/* ==========================================================================
   LONGFORM ECONOMIC JOURNALISM DESIGN SYSTEM
   Bloomberg - Nikkei Asia - VnExpress Premium Hybrid Style
   ========================================================================== */

:root {
  --primary-green: #1B8F4D;
  --primary-green-light: #E8F5E9;
  --primary-green-dark: #126335;
  --terracotta: #D97A2B;
  --terracotta-light: #FDF3E7;
  --soft-yellow: #F5C86A;
  --soft-yellow-light: #FEF9ED;
  
  --bg-main: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-secondary: #F1F5F9;
  
  --text-title: #0F172A;
  --text-body: #27272A;
  --text-muted: #64748B;
  
  --border-light: #E2E8F0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 40px rgba(27, 143, 77, 0.08);
  
  --font-serif: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Inter', system-ui, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* Dark Mode Support */
[data-theme="dark"] {
  --bg-main: #0B0F17;
  --bg-card: #151D2A;
  --bg-secondary: #1E293B;
  --text-title: #F8FAFC;
  --text-body: #E2E8F0;
  --text-muted: #94A3B8;
  --border-light: #334155;
  --primary-green-light: #064E2E;
  --terracotta-light: #4A2206;
  --soft-yellow-light: #3D2D05;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

html, body {
  overflow-x: hidden;
  width: 100%;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
}

body {
  background-color: var(--bg-main);
  color: var(--text-body);
  font-family: var(--font-serif);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Sticky Progress Bar */
#reading-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(226, 232, 240, 0.4);
  z-index: 1000;
}

#reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary-green) 0%, var(--terracotta) 100%);
  transition: width 0.1s linear;
}

/* Typography Title Header (No Image Banner, No Nav, No Chips) */
.title-header-wrapper {
  max-width: 900px;
  margin: 60px auto 40px;
  padding: 0 24px;
  text-align: center;
  position: relative;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-green);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  background: var(--primary-green-light);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
}

/* Main Typography Title */
.main-title-box {
  margin: 20px 0 30px;
}

.title-line-1 {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-title);
  letter-spacing: -1.5px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.title-line-2 {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5.5vw, 4.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--terracotta) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 16px 0;
  margin-top: 30px;
}

.meta-author {
  font-weight: 700;
  color: var(--text-title);
}

/* Main Container Architecture (Supports Wide Infographics without side overflow) */
.main-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 80px;
  width: 100%;
}

.article-content-block {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Sapo Box */
.sapo-box {
  background: linear-gradient(135deg, var(--primary-green-light) 0%, var(--soft-yellow-light) 100%);
  border-left: 5px solid var(--primary-green);
  border-radius: var(--radius-md);
  padding: 32px 36px;
  margin: 40px auto 50px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.sapo-text {
  font-size: 1.22rem;
  font-weight: 500;
  line-height: 1.8;
  color: var(--text-title);
}

.sapo-text p + p {
  margin-top: 16px;
}

/* Section Styling */
.article-section {
  margin-bottom: 70px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.3;
  margin: 50px 0 24px;
  position: relative;
  padding-bottom: 14px;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-green), var(--terracotta));
  border-radius: 2px;
}

/* Paragraphs */
p {
  margin-bottom: 24px;
  font-size: 1.08rem;
  color: var(--text-body);
}

p:first-of-type::first-letter {
  font-size: 3.4em;
  float: left;
  line-height: 0.8;
  padding-top: 4px;
  padding-right: 12px;
  padding-bottom: 2px;
  font-weight: 800;
  color: var(--primary-green);
  font-family: var(--font-serif);
}

/* Editorial Photo Container */
.editorial-photo-card {
  margin: 45px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
}

.editorial-photo {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.editorial-photo-card:hover .editorial-photo {
  transform: scale(1.02);
}

.photo-caption {
  padding: 14px 20px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.photo-caption::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--terracotta);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==========================================================================
   INFOGRAPHICS DESIGN SYSTEM (Wide 1240px Container, Min Font Size >= 18px)
   ========================================================================== */

.infographic-wrapper {
  width: 100%;
  max-width: 1240px;
  margin: 60px auto;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .infographic-wrapper {
    padding: 28px 16px;
  }
}

.infographic-header {
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

.infographic-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--terracotta);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.infographic-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.5vw, 2.2rem); /* ≥ 18px */
  font-weight: 800;
  color: var(--text-title);
}

/* Infographic 1: Horizontal Process Line */
.info1-process-container {
  display: flex;
  flex-direction: column;
  gap: 35px;
}

.process-steps-scroll {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 14px;
  position: relative;
}

@media (max-width: 1024px) {
  .process-steps-scroll {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
}

@media (max-width: 600px) {
  .process-steps-scroll {
    grid-template-columns: repeat(2, 1fr);
  }
}

.step-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 20px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.step-card:hover {
  background: var(--primary-green-light);
  border-color: var(--primary-green);
  transform: translateY(-5px);
  box-shadow: var(--shadow-sm);
}

.step-num {
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 900;
  color: var(--primary-green);
}

.step-icon {
  width: 36px;
  height: 36px;
  fill: var(--primary-green);
}

.step-label {
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
}

.info1-platforms {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-top: 10px;
}

.platform-tag {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 700;
  color: var(--text-title);
}

/* Infographic 1 Highlight Boxes */
.info1-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 20px;
}

@media (max-width: 860px) {
  .info1-highlights {
    grid-template-columns: 1fr;
  }
}

.highlight-card {
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.highlight-card.van-di {
  background: linear-gradient(135deg, var(--primary-green-light) 0%, rgba(27, 143, 77, 0.05) 100%);
  border-left: 6px solid var(--primary-green);
}

.highlight-card.coop-195 {
  background: linear-gradient(135deg, var(--terracotta-light) 0%, rgba(217, 122, 43, 0.05) 100%);
  border-left: 6px solid var(--terracotta);
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.4rem; /* ≥ 18px */
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-stat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-stat-item {
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 12px;
}

.stat-bold {
  font-weight: 800;
  color: var(--primary-green);
  font-size: 1.3rem; /* ≥ 18px */
}

/* Infographic 2: 6 Blocks + Center Triangle */
.info2-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 45px;
}

@media (max-width: 1024px) {
  .info2-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (max-width: 600px) {
  .info2-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.info2-block {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 22px 14px;
  text-align: center;
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease;
}

.info2-block:hover {
  transform: translateY(-5px);
  border-color: var(--terracotta);
  background: var(--terracotta-light);
}

.info2-icon-wrapper {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  background: var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.info2-label {
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.35;
}

/* Center Triangle Structure for Infographic 2 */
.triangle-wrapper {
  background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  border-radius: var(--radius-md);
  padding: 45px 24px;
  text-align: center;
  position: relative;
  border: 1px solid var(--border-light);
}

.triangle-graphic {
  max-width: 750px;
  margin: 0 auto;
  position: relative;
}

.triangle-svg-container {
  width: 100%;
  height: auto;
  overflow: visible;
}

/* Infographic 3: Tam giác phát triển lớn */
.info3-triangle-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 30px;
}

@media (max-width: 860px) {
  .info3-triangle-container {
    grid-template-columns: 1fr;
  }
}

.vertex-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 26px;
  border: 2px solid var(--primary-green);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.vertex-card:nth-child(2) {
  border-color: var(--terracotta);
}

.vertex-card:nth-child(3) {
  border-color: var(--soft-yellow);
}

.vertex-title {
  font-family: var(--font-serif);
  font-size: 1.35rem; /* ≥ 18px */
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 14px;
}

.vertex-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.v-tag {
  background: var(--bg-secondary);
  padding: 8px 14px;
  border-radius: 20px;
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 600;
  color: var(--text-body);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.info3-center-banner {
  background: linear-gradient(135deg, var(--primary-green) 0%, var(--terracotta) 100%);
  color: #FFFFFF;
  padding: 22px;
  border-radius: var(--radius-md);
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.55rem; /* ≥ 18px */
  font-weight: 900;
  letter-spacing: 1px;
  margin: 35px 0;
  box-shadow: var(--shadow-md);
}

.info3-icons-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 35px;
}

.info3-chip {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  padding: 10px 18px;
  border-radius: 30px;
  font-family: var(--font-sans);
  font-size: 1.15rem; /* ≥ 18px */
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-title);
}

.info3-pipeline {
  background: var(--primary-green-light);
  border: 1px solid var(--primary-green);
  padding: 22px 20px;
  border-radius: var(--radius-md);
  text-align: center;
  font-family: var(--font-sans);
  font-size: 1.2rem; /* ≥ 18px */
  font-weight: 800;
  color: var(--primary-green-dark);
  line-height: 1.6;
}

/* Conclusion Block */
.conclusion-wrapper {
  background: linear-gradient(135deg, #E8F5E9 0%, #F4FBF7 100%);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  margin: 70px auto 50px;
  border: 1px solid rgba(27, 143, 77, 0.2);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .conclusion-wrapper {
  background: linear-gradient(135deg, #063A22 0%, #0F261C 100%);
}

.editorial-quote {
  position: relative;
  padding-left: 30px;
  border-left: 5px solid var(--primary-green);
  margin-bottom: 40px;
}

.editorial-quote blockquote {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.8;
  color: var(--text-title);
  font-style: italic;
}

.author-footer-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  border-top: 1px solid rgba(27, 143, 77, 0.2);
  padding-top: 25px;
}

/* Simple Centered Author Name Above Footer */
.article-author-simple {
  text-align: center;
  margin: 40px auto 30px;
  padding: 0 16px;
}

.simple-author-name {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: 0.5px;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar-placeholder {
  width: 48px;
  height: 48px;
  background: var(--primary-green);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.2rem;
}

.author-name-title {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-title);
}

.author-role {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-icon-cluster {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cluster-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-card);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

/* Guaranteed Visibility for Scroll Animations */
.fade-in-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Footer Page Ending */
.page-footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border-light);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Print/Mobile Adjustments */
@media (max-width: 640px) {
  html {
    font-size: 15px;
  }
  .title-header-wrapper {
    padding: 0 16px;
  }
  .main-container {
    padding: 0 16px 40px;
  }
  .sapo-box {
    padding: 24px;
  }
  .infographic-wrapper {
    padding: 24px 16px;
  }
  .conclusion-wrapper {
    padding: 30px 20px;
  }
}