html {
    margin: 0;
    padding: 0;
    /* overflow-x: hidden; -- REMOVED: This breaks position: sticky */
}

body {
    margin: 0;
    padding: 0;
    font-family: Georgia, 'Times New Roman', Times, serif;
    /* overflow-x: hidden; -- REMOVED: This breaks position: sticky */
}

/* Compact black header */
header {
    background-color: #000;
    padding: 1rem 2rem;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 200; /* Very high z-index to ensure it stays on top */
    width: 100%;
    box-sizing: border-box;
    margin: 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.0rem;
    margin: 0;
    color: #fff;
    font-weight: 400;
}

.header-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-link {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    transition: opacity 0.2s ease;
}

.author-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.github-link {
    color: #fff;
    display: flex;
    align-items: center;
    transition: opacity 0.2s ease;
}

.github-link:hover {
    opacity: 0.8;
}

.github-link svg {
    width: 20px;
    height: 20px;
}

/* Full-screen hero section with background image */
#hero-section {
    position: relative;
    width: 100vw;
    height: 95vh; /* Increased height from top to almost middle */
    background-image: url('imgs/GeminiMigrBase.JPG');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    box-sizing: border-box;
    overflow: hidden; /* Prevent horizontal scroll in hero section */
}

.hero-content {
    text-align: center;
    color: #fff;
    width: 100%;
    padding: 3rem; /* Increased padding to make the box bigger */
    margin-top: 0vh;
    background-color: rgba(0, 0, 0, 0.3); /* More transparent overlay for readability */
}

.hero-title {
    font-size: 5rem; /* Increased from 3.5rem */
    margin-bottom: 1.5rem; /* Increased spacing */
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
    margin-top: 0;
}

.hero-subtitle {
    font-size: 2rem; /* Increased from 1.5rem */
    font-style: italic;
    margin: 0;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
}

/* General h1 styling (for other sections) */
h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* Migration Section */
#migration-section {
    background-color: #ffffff;
    padding: 0; /* Full width, no padding */
    min-height: 500vh; /* Increased to ensure last card renders */
    width: 100%;
    position: relative;
    border-bottom: 1px solid #ddd;
}

.migration-container {
    color: #ffffff;
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
    margin-top: 0;
}

#migration-viz {
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
    width: 100%;
    z-index: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.1);
    margin-top: 0;
}

#migration-section article {
    position: relative;
    margin: 0;
    margin-left: auto;
    margin-right: 2rem;
    max-width: 30rem;
    z-index: 10;
    margin-top: calc(-100vh + 60px);
    padding-top: 50vh;
    padding-bottom: 120vh; /* Add space so last card can scroll up while SVG stays */
    pointer-events: none;
}

#migration-section .step {
    margin: 0 auto 80vh auto;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    opacity: 0.9;
    transition: opacity 0.2s;
    text-align: center;
}

#migration-section .step:last-child {
    margin-bottom: 0;
}

#migration-section .step.is-active {
    opacity: 1;
    border-left: 3px solid #333;
}

#migration-section .step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

#migration-section .step p {
    font-size: 1rem;
    line-height: 1.6;
    color: #555;
}

/* Migration era text colors */
.era-1850 { color: #edbe62; }
.era-1960 { color: #1f9aa8; }
.era-2010 { color: #1d55a4; }
.era-2024 { color: #c81d25; }

/* Migration context section */
.migration-context {
    position: relative;
    margin: 0 auto;
    max-width: 900px;
    padding: 3rem 2rem;
    text-align: left;
    background-color: #fff;
    border-bottom: none;
}

.migration-context h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    margin-top: 2rem;
    color: #333;
    text-align: center;
}

.migration-context h3:first-child {
    margin-top: 0;
}

.migration-context p {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 1.5rem;
    text-align: justify;
    margin-left: auto;
    margin-right: auto;
}

/* Highlight classes for key information */
.migration-context .highlight-number {
    font-weight: bold;
    color: #1d55a4; /* Modern era blue */
    font-size: 1.05em;
}

.migration-context .highlight-percent {
    font-weight: bold;
    color: #c81d25; /* Today era red */
    font-size: 1.05em;
}

.migration-context .highlight-keyword {
    font-weight: bold;
    color: #1f9aa8; /* Post-war era teal */
    font-size: 1.05em;
}

.migration-context .highlight-historical {
    font-weight: bold;
    color: #edbe62; /* Early era gold */
    font-size: 1.05em;
}

.migration-context .highlight-contrast {
    font-weight: bold;
    color: #c81d25; /* Red for contrast/emphasis */
    background-color: rgba(200, 29, 37, 0.1);
    padding: 0.1em 0.3em;
    border-radius: 3px;
}

/* Person icon styling */
.person-icon {
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.person-icon path {
    transition: fill 0.8s ease;
}

#scrolly {
    position: relative;
    display: block;
    /* Reset flex */
    background-color: #ffffff;
    /* overflow: hidden removed - it breaks sticky positioning for #map */
    padding-bottom: 3vh; /* Allow cards to scroll up and exit */
}

#map {
    position: sticky;
    top: 60px; /* Position below the black header */
    height: calc(98vh - 60px);
    width: 100%;
    z-index: 0;
    overflow: hidden; /* Prevent map content from scrolling horizontally */
}

article {
    position: relative;
    margin: 0;
    margin-left: auto;
    margin-right: 2rem;
    max-width: 30rem;
    z-index: 10;
    margin-top: calc(-100vh + 60px); /* Adjusted for header height */
    /* Pull content up to overlay map */
    padding-top: 50vh;
    /* Start content lower down */
    pointer-events: none;
}

.step {
    margin: 0 auto 80vh auto;
    /* Space out steps */
    background-color: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    /* Re-enable pointer events for text interaction if needed */
    opacity: 0.9;
    transition: opacity 0.2s;
    text-align: center;
    /* Center text inside step */
}

.step:last-child {
    margin-bottom: 50vh;
}

.step.is-active {
    opacity: 1;
    border-left: 3px solid #333;
}

.destination-step {
    text-align: left;
}

.destination-step .dest-summary {
    margin-bottom: 1rem;
}

.destination-step ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.destination-step li {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.destination-step li span {
    color: #666;
    font-weight: 400;
}

.interactive-step {
    text-align: left;
}

/* Timeline Section */
#timeline-section {
    background-color: #fff;
    padding: 1.5rem 2rem 3rem 2rem; /* Reduced top padding */
    border-bottom: 1px solid #ddd;
    overflow: visible; /* Ensure sticky positioning works */
}

.timeline-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    overflow: visible; /* Ensure sticky positioning works */
}

.timeline-header {
    position: sticky;
    top: 60px; /* Position below the black header (header padding 1rem + content ~60px) */
    z-index: 150; /* High z-index but below header (200) */
    background-color: rgba(255, 255, 255, 0.98);
    padding: 1rem 0 0.75rem 0;
    backdrop-filter: blur(8px);
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.timeline-container h2 {
    font-size: 2rem;
    margin: 0;
    text-align: center;
    color: #333;
}

.timeline-description {
    text-align: center;
    color: #666;
    margin: 0.35rem 0 0.5rem 0;
    font-size: 1rem;
}

/* Country filter - positioned at top left of the timeline */
#timeline-filter {
    position: fixed;
    top: 160px; /* Match the sticky top position of timeline-viz */
    left: calc((100vw - min(1100px, 100vw)) / 2 + 2rem);
    background-color: rgba(255, 255, 255, 0.514);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-width: 250px;
    width: 280px;
    z-index: 100;
    transition: opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
}

#timeline-filter.visible {
    opacity: 1;
    pointer-events: auto;
}

#timeline-filter p {
    margin: 0 0 0.75rem 0;
    font-size: 0.9rem;
    color: #333;
    text-align: left;
}

#timeline-filter select {
    width: 100%;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    font-family: Georgia, 'Times New Roman', Times, serif;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    cursor: pointer;
}

#timeline-filter select:hover {
    border-color: #999;
}

/* Timeline scrolly section */
#timeline-scrolly {
    position: relative; /* For absolute positioning of filter */
    background-color: #fff;
    min-height: 200vh; /* Enough height for cards + spacer */
}

#timeline-viz {
    position: sticky; /* Sticky positioning works for absolute children too */
    top: 140px; /* Position below header (60px) + timeline-header (~80px) */
    height: calc(100vh - 140px);
    width: 100%;
    z-index: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
}

#timeline-viz svg {
    display: block;
    margin: 0 auto;
    border: none;
    background-color: #ffffff;
    overflow: visible;
}

#timeline-section article {
    position: relative;
    margin: 0;
    margin-left: auto;
    margin-right: 2rem;
    max-width: 30rem;
    z-index: 10;
    margin-top: calc(-100vh + 140px); /* Adjusted for header + timeline-header */
    padding-top: 50vh;
    pointer-events: none;
}

#timeline-section .step {
    margin: 0 auto 80vh auto;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    opacity: 0.9;
    transition: opacity 0.2s;
    text-align: center;
}

#timeline-section .step:last-child {
    margin-bottom: 0;
}

.timeline-spacer {
    height: 150vh;
}

#timeline-section .step.is-active {
    opacity: 1;
    border-left: 3px solid #333;
}

#timeline-section .step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

/* Timeline line styles */
.timeline-line {
    transition: opacity 0.3s;
}

.timeline-line:hover {
    opacity: 1;
    stroke-width: 3;
}

/* Timeline circles */
#timeline-viz circle {
    cursor: pointer;
    transition: r 0.2s;
}

#timeline-viz circle:hover {
    r: 5;
}

/* Timeline axes */
.x-axis path,
.x-axis line,
.y-axis path,
.y-axis line {
    stroke: #666;
    stroke-width: 1;
}

.x-axis text,
.y-axis text {
    fill: #666;
    font-size: 12px;
}

.axis-label {
    fill: #333;
    font-size: 14px;
    font-weight: 500;
}

/* Timeline legend */
.timeline-legend {
    font-family: Georgia, 'Times New Roman', Times, serif;
}

/* Timeline tooltip */
.timeline-tooltip {
    position: absolute;
    padding: 8px 12px;
    background-color: rgba(0, 0, 0, 0.85);
    color: #fff;
    border-radius: 4px;
    font-size: 12px;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.timeline-tooltip strong {
    display: block;
    margin-bottom: 4px;
}

#map .map-tooltip {
    position: absolute;
    padding: 6px 10px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 4px;
    font-size: 12px;
    pointer-events: none;
    z-index: 5;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* Trump marker */
.trump-marker-line {
    pointer-events: none;
}

.trump-marker-label {
    pointer-events: none;
}

/* Sankey Section */
#sankey-section {
    background-color: #fff;
    padding: 3rem 2rem;
    border-bottom: 1px solid #ddd;
}

.sankey-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.sankey-container h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-align: center;
    color: #333;
}

.sankey-description {
    text-align: justify;
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

#sankey-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
    min-height: 450px;
    padding: 1rem;
    overflow: visible;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

#sankey-container svg {
    border: none;
    background-color: #ffffff;
    overflow: visible;
}

/* Detention Journey Section */
#detention-section {
    position: relative;
    background-color: #f3f3f3;
    padding: 0;
    padding-bottom: 50vh; /* Allow cards to scroll up and exit */
    min-height: 400vh;
}

.detention-intro {
    background-color: #fff;
    padding: 2rem 2rem;
    text-align: center;
    border-bottom: 1px solid #ddd;
    margin-left: auto;
    margin-right: auto;
}

.detention-intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.detention-description {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #666;
}

#detention-scrolly {
    position: relative;
    display: block;
}

#detention-map {
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
    width: 100%;
    z-index: 0;
    overflow: hidden;
}

#detention-section article {
    position: relative;
    margin: 0;
    margin-left: auto;
    margin-right: 2rem;
    max-width: 32rem;
    z-index: 10;
    margin-top: calc(-100vh + 60px);
    padding-top: 50vh;
    padding-bottom: 50vh;
    pointer-events: none;
}

#detention-section .step {
    margin: 0 auto 80vh auto;
    background-color: rgba(251, 249, 249, 0.376);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(228, 228, 228, 0.15);
    pointer-events: auto;
    opacity: 0.9;
    transition: opacity 0.2s;
}

#detention-section .step:last-child {
    margin-bottom: 0;
}

#detention-section .step.is-active {
    opacity: 1;
    border-left: 3px solid #333;
}

#detention-section .step h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
}

#detention-section .step p {
    font-size: 1rem;
    line-height: 1.6;
    color: #555;
    margin-bottom: 0.8rem;
}

.person-demographics,
.person-journey {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
    text-align: left;
}

.person-demographics p,
.person-journey p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

.person-demographics strong,
.person-journey strong {
    color: #333;
}

.highlight-note {
    font-style: italic;
    font-size: 0.9rem;
    color: #666;
    margin-top: 1rem;
}

.particle-note {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 0.8rem;
    border-radius: 6px;
    margin-top: 1rem;
    font-size: 0.95rem;
    border-left: 3px solid #888;
}

.particle-note strong {
    color: #333;
}

/* Location statistics styling */
.location-stats {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
    text-align: left;
}

.location-stats p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

.location-stats .stat-detail {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #666;
}

.destination-list {
    list-style: none;
    padding-left: 0;
    margin: 0.5rem 0;
}

.destination-list li {
    padding: 0.3rem 0;
    font-size: 0.9rem;
    color: #555;
    border-bottom: 1px solid #ffffff;
}

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

/* Detention counter styling */
.detention-counter {
    background-color: rgba(20, 20, 20, 0.95);
    color: #ffffff;
    padding: 0.8rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.95rem;
    text-align: center;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.3);
}

/* Specific colors for each person's counter */
.detention-counter-1 {
    background-color: rgba(255, 255, 255, 0.95);
    color: #ff6b6b; /* Light red for person 1 */
    border-color: rgba(255, 107, 107, 0.4);
}

.detention-counter-2 {
    background-color: rgba(255, 255, 255, 0.95);
    color: #6b9fff; /* Light blue for person 2 */
    border-color: rgba(107, 159, 255, 0.4);
}

/* Facility tooltip styling */
.facility-tooltip {
    background-color: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    line-height: 1.4;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    max-width: 250px;
}

.facility-tooltip strong {
    font-size: 0.95rem;
    display: block;
    margin-bottom: 4px;
}

/* Interaction instructions */
.interaction-instructions {
    background-color: rgba(74, 144, 226, 0.1);
    border-left: 3px solid #4A90E2;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    font-size: 0.9rem;
    line-height: 1.8;
}

.interaction-instructions strong {
    color: #4A90E2;
}

/* Particle canvas styling */
#detention-particle-canvas {
    pointer-events: none;
}

/* Exit animation styles */
article.exiting {
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

article.exiting .step {
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

/* Data Sources Overlay */
#data-sources-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none; /* Hidden by default */
    align-items: center;
    justify-content: center;
    padding: 2rem;
    box-sizing: border-box;
}

#data-sources-overlay.active {
    display: flex;
}

.overlay-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.data-sources-card {
    position: relative;
    background-color: rgba(255, 255, 255, 0.98);
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 2001;
    margin: auto;
}

.data-sources-card h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #333;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 0.5rem;
}

.data-sources-card h3 {
    font-size: 1.3rem;
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    color: #444;
}

.data-sources-card ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.data-sources-card li {
    padding: 0.6rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
    color: #555;
    font-size: 0.95rem;
}

.data-sources-card li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #888;
    font-weight: bold;
}

.data-sources-card li strong {
    color: #333;
}

.data-sources-card a {
    color: #4a90e2;
    text-decoration: none;
    border-bottom: 1px solid rgba(74, 144, 226, 0.3);
    transition: border-color 0.2s;
}

.data-sources-card a:hover {
    border-bottom-color: #4a90e2;
    color: #357abd;
}

.data-source-section,
.methodology-section,
.notes-section {
    margin-bottom: 1.5rem;
}

.close-overlay-btn {
    display: block;
    margin: 2rem auto 0 auto;
    padding: 0.8rem 2rem;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.close-overlay-btn:hover {
    background-color: #555;
}

.close-overlay-btn:active {
    background-color: #222;
}

/* Data Sources Button */
.data-sources-btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background-color: rgba(74, 144, 226, 0.9);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 0.5rem;
}

.data-sources-btn:hover {
    background-color: rgba(74, 144, 226, 1);
    transform: translateY(-1px);
}

.data-sources-btn:active {
    transform: translateY(0);
    background-color: rgba(60, 120, 200, 1);
}