/* ==========================================
   DESIGN SYSTEM - Scientific & Professional Theme
   ========================================== */
:root {
    /* Scientific Color Palette - Academic Blues & Grays */
    --bg-primary: #fafbfc;
    --bg-white: #ffffff;
    --bg-secondary: #f5f7fa;
    --accent-primary: #1a3a52;
    /* Deep Navy Blue - Academic */
    --accent-secondary: #d32f2f;
    /* Research Red - for warnings */
    --accent-tertiary: #455a64;
    /* Slate Gray - for secondary text */
    --text-primary: #212529;
    /* Pure Black - maximum readability */
    --text-secondary: #495057;
    /* Dark Gray */
    --text-muted: #6c757d;
    /* Medium Gray */

    /* Professional borders - less rounded */
    --border-subtle: #dee2e6;
    --border-medium: #adb5bd;

    /* Academic shadows - subtle and professional */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);

    /* Spacing - generous for readability */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;

    /* Typography - Academic fonts */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Merriweather', Georgia, 'Times New Roman', serif;
    /* Serif for academic feel */
    --font-mono: 'Courier New', monospace;
    /* For data/code */

    /* Animations - subtle only */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Scientific chart colors - colorblind-friendly */
    --chart-blue: #0077b6;
    --chart-red: #d62828;
    --chart-green: #2d6a4f;
    --chart-orange: #fb8500;
    --chart-purple: #7209b7;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
    line-height: 1.7;
    /* Academic line-height for readability */
}

/* ==========================================
   BACKGROUND - Clean white scientific theme
   ========================================== */
.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-primary);
    /* Subtle texture for depth */
    background-image:
        linear-gradient(0deg, transparent 24%, rgba(26, 58, 82, .02) 25%, rgba(26, 58, 82, .02) 26%, transparent 27%, transparent 74%, rgba(26, 58, 82, .02) 75%, rgba(26, 58, 82, .02) 76%, transparent 77%, transparent),
        linear-gradient(90deg, transparent 24%, rgba(26, 58, 82, .02) 25%, rgba(26, 58, 82, .02) 26%, transparent 27%, transparent 74%, rgba(26, 58, 82, .02) 75%, rgba(26, 58, 82, .02) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
}

.background-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: none;
    /* Remove colorful gradients */
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    padding: var(--spacing-sm) var(--spacing-md) 0 var(--spacing-md);
    text-align: center;
    position: relative;
    z-index: 10;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.main-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    animation: fadeInUp 0.8s ease backwards 0.2s;
}

.subtitle {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0;
    animation: fadeInUp 0.8s ease backwards 0.6s;
}

/* ==========================================
   INSTRUCTIONS
   ========================================== */
.instructions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease backwards 0.8s;
}

.instruction-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.instruction-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.instruction-card .icon {
    font-size: 1.5rem;
    filter: grayscale(100%);
    transition: filter var(--transition-base);
}

.instruction-card:hover .icon {
    filter: grayscale(0%);
}

.instruction-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==========================================
   CANVAS - Main interactive area
   ========================================== */
.canvas {
    position: relative;
    min-height: 55vh;
    padding: 0 var(--spacing-md);
    margin: 0 auto;
    max-width: 1400px;
}

/* ==========================================
   MASK CONTAINERS
   ========================================== */
.mask-container {
    position: absolute;
    cursor: pointer;
    transition: filter 0.3s ease;
    z-index: 1;
    transform-origin: top center;
    will-change: transform;
}

.mask-container:hover {
    filter: none;
}

.mask-container:hover .mask-image {
    filter: drop-shadow(0 0 30px rgba(44, 62, 128, 0.8)) drop-shadow(0 0 60px rgba(44, 62, 128, 0.5));
}

/* Gentle swinging animation at rest */
.mask-container.swinging {
    animation: gentleSwing 3s ease-in-out infinite;
}

@keyframes gentleSwing {

    0%,
    100% {
        transform: rotate(-2deg);
    }

    50% {
        transform: rotate(2deg);
    }
}

/* Initial animation - falling and swinging into place */
.mask-container {
    animation: fallAndSwing 2s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
}

#mask1 {
    animation-delay: 0.3s;
    left: 10%;
    top: 120px;
}

#mask2 {
    animation-delay: 0.6s;
    left: 40%;
    top: 120px;
}

#mask3 {
    animation-delay: 0.9s;
    left: 70%;
    top: 120px;
}

@keyframes fallAndSwing {
    0% {
        transform: translateY(-400px) rotate(-15deg);
        opacity: 0;
    }

    60% {
        transform: translateY(0) rotate(8deg);
        opacity: 1;
    }

    80% {
        transform: translateY(0) rotate(-4deg);
    }

    100% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
}

.mask-image {
    width: 380px;
    height: 500px;
    display: block;
    object-fit: contain;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.15));
    transition: filter var(--transition-base);
    user-select: none;
    -webkit-user-drag: none;
}


/* ==========================================
   YEAR LABELS
   ========================================== */
.year-label {
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-white);
    padding: 0.3rem 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

/* ==========================================
   POLLUTION VALUES
   ========================================== */
.pollution-value {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    background: var(--bg-white);
    padding: 0.5rem 1rem;
    border-radius: 12px;
    border: 2px solid var(--accent-secondary);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.pollution-value .unit {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

/* ==========================================
   DATA TOOLTIPS (Professional Card)
   ========================================== */
.mask-data {
    display: none !important;
}

.mask-data h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 1rem 0;
    color: #2c3e80;
    text-align: left;
    line-height: 1;
}

.data-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

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

.data-label {
    font-size: 0.85rem;
    color: #999;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.data-value {
    font-size: 1rem;
    color: #1a1a1a;
    font-weight: 700;
    text-align: right;
    letter-spacing: -0.02em;
}

/* First data item (main value) styling */
.data-item:first-of-type .data-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: #2c3e80;
}

.trend-high {
    color: #c94040 !important;
    font-weight: 800;
}

.trend-mid {
    color: #ff8c42 !important;
    font-weight: 800;
}

.trend-low {
    color: #27ae60 !important;
    font-weight: 800;
}

/* ==========================================
   POPUP SYSTEM
   ========================================== */
.popup-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 9998;
    animation: fadeIn 0.3s ease;
}

.data-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(44, 62, 128, 0.1);
    border-radius: 24px;
    padding: 2rem 1.75rem;
    min-width: 320px;
    max-width: 90vw;
    opacity: 0;
    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.2),
        0 8px 20px rgba(0, 0, 0, 0.12);
    z-index: 9999;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.data-popup.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.popup-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.popup-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #333;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.trend-down {
    color: #059669;
    font-weight: 700;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    text-align: center;
    padding: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 8rem;
}

.footer p {
    margin: 0;
    font-weight: 400;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md);
    }

    .instructions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .mask-image {
        width: 150px;
    }

    .mask-data {
        min-width: 200px;
        padding: var(--spacing-sm);
    }

    #mask1,
    #mask2,
    #mask3 {
        left: 50% !important;
        transform: translateX(-50%);
    }

    #mask1 {
        top: 100px !important;
    }

    #mask2 {
        top: 350px !important;
    }

    #mask3 {
        top: 600px !important;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.no-select {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
}

/* Pulse animation for interactive elements */
@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* ==========================================
   SECTION SCIENTIFIQUE
   ========================================== */
.scientific-section {
    background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 10%);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Introduction */
.science-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease backwards;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-lead {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 700px;
    margin: 0 auto;
}

/* Info Cards */
.info-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.8s ease backwards 0.2s;
}

.info-card h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.info-item {
    background: rgba(255, 255, 255, 0.5);
    padding: var(--spacing-md);
    border-radius: 16px;
    border: 1px solid rgba(44, 62, 128, 0.1);
    transition: all var(--transition-base);
}

.info-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.info-item h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.info-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Visualizations */
.viz-container {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.8s ease backwards 0.4s;
}

.viz-container h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.viz-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

#timelineChart,
#healthCorrelation,
#economicBubble {
    min-height: 400px;
    margin-top: var(--spacing-md);
}

/* Insights sections sous les visualisations */
.viz-insight {
    background: linear-gradient(135deg, rgba(44, 62, 128, 0.04), rgba(90, 107, 158, 0.04));
    border-left: 4px solid var(--accent-primary);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.viz-insight h4 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.viz-insight ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.viz-insight li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xs);
    padding-left: 1.5rem;
    position: relative;
}

.viz-insight li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 700;
}

.viz-insight li strong {
    color: var(--text-primary);
    font-weight: 700;
}

/* ==========================================
   SECTIONS INFORMATIVES - Scientific Academic Style
   ========================================== */

/* Section "Comprendre les PM2.5" - Academic style */
.understanding-section {
    background: var(--bg-white);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    /* Minimal rounding - professional */
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.understanding-section h3 {
    font-family: var(--font-display);
    /* Serif */
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: var(--spacing-sm);
    /* Remove emojis - add section number instead */
}

.understanding-section h3::before {
    content: "Section 1. ";
    font-weight: 700;
    color: var(--accent-primary);
}

.visual-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.visual-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: flex-start;
    /* Align top for professional look */
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
}

.visual-card.reverse {
    grid-template-columns: 1fr 1fr;
}

.info-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 2px;
    /* Minimal */
    box-shadow: var(--shadow-md);
    justify-self: center;
    border: 1px solid var(--border-subtle);
}

.visual-text h4 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    margin-top: 0;
}

.visual-text p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    text-align: justify;
    /* Academic style */
}

.detail-list,
.source-list {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-md);
}

.detail-list li,
.source-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--spacing-xs);
    padding-left: 1.8rem;
    position: relative;
}

.detail-list li::before {
    content: '■';
    /* Square bullet - professional */
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 400;
    font-size: 0.7rem;
}

.source-list li {
    padding-left: 0;
}

/* Section santé - Academic style */
.health-details-section {
    background: var(--bg-white);
    border-radius: 4px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

.health-details-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: var(--spacing-sm);
}

.health-details-section h3::before {
    content: "Section 2. ";
    font-weight: 700;
}

.health-visual {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.health-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-subtle);
}

.health-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
}

.health-detail-card {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 4px;
    border-left: 3px solid var(--accent-secondary);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-secondary);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

.health-detail-card:hover {
    box-shadow: var(--shadow-md);
}

.health-icon {
    font-size: 2rem;
    /* Smaller, more professional */
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.health-detail-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.health-detail-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xs);
}

.stat-highlight {
    background: rgba(211, 47, 47, 0.08);
    padding: var(--spacing-xs);
    border-radius: 3px;
    border-left: 2px solid var(--accent-secondary);
    font-weight: 500;
    color: var(--text-primary) !important;
    margin-top: var(--spacing-sm) !important;
    font-size: 0.85rem !important;
}

.severity-banner {
    background: var(--accent-secondary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 4px;
    margin-top: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    text-align: left;
    /* Academic - left aligned */
    border-left: 4px solid #a32727;
}

.severity-banner p {
    font-size: 1rem;
    line-height: 1.7;
    margin: 0;
}

/* Section solutions - Academic style */
.solutions-section {
    background: var(--bg-white);
    border-radius: 4px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

.solutions-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: var(--spacing-sm);
}

.solutions-section h3::before {
    content: "Section 3. ";
    font-weight: 700;
}

.solutions-visual {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.solutions-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-subtle);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
}

.solution-card {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 4px;
    border-left: 3px solid var(--chart-green);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--chart-green);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

.solution-card:hover {
    box-shadow: var(--shadow-md);
}

.solution-card.success-story {
    background: rgba(45, 106, 79, 0.05);
    border-left-color: var(--chart-green);
    border-left-width: 4px;
}

.solution-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.solution-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.solution-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.solution-card ul {
    margin-left: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.solution-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xs);
}

.success-highlight {
    background: rgba(45, 106, 79, 0.1);
    padding: var(--spacing-sm);
    border-radius: 3px;
    border-left: 2px solid var(--chart-green);
    font-weight: 600;
    color: var(--accent-primary) !important;
    margin-top: var(--spacing-sm) !important;
    text-align: left;
    /* Academic - left aligned */
    font-size: 0.95rem !important;
}

/* Responsive pour les nouvelles sections */
@media (max-width: 768px) {

    .visual-card,
    .visual-card.reverse {
        grid-template-columns: 1fr;
    }

    .info-image,
    .health-image,
    .solutions-image {
        max-width: 100%;
    }

    .health-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

/* Health Impact */
.health-impact {
    background: linear-gradient(135deg, rgba(44, 62, 128, 0.05), rgba(201, 64, 64, 0.05));
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease backwards 0.6s;
}

.health-impact h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.impact-card {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    border: 2px solid var(--accent-secondary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.impact-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.impact-stat {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.impact-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Data Analysis */
.data-analysis {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease backwards 0.8s;
}

.data-analysis h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.analysis-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.analysis-section {
    background: rgba(255, 255, 255, 0.5);
    padding: var(--spacing-md);
    border-radius: 16px;
    border-left: 4px solid var(--accent-primary);
}

.analysis-section h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.analysis-section p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.analysis-section ul {
    margin-left: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.analysis-section li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xs);
}

/* Sources */
.sources-card {
    background: linear-gradient(135deg, rgba(44, 62, 128, 0.08), rgba(90, 107, 158, 0.08));
    border-radius: 24px;
    padding: var(--spacing-lg);
    border: 1px solid var(--accent-tertiary);
    animation: fadeInUp 0.8s ease backwards 1s;
}

.sources-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.source-item {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: 12px;
    margin-bottom: var(--spacing-sm);
}

.source-item:last-child {
    margin-bottom: 0;
}

.source-item strong {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 1rem;
}

.source-item p {
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.source-item a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.source-item a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Fade in animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .scientific-section {
        padding: var(--spacing-md) 0;
    }

    .info-grid,
    .impact-grid {
        grid-template-columns: 1fr;
    }

    .impact-stat {
        font-size: 2.5rem;
    }

    #timelineChart,
    #healthCorrelation,
    #economicBubble {
        min-height: 300px;
    }
}