/* ==========================================================================
   Crumball - Editorial Style CSS
   Inspired by The Pudding, NYT Graphics, and data journalism aesthetics
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Colors - Warm, editorial palette */
    --color-text: #1a1a1a;
    --color-text-secondary: #666;
    --color-text-muted: #999;
    --color-background: #fafafa;
    --color-surface: #fff;
    --color-border: #e5e5e5;
    --color-accent: #d4a373;
    --color-accent-dark: #bc8c5f;

    /* Heatmap colors - Cookie-inspired warm gradient */
    --heatmap-empty: #f5f5f5;
    --heatmap-low: #fae5d3;
    --heatmap-mid: #e8b896;
    --heatmap-high: #d4a373;
    --heatmap-max: #8b5a2b;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Layout */
    --container-width: 720px;
    --container-wide: 1100px;
    --header-height: 80px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
    font-family: var(--font-sans);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin: 0 0 var(--space-md);
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin: 0 0 var(--space-md);
}

a {
    color: var(--color-accent-dark);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.lead {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-wide {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    padding: var(--space-xl) 0 var(--space-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-surface);
}

.site-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 4rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text);
}

.site-title-link {
    color: inherit;
    text-decoration: none;
}

.site-title-link:hover {
    color: inherit;
}

.site-title-link .site-title {
    color: var(--color-text);
}

.site-subtitle {
    font-family: var(--font-sans);
    font-style: normal;
    font-weight: 400;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: 0.125rem;
}

.site-byline {
    font-family: var(--font-sans);
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.site-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    padding: var(--space-sm) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    border-bottom-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
    padding: var(--space-xl) 0;
}

.intro {
    margin-bottom: var(--space-xl);
    text-align: center;
}

.intro .lead {
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Controls
   -------------------------------------------------------------------------- */
.controls {
    margin-bottom: var(--space-xl);
}

.search-wrapper {
    max-width: 300px;
    margin: 0 auto var(--space-md);
}

.search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-surface);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(212, 163, 115, 0.15);
}

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

/* --------------------------------------------------------------------------
   Heatmap Visualization
   -------------------------------------------------------------------------- */
.visualization {
    margin-bottom: var(--space-2xl);
}

.visualization h2 {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.viz-intro {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-md);
}

.visualization .search-wrapper {
    max-width: 300px;
    margin: 0 auto var(--space-md);
}

/* Visualization Toolbar (legend + zoom controls) */
.viz-toolbar {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.zoom-slider {
    width: 120px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.15s ease;
}

.zoom-slider::-webkit-slider-thumb:hover {
    background: var(--color-accent-dark);
}

.zoom-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.15s ease;
}

.zoom-slider::-moz-range-thumb:hover {
    background: var(--color-accent-dark);
}

/* Legend */
.heatmap-legend {
    display: flex;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.legend-section {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.legend-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.legend-swatch {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.legend-swatch--empty {
    background-color: var(--heatmap-empty);
    border: 1px solid var(--color-border);
}

.legend-swatch--filled {
    background-color: var(--heatmap-high);
}

.legend-swatch--forecast {
    background-color: var(--heatmap-mid);
    opacity: 0.6;
    border: 2px dashed var(--heatmap-high);
}

.heatmap-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-sm);
    height: 70vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.placeholder-text {
    text-align: center;
    color: var(--color-text-muted);
    font-style: italic;
    padding: var(--space-2xl) 0;
}

/* --------------------------------------------------------------------------
   Placeholder / Coming Soon Sections
   -------------------------------------------------------------------------- */
.placeholder-section {
    margin-bottom: var(--space-xl);
}

.coming-soon {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-xl);
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.coming-soon h2 {
    margin-bottom: var(--space-md);
    color: var(--color-accent-dark);
}

.coming-soon p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.coming-soon ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.coming-soon li {
    padding: var(--space-sm) 0;
    padding-left: var(--space-lg);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.coming-soon li:last-child {
    border-bottom: none;
}

.coming-soon li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* Heatmap cell styling (for D3) */
.heatmap-cell {
    transition: opacity 0.15s ease;
}

.heatmap-cell:hover {
    stroke: var(--color-text);
    stroke-width: 2px;
}

/* Forecast cells - dashed borders, reduced opacity */
.heatmap-cell--forecast {
    opacity: 0.6;
    stroke: var(--heatmap-high);
    stroke-width: 2px;
    stroke-dasharray: 4 2;
}

.heatmap-cell--forecast:hover {
    opacity: 0.85;
    stroke: var(--color-text);
}

/* Today marker - vertical divider between history and forecast */
.heatmap-today-marker {
    stroke: var(--color-text);
    stroke-width: 2px;
    opacity: 0.4;
}

.heatmap-today-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    fill: var(--color-text-secondary);
}

/* Barcode timeline layout - 4-quadrant grid with frozen headers */
.barcode-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    flex: 1;
    min-height: 0; /* Allow grid to shrink within flex container */
}

.barcode-corner {
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    z-index: 20;
}

.barcode-time-axis {
    overflow: hidden;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    z-index: 10;
}

.barcode-labels {
    overflow: hidden;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    z-index: 10;
}

.barcode-ticks {
    overflow: auto;
}

.barcode-corner svg,
.barcode-time-svg,
.barcode-labels-svg,
.barcode-ticks-svg {
    display: block;
}

.barcode-labels-svg .cookie-label,
.barcode-time-svg .year-label,
.barcode-time-svg .month-label,
.barcode-time-svg .week-label {
    font-family: var(--font-sans);
    user-select: none;
}


/* Navigation indicators for off-screen data */
.barcode-labels-svg .nav-indicator {
    font-family: var(--font-sans);
    user-select: none;
    transition: opacity 0.15s ease, fill 0.15s ease;
}

.barcode-labels-svg .nav-indicator:hover {
    fill: var(--color-accent-dark);
}

/* Legacy heatmap styles */
.heatmap-svg {
    display: block;
}

.heatmap-svg .heatmap-cell {
    transition: opacity 0.1s ease;
}

.heatmap-svg .heatmap-cell:hover {
    opacity: 0.8;
}

/* Tooltip */
.tooltip {
    position: absolute;
    pointer-events: none;
    background-color: var(--color-text);
    color: var(--color-surface);
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    font-size: 0.875rem;
    max-width: 250px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.tooltip.visible {
    opacity: 1;
}

.tooltip-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.tooltip-date {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8125rem;
}

/* --------------------------------------------------------------------------
   Insights Section
   -------------------------------------------------------------------------- */
.insights {
    text-align: center;
}

.insights h2 {
    margin-bottom: var(--space-xl);
}

.insight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    max-width: 700px;
    margin: 0 auto;
}

.insight-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.insight-number {
    font-family: var(--font-sans);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.insight-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    padding: var(--space-xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface);
}

.site-footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.site-footer p:last-child {
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    :root {
        --space-xl: 3rem;
        --space-2xl: 4rem;
    }

    .site-title {
        font-size: 3rem;
    }

    .lead {
        font-size: 1rem;
    }

    .insight-number {
        font-size: 2rem;
    }

    .viz-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .heatmap-legend {
        justify-content: center;
    }

    .zoom-controls {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 2.5rem;
    }

    .site-subtitle {
        font-size: 1rem;
    }

    .site-byline {
        font-size: 0.8125rem;
    }

    .nav-link {
        font-size: 0.8125rem;
    }
}

/* --------------------------------------------------------------------------
   Scatter Plot - Frequency vs Recency
   -------------------------------------------------------------------------- */
.scatter-section {
    margin-bottom: var(--space-2xl);
    text-align: center;
}

.scatter-section h2 {
    margin-bottom: var(--space-sm);
}

.scatter-intro {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.scatter-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
    margin-bottom: var(--space-lg);
}

.scatter-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.scatter-swatch {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.scatter-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 500px;
}

.scatter-svg {
    display: block;
}

.scatter-axis text {
    font-family: var(--font-sans);
    font-size: 11px;
    fill: var(--color-text-secondary);
}

.scatter-axis line,
.scatter-axis path {
    stroke: var(--color-border);
}

.scatter-axis-label {
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    fill: var(--color-text-secondary);
}

.scatter-dot {
    cursor: pointer;
    transition: opacity 0.15s ease, r 0.15s ease;
}

.scatter-dot:not(.scatter-dot--dimmed):hover {
    opacity: 1 !important;
    r: 8;
}

.scatter-dot--dimmed {
    cursor: default;
}

.scatter-dot--highlighted {
    filter: drop-shadow(0 0 4px currentColor);
}

.scatter-annotation {
    transition: opacity 0.15s ease;
}

.scatter-annotation--dimmed {
    opacity: 0.15;
}

.scatter-annotation--highlighted .scatter-annotation-name {
    font-weight: 700;
}

.scatter-search-wrapper {
    max-width: 300px;
    margin: 0 auto var(--space-md);
}

.scatter-tooltip {
    position: absolute;
    pointer-events: none;
    background-color: var(--color-text);
    color: var(--color-surface);
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    font-size: 0.875rem;
    max-width: 280px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.scatter-tooltip.visible {
    opacity: 1;
}

.scatter-tooltip-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.scatter-tooltip-stats {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* Scatter plot annotations for outliers */
.scatter-annotations {
    pointer-events: none;
}

.scatter-annotation-line {
    stroke-linecap: round;
}

.scatter-annotation-name {
    font-family: var(--font-sans);
}

.scatter-annotation-value {
    font-family: var(--font-sans);
}

.scatter-annotation-anchor {
    font-family: var(--font-sans);
}

/* Log scale axis styling */
.scatter-axis-y .tick line {
    stroke: var(--color-border);
    opacity: 0.5;
}

@media (max-width: 768px) {
    .scatter-legend {
        gap: var(--space-sm) var(--space-md);
    }

    .scatter-legend-item {
        font-size: 0.8125rem;
    }

    .scatter-container {
        min-height: 400px;
    }
}

/* --------------------------------------------------------------------------
   Prototypes Page
   -------------------------------------------------------------------------- */
.proto-section {
    margin-bottom: var(--space-2xl);
}

.proto-section > h2 {
    text-align: center;
    margin-bottom: var(--space-sm);
}

.proto-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.proto-header h2 {
    margin-bottom: var(--space-sm);
}

.proto-description {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-link {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-lg);
}


.section-link a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.section-link a:hover {
    text-decoration: underline;
}

.proto-controls {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.proto-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.proto-label > span:first-child {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.proto-select {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-surface);
    cursor: pointer;
    max-width: 300px;
}

.proto-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.proto-slider {
    width: 120px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.proto-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
}

.proto-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.proto-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 500px;
    overflow: hidden;
}

.proto-container--wide {
    overflow-x: auto;
}

.proto-container--tall {
    min-height: 650px;
}

/* Radial Chart */
.radial-svg {
    display: block;
}

.radial-month-label {
    font-family: var(--font-sans);
}

.radial-year-label {
    font-family: var(--font-sans);
}

.radial-appearance {
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.radial-center-label {
    font-family: var(--font-sans);
}

.radial-center-sublabel {
    font-family: var(--font-sans);
}

.radial-title {
    font-family: var(--font-sans);
}

/* Bump Chart */
.bump-svg {
    display: block;
}

.bump-axis text {
    font-family: var(--font-sans);
    font-size: 11px;
    fill: var(--color-text-secondary);
}

.bump-axis line,
.bump-axis path {
    stroke: var(--color-border);
}

.bump-axis-label {
    font-family: var(--font-sans);
}

.bump-line {
    transition: opacity 0.2s ease, stroke-width 0.2s ease;
}

.bump-label {
    font-family: var(--font-sans);
    pointer-events: none;
}

.bump-count {
    font-family: var(--font-sans);
    pointer-events: none;
}

.bump-dot {
    pointer-events: none;
}

/* Network Graph */
.network-svg {
    display: block;
}

.network-link {
    pointer-events: none;
}

.network-node {
    cursor: pointer;
}

.network-node circle {
    transition: opacity 0.2s ease, fill 0.2s ease;
}

.network-label {
    font-family: var(--font-sans);
    pointer-events: none;
}

.network-stats text {
    font-family: var(--font-sans);
}

/* Diversity Timeline */
.diversity-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
    margin-bottom: var(--space-lg);
}

.diversity-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.diversity-swatch {
    width: 14px;
    height: 14px;
    border-radius: 2px;
}

.diversity-swatch--pattern {
    background: #fff;
    border: 2px solid #333;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.diversity-svg {
    display: block;
}

.diversity-axis text {
    font-family: var(--font-sans);
    font-size: 11px;
    fill: var(--color-text-secondary);
}

.diversity-axis line,
.diversity-axis path {
    stroke: var(--color-border);
}

.diversity-axis-label {
    font-family: var(--font-sans);
}

.diversity-area {
    transition: opacity 0.2s ease;
}

.diversity-new-marker {
    pointer-events: none;
}

.diversity-annotations text {
    font-family: var(--font-sans);
}

/* Treemap */
.treemap-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
}

.treemap-crumb {
    color: var(--color-accent-dark);
    cursor: pointer;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    transition: background 0.15s ease;
}

.treemap-crumb:hover {
    background: rgba(212, 163, 115, 0.15);
}

.treemap-crumb--current {
    color: var(--color-text);
    cursor: default;
    font-weight: 600;
}

.treemap-crumb--current:hover {
    background: none;
}

.treemap-separator {
    color: var(--color-text-muted);
}

.treemap-svg {
    display: block;
}

.treemap-rect {
    transition: opacity 0.15s ease;
}

.treemap-label {
    font-family: var(--font-sans);
    pointer-events: none;
}

.treemap-value {
    font-family: var(--font-sans);
    pointer-events: none;
}

/* Family Tree */
.family-svg {
    display: block;
}

.family-arc {
    transition: opacity 0.15s ease;
}

.family-label {
    font-family: var(--font-sans);
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.family-group text {
    font-family: var(--font-sans);
}

.family-cookie {
    transition: opacity 0.15s ease;
    cursor: pointer;
}

.family-cookie-label {
    font-family: var(--font-sans);
    pointer-events: none;
    text-shadow: 0 1px 1px rgba(0,0,0,0.2);
}

/* Week Browser */
.browser-timeline {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px 16px 0 0;
    padding: var(--space-sm) 0;
    overflow: hidden;
}

.browser-timeline-svg {
    display: block;
}

.browser-tick {
    transition: fill 0.15s ease, opacity 0.15s ease;
}

.browser-year-label {
    font-family: var(--font-sans);
}

.browser-today-label {
    font-family: var(--font-sans);
}

.browser-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
}

.browser-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-background);
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--color-text);
    transition: all 0.15s ease;
}

.browser-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.browser-btn:active {
    transform: scale(0.95);
}

.browser-date-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    min-width: 200px;
}

.browser-week-label {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
}

.browser-date-picker {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    border: none;
    background: transparent;
    cursor: pointer;
    padding: var(--space-xs);
}

.browser-date-picker::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.6;
}

.browser-menu {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 16px 16px;
    padding: var(--space-lg);
}

.browser-menu-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.browser-menu-count {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.browser-menu-new {
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: var(--color-accent-dark);
    padding: 2px 8px;
    border-radius: 4px;
}

.browser-menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.browser-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-background);
    border-radius: 16px;
    border-left: 4px solid var(--color-accent);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.browser-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.browser-item--cookie {
    border-left-color: #d4a373;
}

.browser-item--ncd {
    border-left-color: #8b5a2b;
}

.browser-item--lto {
    border-left-color: #e8b896;
}

.browser-item-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    background: var(--color-surface);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-secondary);
}

.browser-item-content {
    flex: 1;
    min-width: 0;
}

.browser-item-name {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: var(--space-xs);
}

.browser-item-badges {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.browser-badge {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    border-radius: 3px;
}

.browser-badge--new {
    background: #27AE60;
    color: #fff;
}

.browser-badge--type {
    background: var(--color-border);
    color: var(--color-text-secondary);
}

.browser-menu-footer {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.browser-stat {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .browser-menu-grid {
        grid-template-columns: 1fr;
    }

    .browser-date-display {
        min-width: 150px;
    }

    .browser-week-label {
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .proto-controls {
        flex-direction: column;
        align-items: center;
    }

    .proto-select {
        width: 100%;
        max-width: none;
    }

    .proto-container {
        min-height: 400px;
    }

    .proto-container--tall {
        min-height: 500px;
    }

    .diversity-legend {
        gap: var(--space-sm) var(--space-md);
    }
}

/* --------------------------------------------------------------------------
   Visualization Footer (watermark + legend)
   -------------------------------------------------------------------------- */
.viz-footer {
    width: 100%;
    margin-top: auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.viz-watermark {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 2px;
}

.viz-subtitle {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--color-muted);
    text-align: center;
    margin-bottom: var(--space-sm);
}

.viz-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
}

.viz-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

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

.viz-legend-swatch--square {
    border-radius: 2px;
    width: 14px;
    height: 14px;
}

@media (max-width: 768px) {
    .viz-footer {
        padding-top: var(--space-sm);
    }

    .viz-watermark {
        font-size: 0.75rem;
    }

    .viz-subtitle {
        font-size: 0.625rem;
    }

    .viz-legend {
        gap: var(--space-sm) var(--space-md);
    }
}

/* --------------------------------------------------------------------------
   Sankey Diagram
   -------------------------------------------------------------------------- */
.sankey-footer {
    width: 100%;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.sankey-footer-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.sankey-watermark {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 2px;
}

.sankey-subtitle {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--color-muted);
    text-align: center;
    margin-bottom: var(--space-md);
}

.sankey-stats {
    display: inline-flex;
    justify-content: center;
    gap: var(--space-xl);
}

.sankey-stat {
    text-align: center;
    flex: 1 1 0;
    min-width: 0;
}

.sankey-stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
}

.sankey-stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sankey-examples {
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.sankey-examples h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--space-md) 0;
    color: var(--color-text);
}

.sankey-examples-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.sankey-example {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-background);
    border-radius: 4px;
    font-size: 0.875rem;
}

.sankey-example-raw {
    flex: 1;
    font-family: monospace;
    color: var(--color-text-secondary);
    word-break: break-all;
}

.sankey-example-arrow {
    color: var(--color-text-muted);
    font-size: 1.25rem;
}

.sankey-example-clean {
    flex: 1;
    font-weight: 500;
    color: var(--color-text);
}

@media (max-width: 768px) {
    .sankey-stats {
        flex-direction: column;
        gap: var(--space-md);
    }

    .sankey-example {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .sankey-example-arrow {
        transform: rotate(90deg);
        align-self: center;
    }
}

.sankey-example-reason {
    flex-basis: 100%;
    font-size: 0.75rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* --------------------------------------------------------------------------
   Pulse Constellation
   -------------------------------------------------------------------------- */
.pulse-container {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 500px;
}

.pulse-dot {
    cursor: pointer;
    transition: filter 0.15s ease, opacity 0.15s ease;
}

.pulse-dot:hover {
    filter: brightness(1.15) drop-shadow(0 0 4px rgba(0,0,0,0.3));
}

.pulse-dot.dimmed {
    opacity: 0.15 !important;
}

.pulse-dot.highlighted {
    opacity: 1 !important;
}

.pulse-tooltip {
    position: absolute;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    pointer-events: none;
    z-index: 1000;
    max-width: 280px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
}

.pulse-tooltip.visible {
    opacity: 1;
    visibility: visible;
}

.pulse-tooltip-headline {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
    line-height: 1.3;
}

.pulse-tooltip-source {
    font-size: 12px;
    color: #666;
}

.pulse-topic-label {
    font-size: 12px;
    fill: #666;
}

/* Density ribbons showing article frequency over time */
.pulse-ribbon {
    pointer-events: none;
}

/* Epoch backgrounds (temporal compression zones) */
.pulse-epoch {
    pointer-events: none;
}

.pulse-epoch-archive {
    opacity: 0.6;
}

.pulse-epoch-divider {
    pointer-events: none;
}

.pulse-year-label {
    font-family: inherit;
    user-select: none;
}

.pulse-epoch-label {
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 1px;
    user-select: none;
}

/* ==========================================================================
   Mobile Foundation - Touch Device Support
   ========================================================================== */

/* --------------------------------------------------------------------------
   Small Phone Breakpoint (375px - iPhone SE/Mini)
   -------------------------------------------------------------------------- */
@media (max-width: 375px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
    }

    .container,
    .container-wide {
        padding: 0 var(--space-sm);
    }

    .site-title {
        font-size: 2rem;
    }

    .site-subtitle {
        font-size: 0.875rem;
    }

    .site-byline {
        font-size: 0.75rem;
    }

    .site-nav {
        gap: var(--space-md);
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-link {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-sm);
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .lead {
        font-size: 0.9375rem;
    }

    .insight-number {
        font-size: 1.75rem;
    }

    .insight-card {
        padding: var(--space-md);
    }

    .heatmap-container {
        height: 60vh;
        padding: var(--space-xs);
    }

    .viz-footer {
        padding-top: var(--space-xs);
    }

    .viz-watermark {
        font-size: 0.6875rem;
    }

    .viz-legend {
        gap: var(--space-xs) var(--space-sm);
    }

    .viz-legend-item {
        font-size: 0.6875rem;
    }
}

/* --------------------------------------------------------------------------
   Touch Target Helpers (pointer: coarse)
   Ensures 44px minimum touch targets on touch devices
   -------------------------------------------------------------------------- */
@media (pointer: coarse) {
    /* Minimum touch targets for interactive elements */
    button,
    .nav-link,
    .browser-btn,
    [role="button"],
    select,
    input[type="range"],
    .proto-select {
        min-height: 44px;
        min-width: 44px;
    }

    /* Larger tap targets for sliders */
    input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    input[type="range"]::-moz-range-thumb {
        width: 24px;
        height: 24px;
    }

    /* Increase spacing for touch-friendly navigation */
    .site-nav {
        gap: var(--space-sm);
    }

    .nav-link {
        padding: var(--space-sm) var(--space-md);
    }

    /* Active state feedback for touch */
    button:active,
    .nav-link:active,
    .browser-btn:active,
    [role="button"]:active {
        transform: scale(0.97);
        opacity: 0.9;
    }

    /* Disable hover effects that don't work well on touch */
    .heatmap-cell:hover {
        stroke: none;
        stroke-width: 0;
    }

    /* Make tooltips slightly larger on touch */
    .tooltip {
        font-size: 0.9375rem;
        padding: var(--space-md);
        max-width: 300px;
    }

    /* Larger legend swatches for touch */
    .viz-legend-swatch {
        width: 16px;
        height: 16px;
    }
}

/* --------------------------------------------------------------------------
   Touch Device Body Class Hook
   Applied via JS when touch is detected
   -------------------------------------------------------------------------- */
body.touch-device {
    /* Prevent text selection during touch interactions */
    -webkit-user-select: none;
    user-select: none;
}

body.touch-device .heatmap-container,
body.touch-device .scatter-container,
body.touch-device .proto-container,
body.touch-device .pulse-container {
    /* Prevent elastic scrolling on iOS */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* Re-enable text selection for content areas */
body.touch-device p,
body.touch-device h1,
body.touch-device h2,
body.touch-device h3,
body.touch-device .lead,
body.touch-device .intro {
    -webkit-user-select: text;
    user-select: text;
}

/* --------------------------------------------------------------------------
   Fluid Typography
   -------------------------------------------------------------------------- */
@supports (font-size: clamp(1rem, 2vw, 2rem)) {
    .site-title {
        font-size: clamp(2rem, 6vw, 4rem);
    }

    .site-subtitle {
        font-size: clamp(0.875rem, 2vw, 1.125rem);
    }

    h1 {
        font-size: clamp(1.75rem, 5vw, 3rem);
    }

    h2 {
        font-size: clamp(1.375rem, 4vw, 2rem);
    }

    h3 {
        font-size: clamp(1.125rem, 3vw, 1.5rem);
    }

    .lead {
        font-size: clamp(0.9375rem, 2vw, 1.125rem);
    }

    .insight-number {
        font-size: clamp(1.5rem, 5vw, 2.5rem);
    }
}

/* --------------------------------------------------------------------------
   Mobile-Specific Tooltip Styles
   -------------------------------------------------------------------------- */
.mobile-tooltip {
    position: absolute;
    background-color: var(--color-text);
    color: var(--color-surface);
    padding: var(--space-sm) var(--space-md);
    border-radius: 8px;
    font-size: 0.875rem;
    max-width: 280px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.mobile-tooltip.visible {
    opacity: 1;
    visibility: visible;
}

/* Touch devices get persistent tooltips with dismiss hint */
body.touch-device .mobile-tooltip::after {
    content: 'Tap elsewhere to dismiss';
    display: block;
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-xs);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Mobile Zoom Controls (fixed overlay)
   -------------------------------------------------------------------------- */
.mobile-zoom-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    gap: 8px;
    z-index: 100;
}

body.touch-device .mobile-zoom-controls {
    display: flex;
}

.mobile-zoom-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: all 0.15s ease;
}

.mobile-zoom-btn:active {
    transform: scale(0.95);
    background: var(--color-accent);
    color: white;
}

/* Hide desktop zoom controls on touch devices */
body.touch-device .zoom-controls {
    display: none;
}

/* --------------------------------------------------------------------------
   Mobile Navigation Improvements
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .site-nav {
        flex-wrap: wrap;
        gap: var(--space-xs) var(--space-sm);
    }

    .nav-link {
        padding: var(--space-sm);
        flex: 0 0 auto;
    }

    /* Full-width controls on mobile */
    .search-wrapper,
    .scatter-search-wrapper {
        max-width: 100%;
    }

    .search-input {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    /* Stack toolbar vertically on mobile */
    .viz-toolbar {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }

    /* Reduce visualization container heights */
    .heatmap-container {
        height: 55vh;
        min-height: 300px;
    }

    .scatter-container,
    .proto-container,
    .pulse-container {
        min-height: 350px;
    }

    /* Compact footer on mobile */
    .viz-footer {
        padding-top: var(--space-sm);
    }

    .viz-legend {
        flex-direction: column;
        align-items: center;
        gap: var(--space-xs);
    }
}