: flex-start;
}

.content-with-sidebar .main-content {
    flex: 1;
    min-width: 0;
}

.simple-explanation-sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    background-color: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 4px 12px var(--shadow);
}

.simple-explanation-sidebar h3 {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.simple-explanation-sidebar .sidebar-block {
    margin-bottom: 1.25rem;
}

.simple-explanation-sidebar .sidebar-block:last-child {
    margin-bottom: 0;
}

.simple-explanation-sidebar .sidebar-block h4 {
    font-size: 0.85rem;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.simple-explanation-sidebar .sidebar-block p {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
}

@media (max-width: 900px) {
    .content-with-sidebar {
        flex-direction: column;
    }

    .simple-explanation-sidebar {
        width: 100%;
        position: static;
        max-width: 100%;
    }
}