/* CSS Variables for design system */
:root {
  --bg-paper: #F9F6F0; /* Màu giấy kem nhã nhặn phong cách Financial Times/Nikkei */
  --bg-card: #ffffff;
  --bg-dark: #121A16; /* Đen than ngả xanh lá đậm */
  --color-primary: #1B4332; /* Xanh lá đậm */
  --color-secondary: #40916C; /* Xanh olive */
  --color-gold: #C9A227; /* Vàng đồng làm màu nhấn */
  --color-gold-dark: #A68018;
  --color-text-main: #1A1A1A; /* Đen than */
  --color-text-muted: #4A4A4A;
  --color-text-light: #E5E5E5;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width-content: 760px; /* Độ rộng tối ưu để đọc báo chí */
  --max-width-wide: 1140px; /* Chiều ngang mở rộng cho infographic */
  --transition-smooth: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-paper);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: 21px; /* Tăng kích thước chữ lên tối thiểu 21px theo yêu cầu */
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
}

/* Typography styling */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

h1 {
  font-size: 2.6rem;
}

h2 {
  font-size: 1.8rem;
}

h3 {
  font-size: 1.3rem;
}

p {
  margin-bottom: 1.5rem;
  color: var(--color-text-main);
  text-align: justify;
}

/* Layout classes */
.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.container-extra-wide {
  max-width: 1400px; /* Chiều ngang mở rộng tối đa cho infographic chữ lớn */
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.section-padding {
  padding: 6rem 0;
}

/* Intro Section (Bắt đầu trang web sau khi xóa Hero/Title) */
.intro-section {
  position: relative;
  background-color: var(--bg-paper);
  background-image: radial-gradient(var(--color-secondary) 1px, transparent 1px);
  background-size: 40px 40px;
  background-color: #faf6f0;
  opacity: 0.98;
  padding-top: 8rem; /* Tăng padding-top để tạo khoảng trống thoáng đãng ở đầu trang */
}

.intro-pattern-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(rgba(46, 125, 50, 0.05) 2px, transparent 2px);
  background-size: 32px 32px;
  pointer-events: none;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 992px) {
  .intro-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.intro-left p:first-of-type::first-letter {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 900;
  float: left;
  line-height: 0.8;
  margin-right: 0.75rem;
  margin-top: 0.2rem;
  color: var(--color-primary);
}

.intro-right-quote {
  background-color: var(--bg-card);
  border-left: 5px solid var(--color-gold);
  padding: 2.5rem;
  box-shadow: 0 15px 35px rgba(27, 67, 50, 0.06);
  border-radius: 0 8px 8px 0;
}

.intro-right-quote blockquote {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-primary);
  line-height: 1.6;
}

/* Viewport Full-width Image Box (Tràn viền toàn màn hình, căn giữa, không có hiệu ứng/parallax/shadow) */
.viewport-image-box {
  width: 100vw;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  height: auto; /* Tự động theo chiều cao của ảnh */
  margin: 5rem 0;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.viewport-image-box img {
  width: 100%;
  height: auto; /* Hiện 100% kích thước ảnh theo tỷ lệ gốc */
  display: block;
}

@media (max-width: 992px) {
  .viewport-image-box {
    height: auto;
    margin: 4rem 0;
  }
}

/* Sections Structure */
.section-title-wrapper {
  position: relative;
  margin-bottom: 4rem;
  text-align: center;
}

.section-number {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-gold);
  letter-spacing: 0.3rem;
  text-transform: uppercase;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  color: var(--color-primary);
  text-transform: uppercase;
  max-width: 850px;
  margin: 0 auto;
}

/* Section 1 timeline title styling */
.timeline-title-wrapper {
  position: relative;
  padding: 2rem 0;
  margin-bottom: 4rem;
  text-align: center;
}

.timeline-title-line {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold) 20%, var(--color-gold) 80%, transparent);
  z-index: 1;
}

.timeline-title-content {
  position: relative;
  display: inline-block;
  background-color: var(--bg-paper);
  padding: 0 2rem;
  z-index: 2;
}

/* Visual Box */
.visual-box {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0,0,0,0.06);
  margin: 4rem auto;
  background-color: #e2e8f0;
  position: relative;
}

.visual-box svg {
  display: block;
  width: 100%;
  height: auto;
}

.visual-caption {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 1rem;
  font-style: italic;
}

/* Infographic Wrapper */
.infographic-wrapper {
  background-color: var(--bg-card);
  border: 1px solid rgba(27, 67, 50, 0.08);
  border-radius: 16px;
  padding: 4rem 3rem;
  margin: 5rem auto;
  box-shadow: 0 30px 60px rgba(27, 67, 50, 0.04);
  width: 100%;
}

.infographic-title {
  text-align: center;
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 4rem;
  position: relative;
}

.infographic-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--color-gold);
}

/* Infographic 1: Timeline */
.timeline-infographic {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 3.5rem;
}

.timeline-infographic::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-secondary) 0%, var(--color-gold) 100%);
}

.timeline-node {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-node:last-child {
  margin-bottom: 0;
}

.timeline-icon-box {
  position: absolute;
  left: -53px;
  top: 0;
  width: 40px;
  height: 40px;
  background-color: var(--bg-card);
  border: 2px solid var(--color-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  z-index: 3;
  transition: var(--transition-smooth);
}

.timeline-node:hover .timeline-icon-box {
  background-color: var(--color-gold);
  color: var(--bg-card);
  transform: scale(1.2);
  box-shadow: 0 0 15px rgba(201, 162, 39, 0.4);
}

.timeline-year {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.timeline-content-txt {
  font-size: 0.9rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.highlight-box-info {
  background-color: rgba(201, 162, 39, 0.06);
  border-left: 5px solid var(--color-gold);
  padding: 2rem;
  margin-top: 4rem;
  border-radius: 0 12px 12px 0;
  text-align: center;
}

.highlight-box-info p {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0;
  text-align: center;
}

/* Quote Cards styling */
.quote-card {
  position: relative;
  width: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  overflow: hidden;
  margin: 6rem 0;
  box-shadow: 0 30px 70px rgba(0,0,0,0.12);
}

.quote-card-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.quote-card-bg svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  filter: grayscale(100%);
}

.quote-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(27,67,50,0.95) 0%, rgba(18,26,22,0.98) 100%);
  z-index: 2;
}

.quote-card-content {
  position: relative;
  z-index: 3;
  padding: 4rem;
  text-align: center;
  max-width: 900px;
}

.quote-card-content blockquote {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  line-height: 1.6;
  color: #FFFFFF;
  margin-bottom: 2.5rem;
  font-style: italic;
}

.quote-card-author {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  font-weight: 700;
}

/* Floating Card Animation */
.floating-cards-container {
  margin: 5rem 0;
}

.floating-card-visual {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(27, 67, 50, 0.08);
  animation: floatEffect 6s ease-in-out infinite alternate;
}

/* Infographic 2: Circle radial layers diagram */
.circle-infographic-container {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr; /* Dành nhiều chỗ hơn cho biểu đồ SVG tròn */
  align-items: center;
  justify-content: center;
  gap: 4rem;
}

@media (max-width: 992px) {
  .circle-infographic-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.circle-svg-wrapper {
  position: relative;
  width: 100%;
  max-width: 800px; /* Tăng max-width để biểu đồ to rõ hơn */
  margin: 0 auto;
  aspect-ratio: 1300 / 950; /* Tỷ lệ chuẩn theo viewBox 1300x950 mới */
}

.circle-svg-wrapper svg {
  width: 100%;
  height: 100%;
}

.circle-node {
  cursor: pointer;
  transition: var(--transition-smooth);
}

.circle-node:hover {
  filter: drop-shadow(0 0 12px var(--color-gold));
}

/* Biểu đồ text to rõ 21px */
.svg-text-large {
  font-family: var(--font-sans);
  font-size: 42px !important; /* Gấp đôi cỡ chữ ban đầu (21px -> 42px) */
  font-weight: 700;
  fill: var(--color-primary);
  letter-spacing: -0.01em;
  pointer-events: none;
}

.svg-text-large-center {
  font-family: var(--font-sans);
  font-size: 42px !important; /* Gấp đôi cỡ chữ ban đầu */
  font-weight: 800;
  fill: var(--color-gold);
  pointer-events: none;
  text-anchor: middle; /* Căn giữa chiều ngang */
}

.svg-text-large-center-sub {
  font-family: var(--font-sans);
  font-size: 42px !important; /* Gấp đôi cỡ chữ ban đầu */
  font-weight: 800;
  fill: #FFFFFF;
  pointer-events: none;
  text-anchor: middle; /* Căn giữa chiều ngang */
}

/* Thiết kế lại kiểu chữ dễ nhìn hơn cho nội dung hiện ra khi di chuột */
.circle-info-display {
  width: 100%;
  min-height: 280px;
  background-color: var(--bg-card);
  border-radius: 12px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  border: 2px solid rgba(201, 162, 39, 0.25);
  font-family: var(--font-sans);
  font-style: normal;
  color: var(--color-text-main);
  font-size: 21px;
  line-height: 1.8;
  box-shadow: 0 15px 35px rgba(27,67,50,0.03);
  transition: var(--transition-smooth);
}

.circle-info-display strong {
  font-family: var(--font-serif);
  color: var(--color-gold);
  font-size: 26px;
  font-weight: 700;
  display: block;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.circle-process-flow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin: 4rem auto 0;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-top: 1px solid rgba(27,67,50,0.08);
  padding-top: 3rem;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  width: 120px;
  text-align: center;
}

.process-step-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-paper);
  border: 2px solid var(--color-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  font-size: 1.2rem;
  transition: var(--transition-smooth);
}

.process-step:hover .process-step-icon {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: white;
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(201,162,39,0.3);
}

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

@media (max-width: 768px) {
  .circle-process-flow {
    justify-content: center;
    gap: 1.5rem;
  }
  .process-arrow {
    display: none;
  }
}

/* Quote 2 Map background styling */
.quote-map-section {
  position: relative;
  background-color: var(--bg-dark);
  color: #ffffff;
  padding: 8rem 0;
  overflow: hidden;
}

.quote-map-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  z-index: 1;
  pointer-events: none;
}

.quote-map-bg svg {
  width: 100%;
  height: 100%;
  opacity: 0.1;
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 1;
}

.quote-map-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.quote-map-content blockquote {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  font-style: italic;
  color: #F9F6F0;
}

.quote-map-content .author {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-gold);
  letter-spacing: 0.2em;
}

/* Section 3 styles (Gradient Green Background) */
.section-green-grad {
  background: linear-gradient(135deg, #1B4332 0%, #081C15 100%);
  color: #E5E5E5;
}

.section-green-grad h1, 
.section-green-grad h2, 
.section-green-grad h3, 
.section-green-grad h4,
.section-green-grad .section-title {
  color: #FFFFFF;
}

.section-green-grad p {
  color: #C8D3CE;
}

/* Ecosystem Central Infographic */
.ecosystem-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 4rem 0;
}

.ecosystem-wrapper {
  width: 100%;
  max-width: 750px;
}

.ecosystem-wrapper svg {
  width: 100%;
  height: auto;
}

/* Tăng cỡ chữ trong biểu đồ Hệ sinh thái lên 21px */
.ecosystem-text-large {
  font-family: var(--font-sans);
  font-size: 21px !important;
  font-weight: 700;
  fill: #FFFFFF;
  pointer-events: none;
}

.ecosystem-text-large-center {
  font-family: var(--font-serif);
  font-size: 25px !important;
  font-weight: 900;
  fill: #1B4332;
  pointer-events: none;
}

.ecosystem-text-sub {
  font-family: var(--font-sans);
  font-size: 21px !important;
  font-weight: 600;
  fill: #FFFFFF;
  pointer-events: none;
}

/* Dashboard Mini */
.dashboard-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  text-transform: uppercase;
  color: var(--color-gold);
  text-align: center;
  letter-spacing: 0.1em;
  margin: 5rem 0 2.5rem;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}

@media (max-width: 992px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid rgba(27, 67, 50, 0.08);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 15px 35px rgba(0,0,0,0.02);
  transition: var(--transition-smooth);
}

.stat-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-gold);
  box-shadow: 0 20px 40px rgba(201, 162, 39, 0.08);
}

.stat-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1.25rem;
  fill: var(--color-gold);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.dashboard-regions {
  background-color: var(--bg-card);
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: 0 15px 35px rgba(0,0,0,0.02);
  border: 1px solid rgba(27, 67, 50, 0.08);
}

.regions-title {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-gold);
  padding-bottom: 0.5rem;
  display: inline-block;
}

.regions-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
}

.region-tag {
  background-color: var(--bg-paper);
  border: 1px solid rgba(27, 67, 50, 0.15);
  padding: 0.6rem 1.2rem;
  border-radius: 30px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition-smooth);
}

.region-tag:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* Conclusion Section (Ending) */
.conclusion-section {
  position: relative;
  width: 100%;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--bg-dark);
}

.conclusion-visual {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.conclusion-visual svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.conclusion-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(18, 26, 22, 1) 0%, rgba(18, 26, 22, 0.7) 100%);
  z-index: 2;
}

.conclusion-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 1000px;
  padding: 4rem 1.5rem;
}

.conclusion-text {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  line-height: 1.6;
  color: #FFFFFF;
  font-weight: 700;
  text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

@media (max-width: 768px) {
  .conclusion-text {
    font-size: 1.4rem;
  }
}

/* Footer Section */
.footer-section {
  background-color: #121A16;
  color: var(--color-text-light);
  padding: 6rem 0 4rem;
  border-top: 1px solid rgba(201, 162, 39, 0.2);
  text-align: center;
  position: relative;
}

.footer-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-logo {
  width: 48px;
  height: 48px;
  margin-bottom: 2.5rem;
  fill: var(--color-gold);
}

.footer-meta {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: #A3B899;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 4rem;
}

.footer-meta span {
  position: relative;
}

.footer-line-animation {
  width: 150px;
  height: 2px;
  background-color: var(--color-gold);
  position: relative;
  overflow: hidden;
  margin-top: 2rem;
  border-radius: 1px;
}

.footer-line-animation::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, #FFFFFF, transparent);
  animation: shimmer 3s infinite linear;
}

@keyframes shimmer {
  100% { left: 100%; }
}

.footer-credits {
  font-size: 0.7rem;
  color: #6C7A6B;
  margin-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  width: 100%;
}

/* Scrollytelling & animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.25, 1, 0.5, 1), transform 1s cubic-bezier(0.25, 1, 0.5, 1);
}

.reveal-on-scroll.active {
  opacity: 1;
  transform: translateY(0);
}