/* ============================================
   H Heuristics - Development Economics
   Professional Economist Style
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Palette - Deep scholarly blues and slate */
    --color-ink: #0f1419;
    --color-ink-light: #1d2939;
    --color-ink-muted: #475467;
    --color-slate: #344054;
    --color-slate-light: #667085;
    
    /* Accent - Warm amber/gold for emphasis */
    --color-accent: #b8860b;
    --color-accent-light: #d4a847;
    --color-accent-dark: #8b6914;
    
    /* Background tones */
    --color-paper: #faf9f7;
    --color-paper-warm: #f5f3ef;
    --color-paper-cool: #f8fafc;
    --color-white: #ffffff;
    
    /* Dark section palette */
    --color-dark-bg: #0c1821;
    --color-dark-surface: #162129;
    --color-dark-border: #2d3f4a;
    --color-dark-text: #e4e7eb;
    --color-dark-muted: #9ba8b4;
    
    /* Income distribution colors */
    --color-extreme: #1e3a5f;
    --color-moderate: #2d5a87;
    --color-vulnerable: #4a90b8;
    --color-above: #8fc1d4;
    --color-developed: #d1e9f0;
    
    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Container */
    --container-max: 1200px;
    --container-narrow: 900px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-ink);
    background-color: var(--color-paper);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.25;
    color: var(--color-ink);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.875rem, 4vw, 2.75rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.375rem, 2.5vw, 1.75rem);
    font-weight: 500;
}

h4 {
    font-size: 1.125rem;
    font-family: var(--font-sans);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

p {
    margin-bottom: 1.25em;
}

p:last-child {
    margin-bottom: 0;
}

.lead {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-slate);
    font-weight: 400;
}

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

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

strong {
    font-weight: 600;
}

blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg) var(--space-xl);
    border-left: 3px solid var(--color-accent);
    background: var(--color-paper-warm);
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-slate);
}

blockquote p {
    margin: 0;
}

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

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 249, 247, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-ink);
    text-decoration: none;
}

.logo span {
    font-weight: 400;
    color: var(--color-slate-light);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-slate);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-ink);
}

.nav-cta {
    background: var(--color-ink);
    color: var(--color-white) !important;
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
}

.nav-cta:hover {
    background: var(--color-ink-light);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--space-xl) var(--space-4xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(184, 134, 11, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(30, 58, 95, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-paper) 0%, var(--color-paper-warm) 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23344054' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
}

.hero-eyebrow {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent-dark);
    margin-bottom: var(--space-md);
}

.hero h1 {
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.375rem;
    line-height: 1.6;
    color: var(--color-slate);
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.1;
}

.stat-label {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-slate-light);
    margin-top: var(--space-sm);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-slate-light);
    font-size: 0.8125rem;
    animation: float 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* Sections */
.section {
    padding: var(--space-4xl) 0;
}

.section-header {
    margin-bottom: var(--space-2xl);
}

.section-header.light {
    color: var(--color-white);
}

.section-header.light h2 {
    color: var(--color-white);
}

.section-number {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-intro {
    font-size: 1.1875rem;
    line-height: 1.7;
    color: var(--color-slate);
    max-width: 800px;
    margin-bottom: var(--space-2xl);
}

.alt-section {
    background: var(--color-paper-warm);
}

.dark-section {
    background: var(--color-dark-bg);
    color: var(--color-dark-text);
}

.dark-section .section-intro {
    color: var(--color-dark-muted);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-3xl);
    align-items: start;
}

.content-grid.reverse {
    grid-template-columns: 340px 1fr;
}

.content-grid.reverse .content-main {
    order: 2;
}

.content-grid.reverse .content-sidebar {
    order: 1;
}

.content-main h3 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
}

.content-main h3:first-child {
    margin-top: 0;
}

/* Info Cards */
.info-card {
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.info-card h4 {
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    color: var(--color-ink);
}

.info-card ul {
    list-style: none;
}

.info-card li {
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
    color: var(--color-slate);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.info-card li:last-child {
    border-bottom: none;
}

.info-card.accent {
    background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-ink-light) 100%);
    border: none;
    color: var(--color-white);
}

.info-card.accent h4 {
    color: var(--color-accent-light);
}

.info-card.accent li {
    color: rgba(255, 255, 255, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
}

.info-card.highlight {
    background: var(--color-paper-warm);
    border-color: var(--color-accent);
}

.thinker-list li strong {
    display: block;
    color: var(--color-ink);
}

/* Income Distribution */
.income-distribution {
    margin: var(--space-2xl) 0;
}

.income-bar {
    display: flex;
    border-radius: 8px;
    overflow: hidden;
    min-height: 160px;
}

.income-segment {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    transition: flex var(--transition-slow);
}

.income-segment.extreme { background: var(--color-extreme); }
.income-segment.moderate { background: var(--color-moderate); }
.income-segment.vulnerable { background: var(--color-vulnerable); }
.income-segment.above { background: var(--color-above); }
.income-segment.developed { background: var(--color-developed); }

.segment-content {
    text-align: center;
    color: var(--color-white);
}

.income-segment.above .segment-content,
.income-segment.developed .segment-content {
    color: var(--color-ink);
}

.segment-content h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.segment-content .segment-range {
    font-size: 0.8125rem;
    opacity: 0.85;
    margin-bottom: var(--space-sm);
}

.segment-content .segment-percent {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.income-scale {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-dark-muted);
}

.income-note {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--color-dark-muted);
    font-size: 0.9375rem;
}

/* Implications Grid */
.implications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

.implication-card {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    padding: var(--space-xl);
}

.implication-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent-light);
    margin-bottom: var(--space-md);
}

.implication-icon svg {
    width: 100%;
    height: 100%;
}

.implication-card h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.implication-card p {
    font-size: 0.9375rem;
    color: var(--color-dark-muted);
    line-height: 1.6;
}

/* Convergence Section */
.channel-list {
    margin-top: var(--space-xl);
}

.channel {
    padding: var(--space-lg) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

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

.channel h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-accent-dark);
    margin-bottom: var(--space-sm);
}

.channel p {
    margin: 0;
    color: var(--color-slate);
}

/* Convergence Diagram */
.convergence-diagram {
    background: var(--color-paper-warm);
    border-radius: 8px;
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.convergence-diagram h4 {
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.trajectory-visual {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.trajectory {
    height: 40px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    padding: 0 var(--space-md);
    position: relative;
}

.trajectory::after {
    content: '';
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: inherit;
}

.trajectory.advanced {
    background: linear-gradient(90deg, var(--color-slate) 0%, var(--color-ink) 100%);
    width: 100%;
}

.trajectory.advanced::after {
    border-left-color: var(--color-ink);
}

.trajectory.emerging {
    background: linear-gradient(90deg, var(--color-vulnerable) 0%, var(--color-moderate) 100%);
    width: 75%;
}

.trajectory.emerging::after {
    border-left-color: var(--color-moderate);
}

.trajectory.stagnant {
    background: var(--color-slate-light);
    width: 35%;
}

.trajectory.stagnant::after {
    border-left-color: var(--color-slate-light);
}

.trajectory-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-white);
    white-space: nowrap;
}

.diagram-caption {
    font-size: 0.8125rem;
    color: var(--color-slate-light);
    font-style: italic;
}

/* Diffusion Framework */
.diffusion-framework {
    display: flex;
    align-items: stretch;
    gap: var(--space-lg);
    margin: var(--space-2xl) 0;
    flex-wrap: wrap;
}

.diffusion-concept {
    flex: 1;
    min-width: 250px;
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: var(--space-xl);
}

.concept-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.concept-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.concept-icon.growth-node {
    background: var(--color-ink);
    box-shadow: 0 0 0 4px rgba(15, 20, 25, 0.15);
}

.concept-icon.diffusion-zone {
    background: var(--color-vulnerable);
    box-shadow: 0 0 0 4px rgba(74, 144, 184, 0.15);
}

.concept-icon.poverty-zone {
    background: repeating-linear-gradient(
        45deg,
        var(--color-slate-light),
        var(--color-slate-light) 4px,
        var(--color-paper-warm) 4px,
        var(--color-paper-warm) 8px
    );
    border: 2px solid var(--color-slate-light);
}

.concept-header h3 {
    font-size: 1.125rem;
    margin: 0;
}

.diffusion-concept p {
    color: var(--color-slate);
    font-size: 0.9375rem;
}

.concept-examples {
    list-style: none;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.concept-examples li {
    font-size: 0.875rem;
    color: var(--color-slate-light);
    padding: var(--space-xs) 0;
}

.diffusion-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    gap: var(--space-sm);
    padding: 0 var(--space-md);
}

.diffusion-arrow svg {
    width: 60px;
    height: 24px;
}

.diffusion-arrow span {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.diffusion-arrow.weak {
    color: var(--color-slate-light);
}

.diffusion-arrow.weak svg path {
    stroke-dasharray: 4 4;
}

/* Mechanism Grid */
.diffusion-mechanisms {
    margin-top: var(--space-3xl);
}

.diffusion-mechanisms h3 {
    margin-bottom: var(--space-xl);
}

.mechanism-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.mechanism-card {
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: var(--space-lg);
}

.mechanism-card h4 {
    font-size: 0.9375rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
}

.mechanism-card p {
    font-size: 0.9375rem;
    color: var(--color-slate);
    margin: 0;
}

/* Bottlenecks */
.bottlenecks-section {
    margin-top: var(--space-3xl);
    padding: var(--space-xl);
    background: rgba(184, 134, 11, 0.08);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
}

.bottlenecks-section h3 {
    margin-bottom: var(--space-md);
}

.bottleneck-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.bottleneck {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.bottleneck-icon {
    width: 28px;
    height: 28px;
    background: #dc2626;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    flex-shrink: 0;
}

.bottleneck h4 {
    font-size: 0.9375rem;
    text-transform: none;
    letter-spacing: 0;
    margin-bottom: var(--space-xs);
}

.bottleneck p {
    font-size: 0.875rem;
    color: var(--color-slate);
    margin: 0;
}

/* Leapfrog Comparison */
.leapfrog-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin: var(--space-xl) 0;
}

.path {
    border-radius: 8px;
    padding: var(--space-xl);
}

.path h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    margin-bottom: var(--space-md);
}

.path.traditional {
    background: var(--color-paper-warm);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.path.leapfrog {
    background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-ink-light) 100%);
    color: var(--color-white);
}

.path.leapfrog h4 {
    color: var(--color-accent-light);
}

.path-steps {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.step {
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 0, 0, 0.06);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

.path.leapfrog .step {
    background: rgba(255, 255, 255, 0.15);
}

.step-arrow {
    color: var(--color-slate-light);
    font-weight: 300;
}

.path-desc {
    font-size: 0.875rem;
    color: var(--color-slate-light);
    font-style: italic;
    margin: 0;
}

.path.leapfrog .path-desc {
    color: rgba(255, 255, 255, 0.7);
}

/* Example Items */
.example-item {
    padding: var(--space-md) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.example-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.example-item strong {
    display: block;
    color: var(--color-accent-dark);
    margin-bottom: var(--space-xs);
}

.example-item p {
    font-size: 0.875rem;
    color: var(--color-slate);
    margin: 0;
}

/* Outcomes Grid */
.leapfrog-outcomes {
    margin-top: var(--space-3xl);
}

.outcomes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.outcome-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-paper-warm);
    border-radius: 8px;
}

.outcome-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    color: var(--color-accent-dark);
}

.outcome-icon svg {
    width: 100%;
    height: 100%;
}

.outcome-card h4 {
    font-size: 0.9375rem;
    text-transform: none;
    letter-spacing: 0;
    margin-bottom: var(--space-sm);
}

.outcome-card p {
    font-size: 0.875rem;
    color: var(--color-slate);
    margin: 0;
}

/* Leapfrog Limits */
.leapfrog-limits {
    margin-top: var(--space-3xl);
    padding: var(--space-xl);
    background: var(--color-paper-warm);
    border-radius: 8px;
}

.leapfrog-limits h3 {
    margin-bottom: var(--space-md);
}

.limits-list {
    list-style: none;
    margin: var(--space-lg) 0;
}

.limits-list li {
    padding: var(--space-sm) 0 var(--space-sm) var(--space-xl);
    position: relative;
    color: var(--color-slate);
}

.limits-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-slate-light);
}

.limits-conclusion {
    font-size: 0.9375rem;
    color: var(--color-ink);
    font-weight: 500;
    margin: 0;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

/* Poverty Section */
.poverty-framework {
    display: grid;
    gap: var(--space-3xl);
}

.driver-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.driver-card {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    padding: var(--space-xl);
}

.driver-number {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-light);
    margin-bottom: var(--space-md);
}

.driver-card h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.driver-card p {
    font-size: 0.9375rem;
    color: var(--color-dark-muted);
    margin: 0;
}

/* Geography */
.poverty-geography {
    margin-top: var(--space-2xl);
}

.poverty-geography h3 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.poverty-geography > p {
    color: var(--color-dark-muted);
}

.geography-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.geography-card {
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
    padding: var(--space-xl);
}

.geography-card h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.geography-card p {
    font-size: 0.9375rem;
    color: var(--color-dark-muted);
}

.geography-stat {
    display: inline-block;
    margin-top: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    background: rgba(184, 134, 11, 0.2);
    color: var(--color-accent-light);
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 600;
}

/* Policy Grid */
.poverty-policy {
    margin-top: var(--space-2xl);
}

.poverty-policy h3 {
    color: var(--color-white);
    margin-bottom: var(--space-xl);
}

.policy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.policy-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    padding: var(--space-lg);
    background: var(--color-dark-surface);
    border: 1px solid var(--color-dark-border);
    border-radius: 8px;
}

.policy-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    flex-shrink: 0;
    color: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.policy-icon svg {
    width: 100%;
    height: 100%;
}

.policy-item h4 {
    font-size: 0.9375rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.policy-item p {
    font-size: 0.875rem;
    color: var(--color-dark-muted);
    margin: 0;
}

/* Urban Flows */
.urban-flows {
    margin: var(--space-xl) 0;
}

.flow-item {
    padding: var(--space-lg);
    background: var(--color-paper-warm);
    border-radius: 8px;
    margin-bottom: var(--space-md);
}

.flow-direction {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.flow-from, .flow-to {
    padding: var(--space-xs) var(--space-md);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
}

.flow-from {
    background: var(--color-ink);
    color: var(--color-white);
}

.flow-to {
    background: var(--color-vulnerable);
    color: var(--color-white);
}

.flow-arrow {
    color: var(--color-slate-light);
    font-size: 1.25rem;
}

.flow-item p {
    font-size: 0.9375rem;
    color: var(--color-slate);
    margin: 0;
}

/* Spillover List */
.spillover-list {
    list-style: none;
}

.spillover-list li {
    display: flex;
    flex-direction: column;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.spillover-list li:last-child {
    border-bottom: none;
}

.spillover-list strong {
    color: var(--color-ink);
    font-size: 0.9375rem;
}

.spillover-list span {
    font-size: 0.8125rem;
    color: var(--color-slate-light);
}

/* Engine List */
.card-intro {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-md);
}

.engine-list {
    list-style: none;
    counter-reset: engine;
}

.engine-list li {
    counter-increment: engine;
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.engine-list li::before {
    content: counter(engine) ".";
    color: var(--color-accent-light);
    font-weight: 600;
    margin-right: var(--space-sm);
}

/* Urban Policy */
.urban-policy {
    margin-top: var(--space-3xl);
    padding: var(--space-xl);
    background: var(--color-paper-warm);
    border-radius: 8px;
}

.urban-policy h3 {
    margin-bottom: var(--space-xl);
}

.policy-columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.policy-col h4 {
    font-size: 0.9375rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-accent-dark);
    margin-bottom: var(--space-sm);
}

.policy-col p {
    font-size: 0.9375rem;
    color: var(--color-slate);
    margin: 0;
}

/* Africa Section */
.africa-framework {
    display: grid;
    gap: var(--space-2xl);
}

.africa-context h3, .africa-opportunities h3 {
    margin-bottom: var(--space-lg);
}

.context-grid, .opportunity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.context-card, .opportunity {
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: var(--space-xl);
}

.context-card h4, .opportunity h4 {
    font-size: 1rem;
    text-transform: none;
    letter-spacing: 0;
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
}

.context-card p, .opportunity p {
    font-size: 0.9375rem;
    color: var(--color-slate);
    margin: 0;
}

/* Conclusion Section */
.conclusion-section {
    background: linear-gradient(180deg, var(--color-paper-warm) 0%, var(--color-paper) 100%);
}

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

.conclusion-content h2 {
    margin-bottom: var(--space-lg);
}

.conclusion-content .lead {
    font-size: 1.375rem;
}

.conclusion-content p {
    font-size: 1.125rem;
    color: var(--color-slate);
}

.cta-section {
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.cta-section p {
    font-size: 1rem;
    margin-bottom: var(--space-lg);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-ink);
    color: var(--color-white);
    padding: var(--space-md) var(--space-xl);
    border-radius: 6px;
    font-weight: 600;
    transition: all var(--transition-base);
}

.cta-button:hover {
    background: var(--color-accent-dark);
    color: var(--color-white);
    transform: translateY(-2px);
}

.cta-button svg {
    width: 20px;
    height: 20px;
}

/* Footer */
.main-footer {
    background: var(--color-ink);
    color: var(--color-dark-text);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand .logo {
    color: var(--color-white);
    font-size: 1.75rem;
}

.footer-brand p {
    color: var(--color-dark-muted);
    margin-top: var(--space-sm);
}

.footer-links {
    display: flex;
    gap: var(--space-3xl);
}

.footer-col h4 {
    font-size: 0.8125rem;
    color: var(--color-dark-muted);
    margin-bottom: var(--space-md);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: var(--space-sm);
}

.footer-col a {
    color: var(--color-dark-text);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-accent-light);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-dark-border);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-dark-muted);
    margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .content-grid,
    .content-grid.reverse {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .content-grid.reverse .content-main,
    .content-grid.reverse .content-sidebar {
        order: unset;
    }
    
    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
    }
    
    .implications-grid,
    .mechanism-grid,
    .driver-cards,
    .geography-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .outcomes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .policy-columns {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .leapfrog-comparison {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .income-bar {
        flex-direction: column;
        min-height: auto;
    }
    
    .income-segment {
        min-height: 100px;
    }
    
    .income-scale {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .implications-grid,
    .mechanism-grid,
    .driver-cards,
    .geography-grid,
    .bottleneck-grid,
    .policy-grid,
    .context-grid,
    .opportunity-grid {
        grid-template-columns: 1fr;
    }
    
    .outcomes-grid {
        grid-template-columns: 1fr;
    }
    
    .policy-columns {
        grid-template-columns: 1fr;
    }
    
    .diffusion-framework {
        flex-direction: column;
    }
    
    .diffusion-arrow {
        flex-direction: row;
        padding: var(--space-md) 0;
    }
    
    .diffusion-arrow svg {
        transform: rotate(90deg);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 3rem;
        --space-4xl: 4rem;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero {
        padding: 100px var(--space-md) var(--space-2xl);
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.625rem;
    }
    
    .lead {
        font-size: 1.0625rem;
    }
}

/* Print styles */
@media print {
    .main-nav,
    .scroll-indicator,
    .cta-section,
    .main-footer {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: var(--space-xl) 0;
    }
    
    .section {
        padding: var(--space-xl) 0;
    }
    
    .dark-section {
        background: var(--color-paper-warm);
        color: var(--color-ink);
    }
}