:root {
    --bg-color: #f8f9fa;
    --sidebar-bg: #1b4332; /* Dark Green */
    --sidebar-text: #e8f5e9;
    --accent-color: #40916c; /* Medium Green */
    --accent-hover: #52b788;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --card-bg: #ffffff;
    --border-color: #e9ecef;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);

    --font-serif: 'Merriweather', serif;
    --font-sans: 'Inter', sans-serif;
    
    /* Legacy variables for components I might have missed */
    --primary-green: #2E7D32;
    --dark-green: #1B5E20;
    --light-green: #4CAF50;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-color);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden; /* App-like feel */
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    z-index: 2001;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
}

.nav-links {
    list-style: none;
    padding: 24px 16px;
    flex-grow: 1;
}

.nav-item {
    margin-bottom: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-item:hover {
    background-color: rgba(255,255,255,0.1);
}

.nav-item.active {
    background-color: var(--accent-color);
    box-shadow: var(--shadow-sm);
}

.nav-item.active a {
    color: #fff;
}

.nav-item.highlight {
    margin-top: 24px;
    border: 1px solid rgba(255,255,255,0.2);
}

.sidebar-footer {
    padding: 24px;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
    display: block;
    max-width: 120px;
    margin: 12px auto 0 auto;
    opacity: 0.8;
    filter: brightness(0) invert(1);
    transition: opacity 0.2s;
}

.footer-logo:hover {
    opacity: 1;
}

/* Main Content */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
    position: relative;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
}

.mobile-header {
    display: none;
    padding: 16px;
    background: var(--sidebar-bg);
    color: white;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

/* Sections */
.content-section {
    display: none;
    padding: 40px 60px;
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease-in-out;
    width: 100%;
}

.content-section.active {
    display: block;
}

.content-section.map-mode {
    padding: 0;
    max-width: none;
    height: 100%;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

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

/* Headers */
.section-header {
    margin-bottom: 40px;
}

.section-header h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--sidebar-bg);
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.card h2, .card h3 {
    font-family: var(--font-serif);
    color: var(--sidebar-bg);
    margin-bottom: 16px;
}

.hero-card {
    background: linear-gradient(135deg, #1b4332 0%, #2d6a4f 100%);
    color: white;
}

.hero-card h2 { color: white; }
.hero-card p { color: rgba(255,255,255,0.9); font-size: 1.1rem; }

.card-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 16px;
    display: block;
}

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

.tags {
    margin-top: 20px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(255,255,255,0.2);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Feature List */
.feature-list {
    margin-left: 20px;
    margin-bottom: 20px;
}

.feature-list li {
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* Timeline */
.timeline-container {
    position: relative;
    padding-left: 20px;
    border-left: 2px solid var(--border-color);
}

.timeline-item {
    margin-bottom: 40px;
    position: relative;
}

.timeline-date {
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 5px;
    width: 10px;
    height: 10px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 2px solid white;
}

/* Map UI */
.map-wrapper {
    position: relative;
    height: 100%;
    width: 100%;
    overflow: hidden;
    flex-grow: 1;
}

#leaflet-map {
    height: 100%;
    width: 100%;
    z-index: 1;
}

.map-sidebar {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 320px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: calc(100% - 40px);
    display: flex;
    flex-direction: column;
}

.map-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: #f8f9fa;
    border-radius: 12px 12px 0 0;
}

.search-box {
    margin-top: 12px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 10px 10px 10px 36px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-sans);
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.filters-container {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-group {
    flex: 1 1 45%; /* Flex-grow, Flex-shrink, Basis - allows wrapping */
    min-width: 120px;
}

.checkbox-group {
    flex: 1 1 100%; /* Full width for checkbox */
    margin-top: 5px;
}

.filter-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    background-color: white;
}

.filter-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text-primary);
}

.results-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 0;
}

.result-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

.result-item:hover {
    background-color: #f1f3f5;
}

.result-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.result-title {
    font-weight: 600;
    color: var(--text-primary);
}

.result-score {
    background: var(--sidebar-bg);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.result-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.floating-legend {
    position: absolute;
    top: 20px;
    right: 20px;
    background: white;
    padding: 16px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.legend-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

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

.dot.high { background: #2E7D32; }
.dot.medium { background: #F9A825; }
.dot.low { background: #E53935; }

.legend-toggle {
    display: flex;
    gap: 12px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid #e0e0e0;
}

.legend-toggle label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    cursor: pointer;
}

.legend-toggle input[type="radio"] {
    margin: 0;
    cursor: pointer;
}

/* Methodology Table (Inherited Style) */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 12px;
        text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--sidebar-bg);
}

/* Loading Indicator */
.loading-state {
        padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    display: none;
    }
    
.loading-state.active {
    display: block;
    }
    
/* Leaflet Overrides */
.leaflet-popup-content-wrapper {
        border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.popup-header {
    font-weight: 700;
    color: var(--sidebar-bg);
    margin-bottom: 5px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 5px;
}

/* Priority Badge Styles in Popup */
.priority-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.priority-badge.high { background-color: #2E7D32; }
.priority-badge.medium { background-color: #F9A825; }
.priority-badge.low { background-color: #E53935; }

/* Inline Link */
a.inline-link {
    color: var(--accent-color);
    text-decoration: underline;
    cursor: pointer;
    font-weight: 500;
}

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

/* Citations */
.citation {
    position: relative;
    cursor: help;
}

.citation-mark {
    font-size: 0.7em;
    vertical-align: super;
    color: var(--accent-color);
    font-weight: 600;
    padding: 0 2px;
    transition: color 0.2s;
}

.citation-mark:hover {
    color: var(--accent-hover);
}

.citation-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--sidebar-bg);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.5;
    width: max-content;
    max-width: 320px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    z-index: 1000;
    pointer-events: none;
}

.citation-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--sidebar-bg);
}

.citation:hover .citation-tooltip,
.citation:focus .citation-tooltip,
.citation.active .citation-tooltip {
    opacity: 1;
    visibility: visible;
}

.citation-tooltip .cite-author {
    font-weight: 600;
}

.citation-tooltip .cite-title {
    font-style: italic;
}

.citation-tooltip .cite-year {
    color: rgba(255,255,255,0.7);
}

.citation-tooltip .cite-source {
    color: rgba(255,255,255,0.7);
    font-size: 0.9em;
}

/* References Section */
.references-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
}

.references-section h3 {
    font-family: var(--font-serif);
    color: var(--sidebar-bg);
    margin-bottom: 20px;
}

.reference-list {
    list-style: none;
}

.reference-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.reference-number {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-right: 12px;
}

/* Paper Layout */
.paper-layout {
    display: flex;
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    align-items: flex-start; /* Important for sticky sidebar */
}

/* Paper Outline (Sidebar) */
.paper-outline {
    width: 240px;
    flex-shrink: 0;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    padding-right: 10px;
}

.paper-outline h3 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-left: 12px;
}

.paper-outline ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border-left: 2px solid var(--border-color);
}

.paper-outline li {
    margin: 0;
    padding: 0;
}

.paper-outline a {
    display: block;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 2px solid transparent;
    margin-left: -2px; /* Overlap border */
    line-height: 1.4;
}

.paper-outline a:hover {
    color: var(--accent-color);
    background-color: rgba(0,0,0,0.02);
}

.paper-outline a.active {
    color: var(--sidebar-bg); /* Dark Green */
    font-weight: 600;
    border-left-color: var(--accent-color);
    background-color: rgba(64, 145, 108, 0.05); /* Light accent background */
}

/* Indent subsections */
.paper-outline .toc-h3 {
    padding-left: 24px;
    font-size: 0.85rem;
}

/* Paper Container (Adjusted for Layout) */
.paper-container {
    background: var(--card-bg);
    border-radius: 2px; /* reduced radius for paper feel */
    padding: 60px 80px; /* larger padding */
    box-shadow: 0 4px 20px rgba(0,0,0,0.08); /* softer shadow */
    border: 1px solid var(--border-color);
    flex-grow: 1; /* Take remaining width */
    max-width: 800px; /* optimal reading width */
    min-width: 0; /* Prevent flex overflow */
}

/* ... existing .paper-content-inner styles ... */

.paper-content-inner {
    font-family: var(--font-serif);
    font-size: 1.1rem; /* slightly larger */
    line-height: 1.8;
    color: #1a1a1a; /* darker text for contrast */
}

.paper-content-inner h2 {
    font-family: var(--font-sans); /* sans-serif headings for contrast */
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 48px;
    margin-bottom: 24px;
    padding-bottom: 0;
    border-bottom: none;
    letter-spacing: -0.02em;
}

.paper-content-inner h3 {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 36px;
    margin-bottom: 16px;
}

.paper-content-inner h4 {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.paper-content-inner p {
    margin-bottom: 24px;
    text-align: left; /* removed justify */
}

.paper-content-inner ul,
.paper-content-inner ol {
    margin-left: 24px;
    margin-bottom: 20px;
}

.paper-content-inner li {
    margin-bottom: 8px;
}

.paper-content-inner strong {
    font-weight: 700;
    color: var(--sidebar-bg);
}

.paper-content-inner em {
    font-style: italic;
}

.paper-content-inner blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 20px;
    margin: 24px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.paper-content-inner hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 32px 0;
}

.paper-content-inner table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-family: var(--font-sans);
    font-size: 0.95rem;
}

.paper-content-inner th,
.paper-content-inner td {
    padding: 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.paper-content-inner th {
    background: #f8f9fa;
    font-weight: 600;
}

/* Paper Citations (in-text, parenthetical) - override superscript style */
.paper-content-inner .citation-mark {
    font-size: inherit;
    vertical-align: baseline;
}

/* Paper Title & Meta */
.paper-title {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.paper-meta {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 40px;
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Paper Abstract */
.paper-abstract {
    margin: 40px auto;
    padding: 0 40px;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
    font-style: italic;
    text-align: left; /* Left align for readability */
    max-width: 650px; /* Slightly wider */
    background: transparent;
    border: none;
}

.paper-abstract strong {
    display: inline; /* Keep inline */
    font-weight: 700;
    color: var(--text-primary);
    font-style: normal;
    text-transform: none; /* No uppercase */
    letter-spacing: normal;
}

.paper-abstract p {
    margin-bottom: 0;
    text-align: justify; /* Justify text */
}

.paper-abstract-title {
    display: block;
    text-align: center;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    font-style: normal;
    font-family: var(--font-sans);
    color: var(--text-primary);
}

/* Paper References */
.paper-references {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.paper-references h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.paper-references ul {
    list-style: none;
    margin-left: 0;
}

.paper-references li {
    padding: 8px 0;
    border-bottom: none;
    font-size: 0.95rem;
    padding-left: 24px;
    text-indent: -24px; /* Hanging indent */
    margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        overflow: hidden;
    }

    .sidebar {
        position: absolute;
        height: 100%;
        transform: translateX(-100%);
        top: 0;
        left: 0;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 15px rgba(0,0,0,0.3); /* Add shadow for visibility */
    }

    .mobile-header {
        display: flex;
        justify-content: space-between; /* Improve layout */
    }

    #menu-toggle {
        background: transparent;
        border: none;
        color: white;
        font-size: 1.5rem;
        cursor: pointer;
        padding: 5px; /* Increase click area */
    }

    .content-section {
        padding: 24px;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .map-sidebar {
        width: calc(100% - 40px);
        max-height: 40%;
        bottom: 20px;
        top: auto;
    }

    .paper-layout {
        flex-direction: column;
        gap: 0;
    }

    .paper-outline {
        display: none; /* Hide outline on mobile for now */
    }

    .paper-container {
        padding: 24px 20px;
    }

    .paper-content-inner {
        font-size: 1rem;
    }

    .paper-content-inner h2 {
        font-size: 1.5rem;
        margin-top: 32px;
    }

    .paper-content-inner h3 {
        font-size: 1.2rem;
    }
}