/* Robin Hanson Knowledge Graph - Refined Pastel Aesthetic */

:root {
    /* Light pastel theme inspired by Overcoming Bias */
    --bg-primary: #F8F5F0;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F0EDE8;
    --bg-elevated: #FDFCFA;
    
    --text-primary: #1A1A1A;
    --text-secondary: #5C5C5C;
    --text-muted: #8A8A8A;
    
    /* Overcoming Bias color palette */
    --accent-navy: #1E3A5F;
    --accent-rust: #B55A3F;
    --accent-khaki: #C9A66B;
    --accent-green: #2D5A4A;
    --accent-rose: #C4A08A;
    
    /* Node colors - pastel variations */
    --color-article: #1E3A5F;
    --color-person: #B55A3F;
    --color-concept: #C9A66B;
    --color-topic: #2D5A4A;
    --color-organization: #8B7355;
    --color-entity: #A0968C;
    
    /* Edge colors */
    --edge-references: #B55A3F;
    --edge-similar: #1E3A5F;
    --edge-mentions: #2D5A4A;
    --edge-cooccurs: #C9A66B;
    --edge-belongs: #C4A08A;
    
    --border-color: #D8D4CF;
    --border-focus: #1E3A5F;
    
    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Container - dense grid layout */
.container {
    display: grid;
    grid-template-rows: auto auto 1fr auto;
    grid-template-columns: 1fr;
    min-height: 100vh;
    padding: 24px 32px;
    gap: 20px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: #B55A3F; /* Rust red */
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-top: 4px;
}

.stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-navy);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: var(--font-mono);
}

/* Controls */
.controls {
    display: flex;
    gap: 20px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
    align-items: flex-end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-group label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-family: var(--font-mono);
}

.control-group input,
.control-group select {
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.875rem;
    min-width: 150px;
    transition: border-color 0.2s;
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--border-focus);
}

.date-range {
    display: flex;
    align-items: center;
    gap: 8px;
}

.date-range input {
    width: 130px;
}

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

.btn {
    padding: 10px 20px;
    background: var(--accent-navy);
    border: none;
    border-radius: var(--radius-sm);
    color: #FFFFFF;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: #2A4A73;
}

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

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

.control-group input[type="number"] {
    width: 100px;
    min-width: 100px;
}

/* Main content - dense dashboard layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 340px;
    grid-template-rows: 1fr;
    gap: 20px;
    min-height: 0;
}

/* Analytics Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto 1fr;
    gap: 16px;
    min-height: 0;
}

/* Graph container */
.graph-container {
    grid-column: 1 / -1;
    grid-row: 3;
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    min-height: 400px;
}

#graph {
    width: 100%;
    height: 100%;
}

/* Analytics panels */
.analytics-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
}

.panel-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

/* Word Cloud Panel */
.word-cloud-panel {
    grid-column: 1;
    grid-row: 1;
    min-height: 200px;
}

#word-cloud {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#word-cloud text {
    cursor: pointer;
    transition: opacity 0.2s;
}

#word-cloud text:hover {
    opacity: 0.7;
}

/* Concept Dependency Panel */
.concept-dependency-panel {
    grid-column: 2;
    grid-row: 1;
    min-height: 200px;
}

#concept-dependency {
    flex: 1;
    overflow: hidden;
}

/* Analytics Grid - Small Multiples */
.analytics-grid-panel {
    grid-column: 1 / -1;
    grid-row: 2;
}

.small-multiples {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.small-chart {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 12px;
    min-height: 120px;
}

.small-chart-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.small-chart-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-navy);
    margin-bottom: 4px;
}

.small-chart-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.small-chart svg {
    width: 100%;
    height: 60px;
}

/* Horizontal bar chart styles */
.bar-chart-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
}

.bar-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bar-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    width: 80px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bar-track {
    flex: 1;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.bar-value {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    width: 30px;
    text-align: right;
}

/* Donut chart styles */
.donut-container {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 8px;
}

.donut-legend {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.donut-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.donut-legend-color {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

/* Zoom controls */
.zoom-controls {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.zoom-btn {
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zoom-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-navy);
}

/* Side panel */
.side-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.3s, opacity 0.3s;
}

.side-panel.hidden {
    transform: translateX(100%);
    opacity: 0;
    position: absolute;
    right: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: #2D5A4A; /* Green */
}

.close-btn {
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.panel-content {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    min-height: 0;
}

.hint {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 40px 0;
    font-size: 0.9rem;
}

/* Node details in panel */
.node-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.node-type-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 2px;
    font-size: 0.7rem;
    font-weight: 500;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.node-type-badge.article { background: var(--color-article); color: white; }
.node-type-badge.person { background: var(--color-person); color: white; }
.node-type-badge.concept { background: var(--color-concept); color: var(--text-primary); }
.node-type-badge.topic { background: var(--color-topic); color: white; }
.node-type-badge.organization { background: var(--color-organization); color: white; }

.node-label {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 8px;
    line-height: 1.3;
}

.node-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.875rem;
}

.meta-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

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

.meta-value {
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.node-url {
    color: var(--accent-navy);
    text-decoration: none;
    font-size: 0.8rem;
    word-break: break-all;
    transition: color 0.2s;
}

.node-url:hover {
    color: var(--accent-rust);
}

.connections-section {
    margin-top: 16px;
}

.connections-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.connection-count {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 2px;
    font-size: 0.7rem;
    font-family: var(--font-mono);
}

.connections-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
}

.connection-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.connection-item:hover {
    background: var(--bg-primary);
}

.connection-type {
    font-size: 0.6rem;
    padding: 2px 6px;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-family: var(--font-mono);
}

.connection-type.REFERENCES { background: var(--edge-references); color: white; }
.connection-type.SIMILAR_TO { background: var(--edge-similar); color: white; }
.connection-type.MENTIONS { background: var(--edge-mentions); color: white; }
.connection-type.CO_OCCURS { background: var(--edge-cooccurs); color: var(--text-primary); }
.connection-type.BELONGS_TO { background: var(--edge-belongs); color: var(--text-primary); }

.connection-label {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Legend */
.legend {
    position: fixed;
    bottom: 24px;
    left: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    box-shadow: var(--shadow-card);
}

.legend-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.legend-items {
    display: flex;
    gap: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

/* Tooltip */
.tooltip {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.875rem;
    color: var(--text-primary);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    box-shadow: var(--shadow-card);
    max-width: 280px;
    z-index: 1000;
}

.tooltip.visible {
    opacity: 1;
}

.tooltip strong {
    font-family: var(--font-heading);
}

/* Graph node styles */
.node circle {
    stroke-width: 1.5px;
    cursor: pointer;
    transition: stroke-width 0.2s;
}

.node circle:hover {
    stroke-width: 3px;
}

.node.highlighted circle {
    stroke: var(--accent-rust);
    stroke-width: 3px;
}

.node.dimmed {
    opacity: 0.15;
}

.node text {
    font-size: 9px;
    font-family: var(--font-body);
    fill: var(--text-secondary);
    pointer-events: none;
}

.link {
    stroke-opacity: 0.3;
    transition: stroke-opacity 0.2s, stroke-width 0.2s;
}

.link.highlighted {
    stroke-opacity: 0.9;
    stroke-width: 2.5px !important;
}

.link.dimmed {
    stroke-opacity: 0.05;
}

/* Loading state */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-navy);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Arc diagram styles */
.arc-diagram path {
    fill: none;
    stroke-opacity: 0.4;
    transition: stroke-opacity 0.2s;
}

.arc-diagram path:hover {
    stroke-opacity: 0.8;
}

.arc-diagram circle {
    cursor: pointer;
    transition: r 0.2s;
}

.arc-diagram circle:hover {
    r: attr(r) + 2;
}

.arc-diagram text {
    font-family: var(--font-mono);
    font-size: 8px;
    fill: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1400px) {
    .small-multiples {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .side-panel {
        position: fixed;
        right: 20px;
        top: 200px;
        bottom: 80px;
        width: 340px;
        z-index: 100;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .word-cloud-panel,
    .concept-dependency-panel {
        grid-column: 1;
    }
    
    .concept-dependency-panel {
        grid-row: 2;
    }
    
    .analytics-grid-panel {
        grid-row: 3;
    }
    
    .graph-container {
        grid-row: 4;
    }
}

@media (max-width: 900px) {
    .container {
        padding: 16px;
    }
    
    .small-multiples {
        grid-template-columns: 1fr;
    }
    
    .legend {
        display: none;
    }
}

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

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.main-nav.compact {
    padding: 12px 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
    position: relative;
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-navy);
    color: var(--accent-navy);
}

.sidebar-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-rust);
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    font-family: var(--font-mono);
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
    line-height: 1.2;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.nav-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
    border-radius: 4px;
}

.nav-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: #B55A3F; /* Rust red */
}

.nav-title-highlight {
    color: #C9A66B; /* Khaki yellow */
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

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

.nav-link.active {
    color: var(--accent-navy);
    border-color: var(--accent-navy);
    background: var(--bg-tertiary);
}

/* ==========================================
   LANDING PAGE
   ========================================== */

.landing-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.landing-main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 32px;
}

.hero {
    text-align: center;
    margin-bottom: 60px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    color: #B55A3F; /* Rust red */
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.landing-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 80px;
    padding: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.landing-stat {
    text-align: center;
}

.landing-stat-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-navy);
    line-height: 1.2;
}

.landing-stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.feature-card {
    display: flex;
    flex-direction: column;
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: var(--accent-navy);
    box-shadow: var(--shadow-card);
}

.feature-icon {
    color: var(--accent-navy);
    margin-bottom: 20px;
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: #2D5A4A; /* Green */
    margin-bottom: 12px;
}

.feature-description {
    flex: 1;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.feature-cta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-navy);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: #C9A66B; /* Khaki yellow */
    text-align: center;
    margin-bottom: 24px;
}

.topics-preview {
    text-align: center;
}

.topic-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.topic-tag {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.landing-footer {
    padding: 24px 32px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.landing-footer a {
    color: var(--accent-navy);
    text-decoration: none;
}

.landing-footer a:hover {
    text-decoration: underline;
}

/* ==========================================
   GRAPH FULL PAGE
   ========================================== */

.graph-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.graph-controls {
    display: flex;
    gap: 16px;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    align-items: flex-end;
}

.graph-controls .control-group input,
.graph-controls .control-group select {
    padding: 8px 12px;
    min-width: 120px;
}

.graph-controls .control-group input[type="number"] {
    width: 80px;
    min-width: 80px;
}

/* Search Autocomplete */
.search-wrapper {
    position: relative;
}

.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.suggestion {
    padding: 10px 14px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.15s;
}

.suggestion:last-child {
    border-bottom: none;
}

.suggestion:hover {
    background: rgba(30, 58, 95, 0.08);
}

.suggestion-label {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.suggestion-type {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 2px 6px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 3px;
}

.graph-stats {
    margin-left: auto;
    display: flex;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.graph-stat strong {
    color: var(--accent-navy);
}

.graph-fullpage {
    flex: 1;
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
}

.graph-fullpage #graph {
    width: 100%;
    height: 100%;
}

.graph-legend {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    box-shadow: var(--shadow-card);
}

.graph-side-panel {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 360px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s;
}

.graph-side-panel.hidden {
    transform: translateX(100%);
}

/* ==========================================
   NODE PREVIEW SECTION
   ========================================== */

.node-preview-section {
    border-top: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    max-height: 45%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.node-preview-section.hidden {
    display: none;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: var(--accent-navy); /* Solid blue */
    border-bottom: 1px solid var(--border-color);
}

.preview-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: #FFFFFF; /* White text for blue background */
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.preview-toggle {
    width: 24px;
    height: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.preview-toggle:hover {
    background: var(--bg-primary);
    border-color: var(--accent-navy);
    color: var(--text-primary);
}

.preview-content {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

.preview-content.collapsed {
    max-height: 0;
    padding: 0 16px;
    overflow: hidden;
}

.preview-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.loading-spinner.small {
    width: 18px;
    height: 18px;
    border-width: 2px;
}

.preview-text {
    margin-bottom: 16px;
}

.preview-text p {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
    text-align: justify;
}

.preview-text p:last-child {
    margin-bottom: 0;
}

.preview-link {
    color: var(--accent-rust); /* Rust red */
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.preview-link:hover {
    color: #9A4832; /* Darker rust red on hover */
    text-decoration: underline;
}

.preview-keywords {
    margin-top: 12px;
}

.keywords-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.keywords-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.keyword-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--accent-navy);
    transition: all 0.2s;
}

.keyword-tag:hover {
    background: var(--accent-navy);
    color: white;
    border-color: var(--accent-navy);
}

.preview-summary {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.summary-intro {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.summary-intro strong {
    color: var(--accent-navy);
}

.preview-connection-group {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    border-left: 3px solid var(--accent-khaki);
}

.connection-group-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.connection-group-items {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.preview-conn-item {
    display: inline-block;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.preview-conn-item:hover {
    background: var(--accent-navy);
    color: white;
}

.preview-conn-item.article {
    border-left: 2px solid var(--color-article);
}

.preview-conn-item.person {
    border-left: 2px solid var(--color-person);
}

.preview-conn-item.concept {
    border-left: 2px solid var(--color-concept);
}

.preview-conn-item.topic {
    border-left: 2px solid var(--color-topic);
}

.preview-conn-item.organization {
    border-left: 2px solid var(--color-organization);
}

.more-indicator {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-style: italic;
    padding: 4px 6px;
}

.preview-empty,
.preview-error {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    padding: 16px;
    font-style: italic;
}

.preview-error {
    color: var(--accent-rust);
}

/* ==========================================
   ANALYTICS PAGE
   ========================================== */

.analytics-page {
    min-height: 100vh;
}

.analytics-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 32px;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 18px 16px;
    text-align: center;
}

.stat-card-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-navy);
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-card-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.analytics-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
}

.analytics-section .section-title {
    text-align: left;
    font-size: 1.125rem;
    font-family: var(--font-heading);
    font-weight: 600;
    margin-bottom: 8px;
    color: #B55A3F; /* Rust red */
}

.section-description {
    font-size: 0.875rem;
    font-family: var(--font-body);
    color: var(--text-muted);
    margin-top: 20px;
    line-height: 1.6;
}

.section-description p {
    margin: 0 0 12px 0;
}

.section-description p:last-child {
    margin-bottom: 0;
}

.word-cloud-large {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Word Cloud Selector */
.section-header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 16px;
}

.wordcloud-selector {
    flex-shrink: 0;
}

.wordcloud-dropdown {
    padding: 10px 36px 10px 16px;
    background: #F5F3EE;
    border: 1px solid #E0DDD6;
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C5C5C' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: all 0.2s ease;
    min-width: 130px;
}

.wordcloud-dropdown:hover {
    background-color: #EBE8E1;
    border-color: #D0CCC4;
}

.wordcloud-dropdown:focus {
    outline: none;
    border-color: var(--accent-navy);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.wordcloud-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 20px;
    margin-bottom: 12px;
    padding: 10px 16px;
    background: rgba(248, 245, 240, 0.6);
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 0.75rem;
}

.wordcloud-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

.wordcloud-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.arc-diagram-container {
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.timeline-chart {
    min-height: 200px;
}

.analytics-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.analytics-grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.bar-chart-vertical {
    min-height: 250px;
}

.donut-chart-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.chart-legend {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.chart-legend .legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.chart-legend .legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.people-chart,
.edge-types-chart {
    min-height: 300px;
}

/* Chart containers */
.chart-container {
    min-height: 250px;
    position: relative;
}

.chart-container-wide {
    min-height: 300px;
    position: relative;
}

.heatmap-container {
    min-height: 350px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10px;
}

.markov-wrapper {
    display: flex;
    gap: 0;
    align-items: flex-start;
    width: 100%;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
}

.markov-chain-container {
    min-height: 600px;
    height: 600px;
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 10px;
    overflow: visible;
}

.markov-details-panel {
    width: 380px;
    height: 600px;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.markov-details-panel.hidden {
    display: none;
}

.markov-details-panel .panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: var(--bg-secondary);
}

.markov-details-panel .panel-header h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-navy);
    margin: 0;
}

.markov-details-panel .close-btn {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-muted);
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.markov-details-panel .close-btn:hover {
    background: rgba(45, 90, 74, 0.1);
    color: #2D5A4A;
}

.markov-details-panel .panel-content {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
}

.markov-details-panel .hint {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 40px 20px;
    font-size: 0.85rem;
}

.markov-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.markov-stat-card {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 4px;
}

.markov-stat-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.markov-stat-value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-navy);
    line-height: 1.2;
}

/* Markov Chain Side Panel */
.markov-side-panel {
    position: fixed;
    right: 0;
    top: 64px;
    bottom: 0;
    width: 380px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    box-shadow: -8px 0 24px rgba(0,0,0,0.12);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.markov-side-panel.hidden {
    transform: translateX(100%);
}

.markov-side-panel .panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.markov-side-panel .panel-header h2 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: #B55A3F;
    margin: 0;
}

.markov-side-panel .close-btn {
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.markov-side-panel .close-btn:hover {
    background: var(--accent-rust);
    color: white;
    border-color: var(--accent-rust);
}

.markov-side-panel .panel-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

/* Markov Node Stats */
.markov-node-stats {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-navy);
}

/* Markov Transitions Sections */
.markov-transitions-section {
    margin-bottom: 20px;
}

.markov-transitions-section .transitions-title {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-navy);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.markov-transitions-section .transitions-list {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.markov-transitions-section .transition-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    transition: all 0.15s;
    cursor: pointer;
}

.markov-transitions-section .transition-item:hover {
    background: rgba(30, 58, 95, 0.08);
}

.markov-transitions-section .transition-label {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--text-primary);
    flex: 1;
    margin-right: 12px;
    line-height: 1.4;
}

.markov-transitions-section .transition-weight {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-navy);
    flex-shrink: 0;
}

.transition-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.transition-strength {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Mini stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 10px 0;
}

.mini-stat {
    text-align: center;
    padding: 16px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.mini-stat-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-navy);
    line-height: 1.3;
    margin-bottom: 4px;
}

.mini-stat-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Concept clusters */
.clusters-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.cluster-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 16px;
    border-left: 4px solid var(--accent-navy);
}

.cluster-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.cluster-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.cluster-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-family: var(--font-body);
}

.cluster-more {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-style: italic;
    padding: 4px;
}

/* ==========================================
   CHAT PAGE
   ========================================== */

.chat-page {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.chat-main {
    flex: 1;
    display: flex;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    padding: 24px;
    gap: 24px;
    overflow: hidden;
    transition: margin-left 0.3s ease;
}

.chat-main.sidebar-open {
    margin-left: 320px;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 85%;
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.assistant {
    align-self: flex-start;
}

.message-avatar {
    width: 36px;
    height: 36px;
    background: var(--accent-navy);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 50%;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--accent-rust);
}

.message-content {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    line-height: 1.7;
}

.message.user .message-content {
    background: var(--accent-navy);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background: var(--bg-tertiary);
    color: #1A1A1A;
    border-bottom-left-radius: 4px;
}

.message-content p {
    margin-bottom: 12px;
    color: #1A1A1A;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul, .message-content ol {
    margin: 12px 0;
    padding-left: 24px;
    color: #1A1A1A;
}

.message-content li {
    margin-bottom: 6px;
    color: #1A1A1A;
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
    color: #B55A3F;
    margin-bottom: 8px;
}

.message-content strong {
    color: #B55A3F;
}

.message.user .message-content strong {
    color: white;
}

.message-content code {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.message-content blockquote {
    border-left: 3px solid var(--accent-khaki);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.sources-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: #1A1A1A;
    cursor: pointer;
    transition: all 0.2s;
}

.sources-btn:hover {
    background: #FAF8F5;
    border-color: var(--accent-rust);
    color: #1A1A1A;
}

.suggested-questions {
    padding: 12px 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    border-top: 1px solid var(--border-color);
}

.suggestion-btn {
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: #1A1A1A;
    cursor: pointer;
    transition: all 0.2s;
}

.suggestion-btn:hover {
    background: #FAF8F5;
    border-color: var(--accent-rust);
    color: #1A1A1A;
}

.chat-input-container {
    display: flex;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
}

.chat-input {
    flex: 1;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text-primary);
}

.chat-input:focus {
    outline: none;
    border-color: var(--accent-navy);
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.send-btn {
    width: 48px;
    height: 48px;
    background: var(--accent-navy);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.send-btn:hover {
    background: #2A4A73;
}

.send-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

.sources-panel {
    width: 380px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    box-shadow: -8px 0 24px rgba(0,0,0,0.12);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: fixed;
    top: 64px;
    right: 0;
    height: calc(100vh - 64px);
    z-index: 1000;
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
}

.sources-panel.hidden {
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.sources-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sources-header h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: #B55A3F; /* Rust */
}

.sources-list {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.source-item {
    display: block;
    padding: 14px 12px;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.source-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0,0,0,0.1);
    border-color: #B55A3F;
}

.source-header {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 4px;
}

.source-index {
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.source-title {
    font-weight: 600;
    color: #B55A3F;
    font-size: 0.95rem;
    margin-bottom: 4px;
    text-decoration: none;
}

.source-title:hover {
    color: #9A4832;
    text-decoration: underline;
}

.source-date {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.source-snippet {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-top: 6px;
}

.source-graph {
    margin-top: 10px;
    border-top: 1px dashed var(--border-color);
    padding-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.graph-node {
    padding: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.graph-node-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-green);
    margin-bottom: 6px;
}

.graph-neighbors {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.graph-neighbor-pill {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.8rem;
    color: #B55A3F;
    text-decoration: none;
    transition: border-color 0.15s ease, transform 0.15s ease, color 0.15s ease;
}

.graph-neighbor-pill:hover {
    border-color: #B55A3F;
    color: #9A4832;
    transform: translateY(-1px);
}

.status-log {
    margin-bottom: 10px;
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.status-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

.status-line.completed {
    color: var(--accent-green);
}

.status-line.running {
    color: var(--accent-khaki);
}

.status-check {
    margin-left: 10px;
    font-weight: 600;
    color: var(--accent-green);
}

.status-spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 10px;
    border: 2px solid var(--accent-khaki);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.error-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.error-hint code {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
}

/* Loading dots animation */
.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ==========================================
   CONVERSATIONS SIDEBAR
   ========================================== */

.conversations-sidebar {
    position: fixed;
    left: 0;
    top: 64px;
    bottom: 0;
    width: 320px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 999;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.08);
}

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

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: #B55A3F;
    margin: 0;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-navy);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
}

.new-chat-btn:hover {
    background: #2A4A73;
    transform: scale(1.05);
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.conversation-item {
    display: flex;
    flex-direction: column;
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.conversation-item:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-navy);
}

.conversation-item.active {
    background: var(--bg-elevated);
    border-color: var(--accent-rust);
    box-shadow: 0 2px 8px rgba(181, 90, 63, 0.15);
}

.conversation-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 6px;
}

.conversation-title {
    flex: 1;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    border: none;
    background: transparent;
    padding: 2px 4px;
    border-radius: 2px;
    cursor: text;
    min-width: 0;
}

.conversation-title:focus {
    outline: 2px solid var(--accent-navy);
    outline-offset: 2px;
    background: var(--bg-secondary);
}

.conversation-title:not(:focus) {
    cursor: pointer;
}

.conversation-delete-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    border-radius: 2px;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s;
    padding: 0;
    flex-shrink: 0;
}

.conversation-item:hover .conversation-delete-btn {
    opacity: 1;
}

.conversation-delete-btn:hover {
    background: var(--accent-rust);
    color: white;
}

.conversation-preview {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    margin-bottom: 4px;
}

.conversation-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.conversation-date {
    font-size: 0.7rem;
}

.conversation-count {
    font-size: 0.7rem;
    padding: 2px 6px;
    background: var(--bg-primary);
    border-radius: 10px;
}

.empty-conversations {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.empty-conversations p {
    margin-bottom: 12px;
}

/* Responsive sidebar */
@media (max-width: 768px) {
    .conversations-sidebar {
        width: 280px;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    }
    
    .chat-main.sidebar-open {
        margin-left: 0;
    }
    
    .conversations-sidebar.sidebar-open {
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
    }
}

/* Responsive for new pages */
@media (max-width: 1200px) {
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .landing-stats {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .analytics-grid-2col,
    .analytics-grid-3col {
        grid-template-columns: 1fr;
    }
    
    .stats-row {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .clusters-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .chat-main {
        padding: 12px;
    }
    
    .sources-panel {
        display: none;
    }
    
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .graph-controls {
        gap: 8px;
        padding: 8px 12px;
    }
    
    .graph-stats {
        display: none;
    }
    
    .clusters-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   INTERACTIVE CHART STYLES
   ========================================== */

/* Tooltip */
.chart-tooltip {
    position: fixed;
    padding: 10px 14px;
    background: rgba(45, 90, 74, 0.9); /* Green from color palette with transparency */
    color: #F8F5F0; /* Off-white for content */
    border-radius: 4px;
    font-size: 12px;
    font-family: 'IBM Plex Mono', monospace;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 280px;
    line-height: 1.5;
    transition: opacity 0.15s ease;
}

.chart-tooltip .tooltip-title {
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 6px;
    color: #FFFFFF; /* White for title */
    text-transform: capitalize;
}

.chart-tooltip .tooltip-value {
    font-size: 11px;
    color: #F8F5F0; /* Off-white for content */
    opacity: 0.95;
}

.chart-tooltip .tooltip-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 4px;
    color: #F8F5F0; /* Off-white for content */
}

.chart-tooltip .tooltip-row span {
    color: #F8F5F0; /* Off-white for content */
}

/* Chart Legend */
.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 0;
    justify-content: center;
}

.chart-legend.legend-vertical {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s ease;
    font-size: 0.75rem;
    font-family: var(--font-body);
    color: var(--text-secondary);
}

.legend-item:hover {
    background: rgba(201, 166, 107, 0.15);
}

.legend-item.dimmed {
    opacity: 0.4;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

.legend-color.circle {
    border-radius: 50%;
}

.legend-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

/* Legend positioning */
.chart-legend.legend-right {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 8px;
    background: rgba(248, 245, 240, 0.9);
    border-radius: 4px;
    z-index: 10;
}

.chart-legend.legend-bottom {
    position: relative;
    margin-top: 16px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    padding: 12px 16px;
    background: rgba(248, 245, 240, 0.6);
    border-radius: 6px;
}

.chart-legend.legend-top {
    position: absolute;
    top: 10px;
    right: 10px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 8px;
    background: rgba(248, 245, 240, 0.9);
    border-radius: 4px;
    z-index: 10;
}

/* Interactive states for chart elements */
.chart-element-dimmed {
    opacity: 0.2 !important;
    transition: opacity 0.2s ease;
}

.chart-element-highlighted {
    opacity: 1 !important;
    transition: opacity 0.2s ease;
}

/* Chord diagram specific */
.chord-diagram {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.chord-diagram .chord-path {
    transition: opacity 0.2s ease;
}

.chord-diagram .chord-path:hover {
    opacity: 1 !important;
}

.chord-diagram .node-arc {
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.chord-diagram .node-arc:hover {
    filter: brightness(1.1);
}

/* Stacked bar chart */
.stacked-bar-segment {
    transition: opacity 0.2s ease;
    cursor: pointer;
}

.stacked-bar-segment:hover {
    filter: brightness(1.15);
}

/* Year legend for stacked bars */
.year-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    justify-content: center;
    max-height: 80px;
    overflow-y: auto;
}

.year-legend .legend-item {
    font-size: 10px;
    padding: 3px 6px;
}

/* ============================================
   Chat Controls & Slider
   ============================================ */

.chat-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

/* Query Info Badge (replaces slider) */
.query-info-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    margin: 8px 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.query-info-badge.hidden {
    display: none;
}

.show-sources-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--accent-navy);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 12px;
}

.show-sources-btn:hover {
    background: #2A4A73;
    transform: translateY(-1px);
}

.show-sources-btn svg {
    width: 14px;
    height: 14px;
}

.query-info-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
    opacity: 0.7;
}

#query-info-text {
    color: var(--text-muted);
}

.sources-slider-control {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 16px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.sources-slider-control label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.slider-icon-img {
    width: 22px;
    height: 22px;
    object-fit: contain;
    opacity: 0.85;
    transition: opacity 0.2s;
}

.sources-slider-control:hover .slider-icon-img {
    opacity: 1;
}

.slider-label-text {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.slider-value {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
    min-width: 26px;
    text-align: center;
}

.top-k-slider {
    width: 100px;
    height: 3px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 2px;
    cursor: pointer;
}

.top-k-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 10px;
    height: 10px;
    background: #a63d2f;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.top-k-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 8px rgba(166, 61, 47, 0.5);
}

.top-k-slider::-moz-range-thumb {
    width: 10px;
    height: 10px;
    background: #a63d2f;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

/* ============================================
   Citation Links
   ============================================ */

.citation-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #B55A3F, #9A4832);
    color: #FFFFFF !important;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    text-decoration: none !important;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    margin: 0 3px;
    vertical-align: baseline;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.citation-link:hover {
    background: linear-gradient(135deg, #9A4832, #B55A3F);
    transform: scale(1.15);
    box-shadow: 0 2px 10px rgba(181, 90, 63, 0.5);
}

.citation-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 1px solid #B55A3F;
    border-radius: 10px;
    padding: 14px 18px;
    min-width: 280px;
    max-width: 380px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s, visibility 0.15s, transform 0.15s;
    pointer-events: none;
    text-align: left;
}

.citation-link:hover .citation-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-3px);
}

.citation-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 10px solid transparent;
    border-top-color: #B55A3F;
}

.citation-tooltip-title {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 6px;
    line-height: 1.4;
    font-family: var(--font-serif);
}

.citation-tooltip-date {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.citation-tooltip-link {
    display: block;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
    color: var(--accent-secondary);
    font-size: 0.8rem;
    text-decoration: none;
    font-weight: 500;
}

/* ============================================
   Inline Sources List
   ============================================ */

.inline-sources {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.inline-sources-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.inline-source-item {
    display: block;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 8px;
    color: #B55A3F;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.inline-source-item:hover {
    background: var(--bg-tertiary);
    border-color: #B55A3F;
    color: #9A4832;
}

.inline-source-item strong {
    color: #B55A3F;
    margin-right: 6px;
}