/* ==========================================================================
   VNBUSINESS INTERACTIVE SPECIAL - CORE STYLESHEET
   Thiết kế chuẩn báo chí đa phương tiện cao cấp
   ========================================================================== */

:root {
  /* Bảng màu nhận diện VnBusiness */
  --vn-navy-900: #0a192f;
  --vn-navy-800: #0f2b48;
  --vn-navy-700: #1a3c63;
  --vn-blue-brand: #005696;
  --vn-blue-light: #e8f2fa;
  --vn-red-brand: #c8102e;
  --vn-green-agri: #1e7042;
  --vn-green-light: #eaf6ee;
  --vn-gold-accent: #d97706;
  --vn-gold-light: #fef3c7;

  /* Theme sáng mặc định */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-infographic: #ffffff;
  --bg-infographic-accent: #f1f7fc;
  --border-color: #e2e8f0;
  --border-focus: #005696;
  
  --text-main: #1e293b;
  --text-muted: #475569;
  --text-light: #64748b;
  --text-heading: #0a192f;
  --text-accent: #005696;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 6px 18px rgba(15, 43, 72, 0.08);
  --shadow-lg: 0 16px 36px rgba(15, 43, 72, 0.12);

  /* Typography scale */
  --font-serif: 'Merriweather', 'Lora', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Lora', Georgia, serif;

  --reader-font-scale: 1;
  --container-max-w: 860px;
  --infographic-max-w: 1040px;
}

/* Theme tối (Dark Mode) */
body[data-theme="dark"] {
  --bg-primary: #070d18;
  --bg-surface: #0e1726;
  --bg-card: #142033;
  --bg-infographic: #101c2e;
  --bg-infographic-accent: #17273f;
  --border-color: #1f324d;
  --border-focus: #38bdf8;

  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --text-heading: #f8fafc;
  --text-accent: #38bdf8;

  --vn-green-light: #0d281a;
  --vn-gold-light: #2c2006;
  --vn-blue-light: #0d233a;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.6);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   PROGRESS BAR
   ========================================================================== */
#progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  z-index: 1000;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--vn-blue-brand), #0284c7, var(--vn-green-agri));
  transition: width 0.1s linear;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.top-nav {
  position: sticky;
  top: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  z-index: 990;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.top-nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-zone {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  text-decoration: none;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
}

.logo-vn {
  color: var(--vn-red-brand);
  font-weight: 900;
}

.logo-biz {
  color: var(--vn-blue-brand);
  font-weight: 800;
}

body[data-theme="dark"] .logo-biz {
  color: #38bdf8;
}

.header-divider {
  width: 1px;
  height: 22px;
  background-color: var(--border-color);
}

.mag-badge {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--vn-gold-accent);
  background: var(--vn-gold-light);
  padding: 4px 10px;
  border-radius: 4px;
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tool-btn {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 6px;
  cursor: pointer;
  padding: 6px 12px;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background: var(--vn-blue-light);
  border-color: var(--vn-blue-brand);
  color: var(--vn-blue-brand);
}

.text-resizer {
  display: flex;
  align-items: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 2px;
}

.text-resizer .tool-btn {
  border: none;
  background: transparent;
  padding: 4px 8px;
}

.font-indicator {
  font-size: 13px;
  font-weight: 600;
  padding: 0 4px;
  color: var(--text-muted);
}

.theme-btn {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  font-size: 16px;
}

body[data-theme="light"] .dark-icon { display: none; }
body[data-theme="light"] .light-icon { display: inline; }
body[data-theme="dark"] .dark-icon { display: inline; }
body[data-theme="dark"] .light-icon { display: none; }

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 38px;
  height: 38px;
  padding: 8px;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--text-main);
  transition: all 0.2s;
}

/* SUBNAV MỤC LỤC 3 PHẦN */
.quick-subnav {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
}

.subnav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 6px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.subnav-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.subnav-item {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 20px;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.subnav-item .num {
  font-size: 12px;
  font-weight: 700;
  background: var(--border-color);
  color: var(--text-main);
  border-radius: 10px;
  padding: 2px 7px;
}

.subnav-item:hover, .subnav-item.active {
  background: var(--vn-blue-brand);
  color: #ffffff;
}

.subnav-item.active .num, .subnav-item:hover .num {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 60px;
  background: radial-gradient(circle at 50% 10%, rgba(0, 86, 150, 0.08) 0%, transparent 60%),
              linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border-color);
}

body[data-theme="dark"] .hero-section {
  background: radial-gradient(circle at 50% 10%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
              linear-gradient(180deg, #070d18 0%, #0e1726 100%);
}

.hero-content {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.hero-tag-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--vn-blue-light);
  color: var(--vn-blue-brand);
  border: 1px solid rgba(0, 86, 150, 0.15);
  padding: 6px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

body[data-theme="dark"] .hero-tag-wrap {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.3);
}

.hero-category {
  color: var(--vn-green-agri);
  font-weight: 800;
}

body[data-theme="dark"] .hero-category {
  color: #4ade80;
}

.hero-dot {
  opacity: 0.5;
}

.main-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.25;
  color: var(--text-heading);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 32px;
}

/* Sapo */
.sapo-container {
  background: var(--bg-surface);
  border-left: 4px solid var(--vn-blue-brand);
  padding: 24px 30px;
  border-radius: 0 12px 12px 0;
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
  text-align: left;
}

body[data-theme="dark"] .sapo-container {
  border-left-color: #38bdf8;
}

.sapo-paragraph {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.8;
  color: var(--text-main);
  font-weight: 400;
  margin-bottom: 16px;
}

.sapo-paragraph:last-child {
  margin-bottom: 0;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.author-meta {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.author-name {
  font-size: 16px;
  color: var(--text-heading);
}

.author-name strong {
  color: var(--vn-blue-brand);
  font-weight: 700;
}

body[data-theme="dark"] .author-name strong {
  color: #38bdf8;
}

.pub-org {
  font-size: 14px;
  color: var(--text-muted);
}

.scroll-down-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  background: var(--vn-blue-brand);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 86, 150, 0.25);
}

.scroll-down-btn:hover {
  background: var(--vn-navy-800);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 86, 150, 0.35);
}

.scroll-arrow {
  font-size: 16px;
  transition: transform 0.2s ease;
}

.scroll-down-btn:hover .scroll-arrow {
  transform: translateY(2px);
}

/* ==========================================================================
   ARTICLE BODY & SECTIONS
   ========================================================================== */
.article-body {
  max-width: var(--container-max-w);
  margin: 0 auto;
  padding: 60px 24px;
}

.content-section {
  margin-bottom: 70px;
  position: relative;
}

.section-marker {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.part-number {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--vn-gold-accent);
  background: var(--vn-gold-light);
  padding: 4px 12px;
  border-radius: 4px;
}

.marker-line {
  flex-grow: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--border-color), transparent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.8vw, 36px);
  line-height: 1.35;
  color: var(--text-heading);
  font-weight: 700;
  margin-bottom: 28px;
}

/* Paragraph text */
.story-content {
  font-family: var(--font-serif);
  font-size: calc(18px * var(--reader-font-scale));
  line-height: 1.88;
  color: var(--text-main);
  margin-bottom: 30px;
}

.paragraph {
  margin-bottom: 24px;
}

.dropcap-p::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 58px;
  line-height: 0.85;
  padding-top: 4px;
  padding-right: 12px;
  padding-bottom: 2px;
  font-weight: 700;
  color: var(--vn-blue-brand);
}

body[data-theme="dark"] .dropcap-p::first-letter {
  color: #38bdf8;
}

/* Quote box */
.story-quote {
  margin: 36px 0;
  padding: 24px 30px;
  background: var(--bg-surface);
  border-left: 4px solid var(--vn-gold-accent);
  border-radius: 0 10px 10px 0;
  box-shadow: var(--shadow-sm);
}

.quote-text {
  font-style: italic;
  font-size: 20px;
  line-height: 1.7;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.quote-author {
  display: block;
  font-size: 16px;
  font-style: normal;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

/* Separator between sections */
.section-separator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 60px 0;
  position: relative;
}

.section-separator::before,
.section-separator::after {
  content: '';
  height: 1px;
  width: 120px;
  background: var(--border-color);
}

.separator-gem {
  color: var(--vn-blue-brand);
  padding: 0 16px;
  font-size: 14px;
}

/* ==========================================================================
   MEDIA / PHOTO FIGURE
   ========================================================================== */
.media-figure {
  margin: 44px 0;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
}

@media (min-width: 900px) {
  .media-figure {
    width: min(1140px, calc(100vw - 48px));
    margin-left: calc((min(1140px, calc(100vw - 48px)) - 100%) / -2);
    margin-right: calc((min(1140px, calc(100vw - 48px)) - 100%) / -2);
    border-radius: 18px;
  }
}

.figure-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #111;
  overflow: hidden;
}

.responsive-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.media-figure:hover .responsive-img {
  transform: scale(1.025);
}

.photo-caption {
  padding: 16px 24px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  background: var(--bg-surface);
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.caption-badge {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  background: var(--vn-blue-brand);
  color: #ffffff;
  padding: 3px 8px;
  border-radius: 3px;
  flex-shrink: 0;
}

/* ==========================================================================
   INFOGRAPHICS - QUY TẮC CỐT LÕI:
   - MỞ RỘNG SANG 2 BÊN TỐI ƯU KHÔNG GIAN TRÌNH BÀY
   - ÍT CHỮ, GIÀU TÍNH DỮ LIỆU
   - FONT SIZE TỐI THIỂU 18PX TRỞ LÊN KỂ CẢ TRÊN MOBILE!
   ========================================================================== */
.infographic-container {
  margin: 50px 0;
  padding: 36px 28px;
  background: var(--bg-infographic);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

@media (min-width: 900px) {
  .infographic-container {
    width: min(1200px, calc(100vw - 48px));
    margin-left: calc((min(1200px, calc(100vw - 48px)) - 100%) / -2);
    margin-right: calc((min(1200px, calc(100vw - 48px)) - 100%) / -2);
    padding: 44px 40px;
    border-radius: 20px;
  }
}

/* Đảm bảo toàn bộ chữ bên trong Infographic tối thiểu 18px */
.infographic-container,
.infographic-container * {
  font-size: max(18px, inherit);
}

.info-header {
  text-align: center;
  margin-bottom: 28px;
}

.info-tag {
  display: inline-block;
  font-size: 18px !important;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--vn-blue-brand);
  background: var(--vn-blue-light);
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 12px;
}

body[data-theme="dark"] .info-tag {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.15);
}

.info-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.8vw, 32px) !important;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 10px;
}

.info-subtitle {
  font-size: 19px !important;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 920px;
  margin: 0 auto;
}

.info-footnote {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-color);
  font-size: 18px !important;
  color: var(--text-light);
  font-style: italic;
  text-align: center;
}

/* --------------------------------------------------------------------------
   INFOGRAPHIC 1: THANH CHỈ SỐ NGANG & MA TRẬN 3 TRỤ CỘT
   -------------------------------------------------------------------------- */
.chain-metrics-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}

.chain-metric-pod {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  cursor: pointer;
}

.chain-metric-pod:hover, .chain-metric-pod:focus {
  transform: translateY(-3px);
  border-color: var(--vn-blue-brand);
  box-shadow: var(--shadow-md);
  outline: none;
}

.pod-num {
  font-family: var(--font-display);
  font-size: 32px !important;
  font-weight: 900;
  color: var(--vn-blue-brand);
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
}

body[data-theme="dark"] .pod-num {
  color: #38bdf8;
}

.pod-text {
  display: flex;
  flex-direction: column;
}

.pod-title {
  font-size: 19px !important;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.25;
}

.pod-sub {
  font-size: 18px !important;
  color: var(--text-muted);
  line-height: 1.35;
}

.highlight-pod {
  background: linear-gradient(135deg, var(--vn-green-light) 0%, var(--bg-surface) 100%);
  border-color: var(--vn-green-agri);
}

.highlight-pod .pod-num {
  color: var(--vn-green-agri);
}

body[data-theme="dark"] .highlight-pod .pod-num {
  color: #4ade80;
}

/* Header phân định dòng chảy */
.chain-flow-bridge-header {
  text-align: center;
  position: relative;
  margin: 10px 0 20px;
}

.chain-flow-bridge-header::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-color);
  z-index: 1;
}

.bridge-tag {
  position: relative;
  z-index: 2;
  display: inline-block;
  background: var(--bg-infographic);
  padding: 4px 18px;
  font-size: 18px !important;
  font-weight: 800;
  color: var(--vn-navy-800);
  border: 1px dashed var(--border-color);
  border-radius: 20px;
  letter-spacing: 0.5px;
}

body[data-theme="dark"] .bridge-tag {
  color: #94a3b8;
}

/* Bảng ma trận 3 trụ cột */
.chain-matrix-board {
  display: grid;
  grid-template-columns: 1fr 100px 1.15fr 100px 1fr;
  align-items: stretch;
  gap: 10px;
  margin-bottom: 20px;
}

.matrix-pillar {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 14px;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.matrix-pillar:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pillar-center {
  border-color: var(--vn-blue-brand);
  background: linear-gradient(180deg, var(--bg-infographic-accent) 0%, var(--bg-surface) 100%);
  box-shadow: 0 4px 16px rgba(0, 86, 150, 0.12);
}

body[data-theme="dark"] .pillar-center {
  border-color: #38bdf8;
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.08) 0%, var(--bg-surface) 100%);
}

.pillar-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 16px;
}

.head-center {
  flex-direction: column;
  text-align: center;
  gap: 6px;
}

.pillar-icon {
  font-size: 38px !important;
  line-height: 1;
}

.pillar-info {
  display: flex;
  flex-direction: column;
}

.center-star-badge {
  font-size: 18px !important;
  font-weight: 800;
  color: var(--vn-gold-accent);
  background: var(--vn-gold-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

body[data-theme="dark"] .center-star-badge {
  background: rgba(217, 119, 6, 0.25);
  color: #fbbf24;
}

.pillar-title {
  font-size: 22px !important;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.3;
}

.pillar-sub-role {
  font-size: 18px !important;
  color: var(--text-muted);
  line-height: 1.35;
}

.pillar-section {
  flex-grow: 1;
  margin-bottom: 16px;
}

.pillar-sec-title {
  font-size: 18px !important;
  font-weight: 800;
  color: var(--vn-navy-800);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

body[data-theme="dark"] .pillar-sec-title {
  color: #94a3b8;
}

.pillar-duties {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pillar-duties li {
  font-size: 18px !important;
  line-height: 1.45;
  color: var(--text-main);
  position: relative;
  padding-left: 22px;
}

.pillar-duties li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--vn-green-agri);
  font-weight: bold;
  font-size: 18px !important;
}

.pillar-benefit {
  padding: 12px 14px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.benefit-label {
  font-size: 18px !important;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.benefit-desc {
  font-size: 18px !important;
  line-height: 1.45;
}

.benefit-green {
  background: var(--vn-green-light);
  color: #15803d;
  border-left: 4px solid var(--vn-green-agri);
}

body[data-theme="dark"] .benefit-green {
  color: #4ade80;
}

.benefit-blue {
  background: var(--vn-blue-light);
  color: var(--vn-blue-brand);
  border-left: 4px solid var(--vn-blue-brand);
}

body[data-theme="dark"] .benefit-blue {
  color: #38bdf8;
  border-left-color: #38bdf8;
}

.benefit-gold {
  background: var(--vn-gold-light);
  color: #b45309;
  border-left: 4px solid var(--vn-gold-accent);
}

body[data-theme="dark"] .benefit-gold {
  color: #fbbf24;
}

/* Cầu nối trực quan giữa các cột */
.matrix-bridge {
  display: flex;
  align-items: center;
  justify-content: center;
}

.bridge-flow-box {
  background: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  padding: 10px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  width: 100%;
}

.bridge-arrow-top, .bridge-arrow-bot {
  font-size: 18px !important;
  font-weight: 700;
  color: var(--vn-blue-brand);
  line-height: 1.3;
}

body[data-theme="dark"] .bridge-arrow-top,
body[data-theme="dark"] .bridge-arrow-bot {
  color: #38bdf8;
}

.bridge-mid-badge {
  font-size: 18px !important;
  font-weight: 800;
  background: var(--border-color);
  color: var(--text-heading);
  padding: 4px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

body[data-theme="dark"] .connector-label {
  color: #38bdf8;
}

.connector-arrow {
  font-size: 24px !important;
  color: var(--vn-blue-brand);
}

@media (max-width: 899px) {
  .connector-arrow {
    transform: rotate(90deg);
  }
}

/* --------------------------------------------------------------------------
   INFOGRAPHIC 2: STATS RIBBON & VALUE PYRAMID
   -------------------------------------------------------------------------- */
.stats-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 34px;
}

.stat-pill {
  flex: 1 1 240px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.pill-number {
  display: block;
  font-family: var(--font-display);
  font-size: 34px !important;
  font-weight: 900;
  color: var(--vn-green-agri);
  margin-bottom: 4px;
}

body[data-theme="dark"] .pill-number {
  color: #4ade80;
}

.pill-label {
  font-size: 19px !important;
  font-weight: 600;
  color: var(--text-muted);
}

/* Tháp giá trị 4 tầng */
.value-pyramid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 30px 0;
}

.pyramid-level {
  background: var(--bg-surface);
  border-radius: 12px;
  border: 2px solid var(--border-color);
  padding: 22px 24px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.pyramid-level:hover, .pyramid-level:focus {
  transform: translateX(6px);
  border-color: var(--vn-blue-brand);
  box-shadow: var(--shadow-md);
  outline: none;
}

.level-4 {
  border-left: 8px solid #8b5cf6;
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.08) 0%, var(--bg-surface) 100%);
}

.level-3 {
  border-left: 8px solid var(--vn-green-agri);
  background: linear-gradient(90deg, rgba(30, 112, 66, 0.08) 0%, var(--bg-surface) 100%);
}

.level-2 {
  border-left: 8px solid var(--vn-blue-brand);
  background: linear-gradient(90deg, rgba(0, 86, 150, 0.08) 0%, var(--bg-surface) 100%);
}

.level-1 {
  border-left: 8px solid var(--vn-gold-accent);
  background: linear-gradient(90deg, rgba(217, 119, 6, 0.08) 0%, var(--bg-surface) 100%);
}

.level-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.level-num {
  font-size: 18px !important;
  font-weight: 900;
  color: #ffffff;
  background: var(--vn-navy-800);
  padding: 4px 12px;
  border-radius: 4px;
  letter-spacing: 1px;
}

.level-4 .level-num { background: #8b5cf6; }
.level-3 .level-num { background: var(--vn-green-agri); }
.level-2 .level-num { background: var(--vn-blue-brand); }
.level-1 .level-num { background: var(--vn-gold-accent); }

.level-heading {
  font-size: 20px !important;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.4;
}

.level-body p {
  font-size: 18px !important;
  line-height: 1.6;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   INFOGRAPHIC 3: TARGET BOX & VALUE SHIFT FLOW
   -------------------------------------------------------------------------- */
.target-card-box {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 14px;
  padding: 28px 24px;
  margin-bottom: 36px;
}

.target-box-title {
  text-align: center;
  font-size: 20px !important;
  font-weight: 800;
  color: var(--vn-blue-brand);
  letter-spacing: 0.5px;
  margin-bottom: 24px;
  text-transform: uppercase;
}

body[data-theme="dark"] .target-box-title {
  color: #38bdf8;
}

.target-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.target-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 22px 18px;
  text-align: center;
  transition: all 0.3s ease;
}

.target-item:hover {
  transform: translateY(-4px);
  border-color: var(--vn-gold-accent);
}

.target-num {
  font-family: var(--font-display);
  font-size: 42px !important;
  font-weight: 900;
  color: var(--vn-gold-accent);
  line-height: 1.1;
  margin-bottom: 6px;
}

.target-title {
  font-size: 18px !important;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.target-sub {
  font-size: 18px !important;
  color: var(--text-muted);
  line-height: 1.45;
}

.highlight-target {
  background: var(--vn-blue-light);
  border-color: var(--vn-blue-brand);
}

body[data-theme="dark"] .highlight-target {
  background: rgba(0, 86, 150, 0.25);
  border-color: #38bdf8;
}

.highlight-target .target-num {
  color: var(--vn-blue-brand);
}

body[data-theme="dark"] .highlight-target .target-num {
  color: #38bdf8;
}

/* SƠ ĐỒ CHUYỂN DỊCH GIÁ TRỊ */
.value-shift-container {
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 14px;
  padding: 30px 24px;
}

.shift-flow-title {
  font-size: 21px !important;
  font-weight: 800;
  text-align: center;
  color: var(--text-heading);
  margin-bottom: 26px;
}

.shift-comparison {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (min-width: 900px) {
  .shift-comparison {
    flex-direction: row;
    align-items: stretch;
  }
}

.shift-col {
  flex: 1;
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.col-old {
  background: rgba(239, 68, 68, 0.05);
  border: 2px solid #ef4444;
}

.col-new {
  background: rgba(34, 197, 94, 0.06);
  border: 2px solid #22c55e;
}

.col-badge {
  font-size: 18px !important;
  font-weight: 800;
  text-align: center;
  padding: 8px 12px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}

.badge-old {
  background: #ef4444;
  color: #ffffff;
}

.badge-new {
  background: #22c55e;
  color: #ffffff;
}

.col-step {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.step-num {
  font-size: 20px !important;
  font-weight: 900;
  color: var(--vn-navy-800);
  background: var(--border-color);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
}

body[data-theme="dark"] .step-num {
  color: #ffffff;
}

.step-text {
  font-size: 18px !important;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
}

.col-down-arrow {
  text-align: center;
  font-size: 24px !important;
  color: var(--text-light);
  line-height: 1;
}

.col-result {
  margin-top: auto;
  padding: 16px;
  border-radius: 8px;
  font-size: 18px !important;
  line-height: 1.5;
}

.result-negative {
  background: rgba(239, 68, 68, 0.12);
  color: #b91c1c;
}

body[data-theme="dark"] .result-negative {
  color: #f87171;
}

.result-positive {
  background: rgba(34, 197, 94, 0.15);
  color: #15803d;
}

body[data-theme="dark"] .result-positive {
  color: #4ade80;
}

.shift-middle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
  gap: 8px;
}

.shift-icon {
  font-size: 32px !important;
  color: var(--vn-green-agri);
}

@media (max-width: 899px) {
  .shift-icon {
    transform: rotate(90deg);
  }
}

.shift-text-note {
  font-size: 18px !important;
  font-weight: 800;
  color: var(--vn-green-agri);
  text-align: center;
  letter-spacing: 0.5px;
}

body[data-theme="dark"] .shift-text-note {
  color: #4ade80;
}

/* ==========================================================================
   AUTHOR SIGNATURE & EDITORIAL BOX
   ========================================================================== */
.author-signature {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.sign-line {
  width: 90px;
  height: 2px;
  background: var(--vn-blue-brand);
  margin-bottom: 12px;
}

.sign-content {
  text-align: right;
}

.sign-role {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.sign-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-heading);
}

.editorial-box-wrap {
  max-width: var(--container-max-w);
  margin: 0 auto 60px;
  padding: 0 24px;
}

.editorial-box {
  background: var(--bg-surface);
  border: 2px solid var(--vn-blue-brand);
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.editorial-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: #ffffff;
  background: var(--vn-blue-brand);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.editorial-title {
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.editorial-text {
  font-size: 18px;
  line-height: 1.75;
  color: var(--text-main);
  margin-bottom: 24px;
}

.editorial-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-back-top, .btn-share {
  text-decoration: none;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-back-top:hover, .btn-share:hover {
  background: var(--vn-blue-brand);
  color: #ffffff;
  border-color: var(--vn-blue-brand);
}

/* ==========================================================================
   SITE FOOTER
   ========================================================================== */
.site-footer {
  background: var(--vn-navy-900);
  color: #94a3b8;
  border-top: 1px solid var(--border-color);
  padding: 60px 24px 40px;
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-brand-block {
  max-width: 500px;
}

.footer-logo {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-logo .logo-vn { color: #ef4444; }
.footer-logo .logo-biz { color: #38bdf8; }

.footer-desc {
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 8px;
  color: #cbd5e1;
}

.footer-license {
  font-size: 13px;
  color: #64748b;
}

.footer-copy {
  font-size: 14px;
  line-height: 1.6;
  color: #94a3b8;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ========================================================================== */
@media (max-width: 1080px) {
  .chain-matrix-board {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .matrix-bridge {
    display: none;
  }

  .chain-metrics-ribbon {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .brand-logo {
    font-size: 22px;
  }

  .mag-badge {
    display: none;
  }

  .text-resizer {
    display: none;
  }

  .hero-section {
    padding: 60px 18px 40px;
    min-height: auto;
  }

  .main-title {
    font-size: 28px;
    margin-bottom: 24px;
  }

  .sapo-container {
    padding: 18px 20px;
  }

  .sapo-paragraph {
    font-size: 18px;
  }

  .article-body {
    padding: 40px 16px;
  }

  .media-figure {
    width: auto !important;
    margin-left: -16px !important;
    margin-right: -16px !important;
    border-radius: 0 !important;
  }

  .photo-caption {
    padding: 14px 16px;
  }

  .infographic-container {
    width: auto !important;
    margin-left: -16px !important;
    margin-right: -16px !important;
    padding: 24px 14px !important;
    border-radius: 12px !important;
    border-left: none !important;
    border-right: none !important;
  }

  /* Infographic 1 trên mobile */
  .chain-metrics-ribbon {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .chain-metric-pod {
    padding: 12px 14px;
    gap: 12px;
  }

  .pod-num {
    font-size: 28px !important;
  }

  .chain-matrix-board {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .matrix-pillar {
    padding: 18px 14px;
  }

  .pillar-title {
    font-size: 20px !important;
  }

  .pillar-icon {
    font-size: 32px !important;
  }

  /* Infographic 2 trên mobile */
  .stat-pill {
    flex: 1 1 100%;
  }

  .pyramid-level {
    padding: 18px 14px;
  }

  /* Infographic 3 trên mobile */
  .target-grid {
    grid-template-columns: 1fr;
  }

  .target-num {
    font-size: 36px !important;
  }

  .shift-col {
    padding: 18px 14px;
  }

  /* Thanh mục lục trên mobile */
  .quick-subnav {
    display: flex;
  }

  .quick-subnav.expanded-mobile {
    white-space: normal;
  }

  .quick-subnav.expanded-mobile .subnav-container {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px;
    gap: 8px;
  }

  .quick-subnav.expanded-mobile .subnav-item {
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--bg-primary);
    width: 100%;
  }

  .editorial-box {
    padding: 24px 20px;
  }
}