/* ========================================
   GAUSSIAN VS POWER LAW - DARK THEME
   Interactive Statistical Visualizations
   ======================================== */

/* CSS Variables */
:root {
    /* Background Colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;

    /* Text Colors */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    /* Accent Colors */
    --gaussian-color: #58a6ff;
    --gaussian-light: rgba(88, 166, 255, 0.2);
    --powerlaw-color: #f97583;
    --powerlaw-light: rgba(249, 117, 131, 0.2);
    --accent-green: #3fb950;
    --accent-yellow: #d29922;
    --accent-purple: #a371f7;

    /* UI Colors */
    --border-color: #30363d;
    --border-light: #21262d;
    --shadow: rgba(0, 0, 0, 0.4);

    /* Sizing */
    --sidebar-width: 260px;
    --header-height: 60px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--gaussian-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* ========================================
   NAVIGATION SIDEBAR
   ======================================== */

#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform var(--transition-normal);
}

.logo {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.logo h2 {
    font-size: 1.125rem;
    background: linear-gradient(135deg, var(--gaussian-color), var(--powerlaw-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    list-style: none;
    flex: 1;
    overflow-y: auto;
}

.nav-links li {
    margin-bottom: 0.25rem;
}

.nav-links a {
    display: block;
    padding: 0.625rem 0.875rem;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

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

.nav-links a.active {
    background-color: var(--gaussian-light);
    color: var(--gaussian-color);
}

/* Mobile Menu Toggle */
#menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    z-index: 1001;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

#menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-fast);
}

/* ========================================
   MAIN CONTENT
   ======================================== */

#main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.section {
    min-height: 100vh;
    padding: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    max-width: 800px;
    margin-bottom: 2rem;
}

.section-header h2 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.section-description {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========================================
   HERO SECTION
   ======================================== */

#hero {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, var(--gaussian-light) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, var(--powerlaw-light) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 700px;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--gaussian-color), var(--powerlaw-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, var(--gaussian-color), var(--accent-purple));
    color: white;
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(88, 166, 255, 0.3);
    color: white;
}

/* ========================================
   CONTROLS PANEL
   ======================================== */

.controls-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    background-color: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group h4 {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.control-group.options {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1rem;
}

.control {
    margin-bottom: 1rem;
}

.control label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.control label span {
    color: var(--gaussian-color);
    font-weight: 600;
}

/* Range Sliders */
input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--gaussian-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--gaussian-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

/* Checkboxes */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--gaussian-color);
    cursor: pointer;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: #79b8ff;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
    background-color: #ff8a94;
}

/* ========================================
   CHART CONTAINERS
   ======================================== */

.chart-container {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 1rem;
    margin-bottom: 2rem;
    min-height: 400px;
}

.chart-container.dual {
    display: flex;
    gap: 1rem;
}

.chart-half {
    flex: 1;
    min-height: 350px;
}

/* ========================================
   STATS PANEL
   ======================================== */

.stats-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    flex: 1;
    min-width: 200px;
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
}

.stat-card h4 {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

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

.stat-row span:first-child {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.stat-row span:last-child {
    font-weight: 600;
    font-family: 'Monaco', 'Menlo', monospace;
}

.gaussian-color {
    color: var(--gaussian-color) !important;
}

.powerlaw-color {
    color: var(--powerlaw-color) !important;
}

/* ========================================
   LEARN MORE SECTION
   ======================================== */

.learn-more {
    margin-top: 2rem;
}

.expand-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.expand-icon {
    font-size: 1rem;
    font-weight: bold;
    transition: transform var(--transition-fast);
}

.expand-btn.active .expand-icon {
    transform: rotate(45deg);
}

.expandable-content {
    display: none;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
}

.expandable-content.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.expandable-content h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.expandable-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.expandable-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.expandable-content li {
    margin-bottom: 0.5rem;
}

/* ========================================
   TABLES
   ======================================== */

.comparison-table {
    overflow-x: auto;
    margin-bottom: 2rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

thead {
    background-color: var(--bg-tertiary);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

tbody tr:hover {
    background-color: var(--bg-tertiary);
}

.probability-table {
    margin-top: 2rem;
}

.probability-table h4 {
    margin-bottom: 1rem;
}

/* ========================================
   HISTORICAL EVENTS
   ======================================== */

.historical-events {
    margin-top: 2rem;
}

.historical-events h4 {
    margin-bottom: 1rem;
}

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

.event-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--powerlaw-color);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.event-card h5 {
    color: var(--text-primary);
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.event-card .event-sigma {
    color: var(--powerlaw-color);
    font-weight: bold;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.event-card .event-details {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ========================================
   CASCADE VISUALIZATION
   ======================================== */

.cascade-visualization {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.cascade-visualization h4 {
    margin-bottom: 1rem;
}

.cascade-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.cascade-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.cascade-stat .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.cascade-stat .value {
    font-size: 1.5rem;
    font-weight: bold;
    font-family: 'Monaco', 'Menlo', monospace;
}

.cascade-stat .value.warning {
    color: var(--accent-yellow);
}

.cascade-stat .value.danger {
    color: var(--powerlaw-color);
}

/* ========================================
   REGIME INDICATOR
   ======================================== */

.regime-indicator {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.regime-indicator h4 {
    margin-bottom: 1rem;
    text-align: center;
}

.regime-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.regime {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
}

.regime-icon {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.regime-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.regime-meter {
    flex: 1;
    max-width: 200px;
    height: 12px;
    background: linear-gradient(to right, var(--accent-green), var(--accent-yellow), var(--powerlaw-color));
    border-radius: 6px;
    position: relative;
}

.regime-fill {
    position: absolute;
    top: -4px;
    left: 0;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    box-shadow: 0 2px 8px var(--shadow);
    transition: left var(--transition-normal);
}

/* ========================================
   PRICING RESULTS
   ======================================== */

.pricing-results {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.price-card {
    flex: 1;
    min-width: 280px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
}

.price-card h4 {
    margin-bottom: 1rem;
}

.price-card.call {
    border-top: 3px solid var(--accent-green);
}

.price-card.put {
    border-top: 3px solid var(--powerlaw-color);
}

.price-comparison {
    display: flex;
    gap: 1.5rem;
}

.price-model {
    flex: 1;
    text-align: center;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.model-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.price-value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    font-family: 'Monaco', 'Menlo', monospace;
    color: var(--text-primary);
}

.price-model.fat-tail {
    background-color: var(--powerlaw-light);
}

/* ========================================
   MOAT COMPARISON CARDS
   ======================================== */

.comparison-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.moat-card {
    flex: 1;
    min-width: 280px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    text-align: center;
}

.moat-card.wide-moat {
    border-top: 3px solid var(--accent-green);
}

.moat-card.no-moat {
    border-top: 3px solid var(--powerlaw-color);
}

.moat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.moat-stats {
    text-align: left;
    margin-bottom: 1rem;
}

.moat-description {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* Assignment Panel */
.assignment-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.assignment-panel.hidden {
    display: none;
}

.assignment-panel h4 {
    margin-bottom: 1rem;
}

.assignment-comparison {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.assignment-card {
    flex: 1;
    min-width: 200px;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.assignment-card h5 {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.profit {
    color: var(--accent-green) !important;
}

.loss {
    color: var(--powerlaw-color) !important;
}

/* ========================================
   FOOTER
   ======================================== */

footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem;
    text-align: center;
}

.footer-content p {
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    font-size: 0.875rem;
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

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

.animating {
    animation: pulse 1s infinite;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
    #sidebar {
        transform: translateX(-100%);
    }

    #sidebar.open {
        transform: translateX(0);
    }

    #menu-toggle {
        display: flex;
    }

    #main-content {
        margin-left: 0;
    }

    .section {
        padding: 2rem 1.5rem;
    }

    .chart-container.dual {
        flex-direction: column;
    }

    .chart-half {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .controls-panel {
        flex-direction: column;
    }

    .control-group {
        min-width: 100%;
    }

    .stats-panel {
        flex-direction: column;
    }

    .stat-card {
        min-width: 100%;
    }

    .comparison-cards {
        flex-direction: column;
    }

    .moat-card {
        min-width: 100%;
    }

    .pricing-results {
        flex-direction: column;
    }

    .price-card {
        min-width: 100%;
    }

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

    .cascade-stats {
        justify-content: center;
    }

    table {
        font-size: 0.8125rem;
    }

    th, td {
        padding: 0.75rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 1.5rem 1rem;
    }

    .controls-panel {
        padding: 1rem;
    }

    .chart-container {
        padding: 0.5rem;
        min-height: 300px;
    }

    .price-comparison {
        flex-direction: column;
    }
}

/* ========================================
   PLOTLY OVERRIDES
   ======================================== */

.js-plotly-plot .plotly .modebar {
    right: 10px !important;
}

.js-plotly-plot .plotly .modebar-btn path {
    fill: var(--text-secondary) !important;
}

.js-plotly-plot .plotly .modebar-btn:hover path {
    fill: var(--text-primary) !important;
}