/* Design System Variables */
:root {
    --bg-primary: #F9F6F0; /* Classic warm cream */
    --bg-secondary: #FFFFFF;
    --text-main: #2C1E15; /* Coffee brown */
    --text-light: #5A4B41;
    --text-white: #FFFFFF;
    --color-primary: #0B3A22; /* Deep ESG Forest Green */
    --color-olive: #4A6B53; /* Elegant Olive Green */
    --color-gold: #C5A880; /* Luxurious Muted Gold */
    --color-terracotta: #D05A3F; /* Basalt soil Terracotta / Burnt Orange */
    --color-dark: #121A16;
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-serif: 'Lora', Georgia, Cambria, "Times New Roman", Times, serif;
    --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.3s ease;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-serif);
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
    line-height: 1.75;
}

/* Scroll Progress Bar */
.progress-bar-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: rgba(197, 168, 128, 0.2);
    z-index: 9999;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-terracotta));
    transition: width 0.1s ease-out;
}

/* Common Layout Elements */
.grid-wrapper {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }

/* HERO COVER SECTION RE-DESIGN */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) 0;
    overflow: hidden;
    background-color: var(--color-dark);
}

.hero-background-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-image {
    width: 100%;
    height: 100%;
    background-image: url('assets/images/hero_cover.png');
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    filter: brightness(0.35) contrast(1.05); /* Darkened for better contrast */
    transition: transform 12s cubic-bezier(0.1, 1, 0.1, 1);
}

.hero-section:hover .hero-image {
    transform: scale(1.0);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(18, 26, 22, 0.2) 0%, 
        rgba(18, 26, 22, 0.6) 70%, 
        var(--bg-primary) 100%);
    pointer-events: none;
}

/* Hero Grid Layout */
.hero-grid {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-lg);
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    align-items: center;
}

.hero-left {
    grid-column: span 7;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
    color: var(--text-white);
}

.hero-right {
    grid-column: span 5;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Network Container */
.network-container {
    width: 100%;
    max-width: 440px;
    aspect-ratio: 1;
    position: relative;
    background: rgba(18, 26, 22, 0.45);
    border: 1px solid rgba(197, 168, 128, 0.2);
    border-radius: 50%;
    padding: var(--spacing-md);
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    backdrop-filter: blur(5px);
    opacity: 0.9;
}

.network-svg {
    width: 100%;
    height: 100%;
    display: block;
    overflow: visible;
}

.net-line {
    stroke: var(--color-gold);
    stroke-width: 1.5;
    stroke-dasharray: 6, 6;
    animation: dash-flow 25s linear infinite;
    opacity: 0.7;
}

.line-1 { animation-duration: 20s; }
.line-2 { animation-duration: 15s; }
.line-3 { animation-duration: 18s; }
.line-4 { animation-duration: 22s; }

@keyframes dash-flow {
    to {
        stroke-dashoffset: -500;
    }
}

.node-circle-outer {
    fill: none;
    stroke: rgba(197, 168, 128, 0.3);
    stroke-width: 1;
}

.node-circle-inner {
    fill: rgba(11, 58, 34, 0.85);
    stroke: var(--color-gold);
    stroke-width: 1.5;
    transition: var(--transition-fast);
}

.main-node {
    stroke: var(--color-terracotta);
    stroke-width: 2;
}

.main-node-inner {
    fill: rgba(208, 90, 63, 0.9);
    stroke: #FFF;
    stroke-width: 2;
}

.node-label {
    fill: var(--text-white);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    text-anchor: middle;
    letter-spacing: 0.05em;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.8));
}

.highlight-label {
    font-size: 18px;
    font-weight: 700;
    fill: var(--color-gold);
}

.node-icon-path {
    fill: none;
    stroke: var(--color-gold);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.node-icon-path.main {
    stroke: #FFF;
    stroke-width: 2;
}

.active-pulse .node-circle-outer {
    stroke: var(--color-terracotta);
    animation: active-pulse-anim 3s infinite ease-in-out;
}

@keyframes active-pulse-anim {
    0% {
        transform: scale(0.9);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.3);
        opacity: 0.8;
    }
    100% {
        transform: scale(0.9);
        opacity: 0.3;
    }
}

/* Centered Text Layout */
.article-text-centered {
    grid-column: 3 / span 8;
}

@media screen and (max-width: 1024px) {
    .article-text-centered {
        grid-column: 2 / span 10;
    }
}

@media screen and (max-width: 768px) {
    .article-text-centered {
        grid-column: span 12;
        padding-right: 0;
        padding-left: 0;
    }
}

.magazine-tag {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--color-gold);
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.hero-title {
    font-family: var(--font-sans);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
    color: #FFFFFF;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 20px rgba(18, 26, 22, 0.8);
    letter-spacing: -0.02em;
}

.hero-separator {
    width: 80px;
    height: 4px;
    background-color: var(--color-terracotta);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.95);
    max-width: 750px;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-scroll-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gold);
    cursor: pointer;
    opacity: 0.85;
    transition: var(--transition-fast);
}

.hero-scroll-btn:hover {
    opacity: 1;
    transform: translateY(3px);
}

.scroll-arrow {
    font-size: 1.2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-5px); }
    60% { transform: translateY(-3px); }
}

/* ARTICLE CONTAINER & SECTION LAYOUTS */
.article-container {
    position: relative;
    z-index: 5;
    background-color: var(--bg-primary);
    padding-top: var(--spacing-md);
}

/* Opening Section (Opening Spread) */
.opening-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-primary);
}

.opening-text-block {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-right: var(--spacing-lg);
}

.lead-paragraph {
    font-size: 1.5rem;
    line-height: 1.65;
    font-weight: 400;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--color-gold);
}

.opening-icons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.op-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    border: 1px solid rgba(197, 168, 128, 0.15);
    flex: 1;
    transition: var(--transition-fast);
}

.op-icon-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-gold);
    box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.op-icon {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.op-icon-desc {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 0.02em;
}

.opening-media-block {
    display: flex;
    align-items: center;
}

.panorama-image-container {
    width: 100%;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    border-radius: 4px;
    overflow: hidden;
}

.panorama-image {
    width: 100%;
    height: 380px;
    background-image: url('assets/images/opening_spread.png');
    background-size: cover;
    background-position: center;
}

.media-caption {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--text-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-top: 1px solid rgba(0,0,0,0.05);
    font-style: italic;
}

/* SECTION TÍT XEN (MINI COVERS) */
.section-divider-cover {
    position: relative;
    width: 100%;
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: var(--spacing-lg);
    background-color: var(--color-primary);
}

.divider-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.5);
    transform: scale(1.02);
    transition: transform 10s ease;
}

.section-divider-cover:hover .divider-bg {
    transform: scale(1.0);
}

#part1-cover-img { background-image: url('assets/images/part1_cover.png'); }
#part2-cover-img { background-image: url('assets/images/part2_cover.png'); }
#part3-cover-img { background-image: url('assets/images/part3_cover.png'); }

.divider-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(18, 26, 22, 0.4) 0%, 
        rgba(18, 26, 22, 0.6) 100%);
}

/* Colors custom for Section Tít xen */
.sec-1-color { border-top: 5px solid var(--color-olive); }
.sec-2-color { border-top: 5px solid var(--color-gold); }
.sec-3-color { border-top: 5px solid var(--color-terracotta); }

.divider-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--text-white);
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.section-number {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--color-gold);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-sans);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: -0.01em;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

/* CONTENT WRAPPER & TEXT LAYOUTS */
.content-wrapper {
    background-color: var(--bg-secondary);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid rgba(197, 168, 128, 0.1);
}

.text-grid {
    margin-bottom: var(--spacing-lg);
}

.side-info {
    padding-right: var(--spacing-md);
    border-right: 1px solid rgba(197, 168, 128, 0.15);
}

.sticky-card {
    position: -webkit-sticky;
    position: sticky;
    top: 80px;
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 4px 4px 0;
}

.card-title {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.card-desc {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-light);
}

.article-text {
    padding-left: var(--spacing-md);
}

.article-text p {
    font-size: 1.15rem;
    line-height: 1.85;
    color: var(--text-main);
    margin-bottom: var(--spacing-md);
}

.article-text p:first-of-type::first-letter {
    font-family: var(--font-sans);
    font-size: 4rem;
    font-weight: 800;
    float: left;
    line-height: 0.8;
    margin-right: 10px;
    margin-top: 5px;
    color: var(--color-primary);
}

/* INFOGRAPHICS STYLING */
.infographic-container {
    max-width: 1000px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.02);
    border: 1px solid rgba(197, 168, 128, 0.12);
}

.full-width-info {
    max-width: 1200px;
    padding: var(--spacing-md) var(--spacing-lg);
}

.info-title {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid rgba(197, 168, 128, 0.3);
}

/* Sơ đồ chuỗi liên kết (Part 1 - Flow Chart) */
.flow-chart-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.flow-step {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid rgba(197, 168, 128, 0.2);
    border-radius: 6px;
    padding: var(--spacing-sm) var(--spacing-xs);
    text-align: center;
    transition: var(--transition-fast);
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
}

.flow-step:hover {
    transform: translateY(-5px);
    border-color: var(--color-gold);
    box-shadow: 0 8px 20px rgba(197, 168, 128, 0.15);
}

.highlighted-step {
    border: 2px solid var(--color-terracotta) !important;
    background-color: rgba(208, 90, 63, 0.03) !important;
}

.step-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.step-name {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.step-desc {
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-light);
}

.flow-arrow {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    color: var(--color-gold);
    font-weight: bold;
    user-select: none;
}

/* Các chỉ số nổi bật (Part 1 - Stats Grid) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(197, 168, 128, 0.15);
    padding: var(--spacing-md) var(--spacing-sm);
    border-radius: 6px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: var(--transition-fast);
}

.stat-card:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.04);
    transform: scale(1.02);
}

.stat-card.emphasis {
    background: linear-gradient(135deg, rgba(208, 90, 63, 0.05) 0%, rgba(197, 168, 128, 0.05) 100%);
    border: 1.5px solid rgba(208, 90, 63, 0.25);
}

.stat-num {
    font-family: var(--font-sans);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-terracotta);
    line-height: 1.1;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.stat-card.emphasis .stat-num {
    color: var(--color-primary);
}

.stat-label {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
    line-height: 1.4;
}

/* Milestone Chart (Part 2) */
.milestone-chart {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.milestone-item {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid rgba(197, 168, 128, 0.15);
    padding: var(--spacing-md) var(--spacing-xs);
    border-radius: 4px;
    text-align: center;
    transition: var(--transition-fast);
}

.milestone-item:hover {
    transform: translateY(-3px);
    border-color: var(--color-olive);
}

.milestone-item.highlighted {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #FFF;
}

.milestone-point {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
}

.milestone-item.highlighted .milestone-point {
    color: var(--color-gold);
}

.milestone-label {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-light);
    display: block;
    margin-top: 4px;
}

.milestone-item.highlighted .milestone-label {
    color: rgba(255,255,255,0.8);
}

.milestone-connector {
    color: var(--color-gold);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Ecosystem SVG (Part 2) */
.eco-cycle-wrapper {
    width: 100%;
    overflow-x: auto;
    margin-top: var(--spacing-md);
}

.eco-cycle-svg {
    width: 100%;
    min-width: 780px;
    height: auto;
    display: block;
}

.eco-node rect {
    fill: var(--bg-secondary);
    stroke: rgba(197, 168, 128, 0.25);
    stroke-width: 1.5;
    transition: var(--transition-fast);
}

.eco-node:hover rect {
    fill: rgba(197, 168, 128, 0.05);
    stroke: var(--color-gold);
}

.eco-node.highlighted rect {
    fill: var(--color-primary);
    stroke: var(--color-primary);
}

.eco-node.highlighted .eco-text {
    fill: #FFF;
}

.eco-node.highlighted .eco-text-sub {
    fill: var(--color-gold);
}

.eco-text {
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 700;
    fill: var(--color-primary);
    text-anchor: middle;
}

.eco-text-sub {
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 500;
    fill: var(--text-light);
    text-anchor: middle;
}

.eco-arrow {
    stroke: var(--color-gold);
    stroke-width: 2;
    fill: none;
    marker-end: url(#arrow-marker);
}

/* Shield Grid (Part 3 - Intellectual Property) */
.intellectual-shield-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.shield-item {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid rgba(197, 168, 128, 0.15);
    padding: var(--spacing-md) var(--spacing-xs);
    border-radius: 6px;
    text-align: center;
    transition: var(--transition-fast);
}

.shield-item:hover {
    transform: translateY(-5px);
    border-color: var(--color-terracotta);
    box-shadow: 0 8px 20px rgba(208, 90, 63, 0.1);
}

.shield-item.highlighted {
    border: 2px solid var(--color-terracotta);
    background-color: rgba(208, 90, 63, 0.03);
}

.shield-icon {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-xs);
}

.shield-name {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.shield-desc {
    font-size: 0.75rem;
    color: var(--text-light);
    display: block;
    margin-top: 4px;
}

.shield-arrow {
    color: var(--color-gold);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Dashboard Gia Lai (Part 3) */
.gia-lai-dashboard {
    background-color: var(--color-dark);
    color: var(--text-white);
    border: none;
}

.gia-lai-dashboard .info-title {
    color: var(--color-gold);
    border-bottom: 2px solid rgba(197, 168, 128, 0.15);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.db-card {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--spacing-md) var(--spacing-sm);
    border-radius: 6px;
    text-align: center;
    transition: var(--transition-fast);
}

.db-card:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--color-gold);
}

.db-num {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-gold);
    display: block;
    line-height: 1.2;
}

.db-label {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    display: block;
    margin-top: 5px;
}

.db-card.full-span {
    grid-column: span 4;
    background: linear-gradient(135deg, rgba(208, 90, 63, 0.15) 0%, rgba(197, 168, 128, 0.05) 100%);
    border: 1px solid rgba(208, 90, 63, 0.3);
}

.db-card.full-span .db-num {
    font-size: 2.8rem;
    color: var(--color-terracotta);
}

/* MEDIA & IMAGE SECTION */
.part-media-grid {
    margin: var(--spacing-lg) auto;
}

.grid-img-large {
    width: 100%;
    height: 480px;
    background-size: cover;
    background-position: center;
    border-radius: 4px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.06);
}

#part1-extra-img { background-image: url('assets/images/part1_extra.png'); }
#part2-extra-img { background-image: url('assets/images/part2_extra.png'); }
#part3-extra-img { background-image: url('assets/images/part3_extra.png'); }

.flex-caption {
    display: flex;
    align-items: center;
}

.editorial-note {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-light);
    border-left: 2px solid var(--color-terracotta);
    padding-left: var(--spacing-sm);
    font-style: italic;
}

/* PREMIUM QUOTE BOX */
.quote-box-container {
    max-width: 900px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-md);
}

.premium-quote {
    position: relative;
    padding: var(--spacing-md) var(--spacing-lg);
}

.quote-mark {
    font-family: var(--font-sans);
    font-size: 6rem;
    font-weight: 800;
    line-height: 1;
    color: rgba(197, 168, 128, 0.25);
    position: absolute;
    user-select: none;
}

.quote-mark.left {
    top: -20px;
    left: -20px;
}

.quote-mark.right {
    bottom: -60px;
    right: -20px;
}

.quote-text {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-style: italic;
    line-height: 1.5;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.quote-author {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-terracotta);
    display: block;
}

/* CLOSING SPREAD SECTION */
.closing-spread-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    overflow: hidden;
    padding: var(--spacing-lg);
}

.closing-background-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.closing-image {
    width: 100%;
    height: 100%;
    background-image: url('assets/images/closing_spread.png');
    background-size: cover;
    background-position: center;
    filter: brightness(0.6);
}

.closing-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg, 
        rgba(18, 26, 22, 0.95) 0%, 
        rgba(18, 26, 22, 0.6) 40%, 
        rgba(18, 26, 22, 0.1) 100%);
    pointer-events: none;
}

/* Đồ họa chìm nhẹ */
.closing-flow-overlay {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 1100px;
    z-index: 2;
    text-align: center;
    opacity: 0.8;
}

.closing-flow-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.cf-item {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    color: rgba(255,255,255,0.65);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 8px 16px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 4px;
    background-color: rgba(0,0,0,0.2);
}

.cf-item.highlight {
    color: var(--color-gold);
    border-color: var(--color-gold);
    background-color: rgba(11, 58, 34, 0.4);
    box-shadow: 0 0 15px rgba(197, 168, 128, 0.2);
}

.cf-arrow {
    color: rgba(197, 168, 128, 0.5);
    font-weight: bold;
}

.closing-content {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: flex-end;
}

.closing-signature {
    text-align: right;
    color: var(--text-white);
    border-right: 3px solid var(--color-gold);
    padding-right: var(--spacing-sm);
}

.author-label {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    color: var(--color-gold);
    text-transform: uppercase;
}

.author-name {
    font-family: var(--font-sans);
    font-size: 1.8rem;
    font-weight: 800;
    margin-top: 4px;
}

/* FOOTER */
.main-footer {
    background-color: var(--color-dark);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--spacing-lg) 0;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-copyright {
    font-weight: 500;
}

.footer-design {
    color: rgba(255, 255, 255, 0.4);
}

/* INTERACTIVE SCROLL ANIMATION CLASS */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.appear {
    opacity: 1;
    transform: translateY(0);
}

/* RESPONSIVE DESIGN (TABLETS & MOBILE) */
@media screen and (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
        padding-top: var(--spacing-md);
    }
    
    .hero-left {
        grid-column: span 12;
        text-align: center;
        align-items: center;
    }
    
    .hero-right {
        grid-column: span 12;
        margin-top: var(--spacing-md);
        display: flex;
        justify-content: center;
    }
    
    .network-container {
        max-width: 320px;
        margin: 0 auto;
    }

    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2.8rem;
    }
    
    .flow-chart-wrapper, .intellectual-shield-grid {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .flow-step, .shield-item {
        flex: unset;
        width: calc(50% - var(--spacing-md));
        min-width: 200px;
    }
    
    .flow-arrow, .shield-arrow {
        display: none;
    }
    
    .milestone-chart {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .milestone-item {
        flex: unset;
        width: calc(33.33% - var(--spacing-sm));
        min-width: 130px;
    }
    
    .milestone-connector {
        display: none;
    }
}

@media screen and (max-width: 768px) {
    .grid-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .col-8, .col-6, .col-4 {
        grid-column: span 1;
    }
    
    .opening-text-block {
        padding-right: 0;
    }
    
    .opening-media-block {
        margin-top: var(--spacing-md);
    }
    
    .side-info {
        border-right: none;
        border-bottom: 1px solid rgba(197, 168, 128, 0.15);
        padding-right: 0;
        padding-bottom: var(--spacing-md);
    }
    
    .article-text {
        padding-left: 0;
        margin-top: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .db-card.full-span {
        grid-column: span 2;
    }
    
    /* Responsive Hero adjustments */
    .hero-section {
        height: auto;
        min-height: 100vh;
        padding: 100px 0 50px 0;
        display: flex;
        align-items: center;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .hero-left {
        grid-column: span 12;
        text-align: center;
        align-items: center;
        padding: 0 var(--spacing-sm);
    }

    .hero-right {
        grid-column: span 12;
        margin-top: var(--spacing-sm);
        display: flex;
        justify-content: center;
    }

    .network-container {
        max-width: 280px;
        margin: 0 auto;
        padding: var(--spacing-sm);
    }

    .node-label {
        font-size: 11px !important;
    }

    .highlight-label {
        font-size: 13px !important;
    }
    
    .hero-title {
        font-size: 2.0rem;
        line-height: 1.25;
        margin-bottom: var(--spacing-sm);
    }

    .hero-subtitle {
        font-size: 1.1rem;
        line-height: 1.6;
        margin-bottom: var(--spacing-md);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .premium-quote {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .quote-text {
        font-size: 1.4rem;
    }
    
    .grid-img-large {
        height: 300px;
    }
    
    .opening-icons {
        flex-wrap: wrap;
    }
    
    .op-icon-item {
        width: calc(50% - var(--spacing-xs));
        flex: unset;
    }
    
    .closing-flow-container {
        gap: 8px;
    }
    
    .cf-item {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
    
    .cf-arrow {
        display: none;
    }
}

@media screen and (max-width: 480px) {
    .stats-grid, .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .db-card.full-span {
        grid-column: span 1;
    }
    
    .flow-step, .shield-item {
        width: 100%;
    }
    
    .milestone-item {
        width: calc(50% - var(--spacing-sm));
    }
    
    .op-icon-item {
        width: 100%;
    }

    /* Extra small mobile adjustments */
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.0rem;
    }

    .network-container {
        max-width: 230px;
    }
}