@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

/* --- DESIGN SYSTEM & VARIABLE SYSTEM --- */
:root {
  --color-green-dark: #1b4332;
  --color-green-mid: #2d6a4f;
  --color-green-light: #52b788;
  --color-green-pale: #d8f3dc;
  
  --color-blue-tech: #0077b6;
  --color-blue-light: #caf0f8;
  
  --color-yellow-accent: #ffb703;
  --color-yellow-light: #fefae0;
  
  --color-bg-light: #f4f6f4;
  --color-bg-white: #ffffff;
  --color-text-dark: #111111;
  --color-text-muted: #4a5568;
  --color-border: #e2e8f0;
  
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.25s ease;
}

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

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

body {
  overflow-x: hidden;
  line-height: 1.8;
}

/* --- VERTICAL PROGRESS BAR --- */
#progress-bar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: rgba(0, 0, 0, 0.05);
  z-index: 1000;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-green-mid), var(--color-blue-tech));
  transition: width 0.1s ease-out;
}



/* --- HERO BANNER --- */
#hero {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: #000;
}

#hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('images/hero_banner.png');
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  will-change: transform;
}

#hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.5));
}

#hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0.8;
  animation: bounce 2s infinite;
  cursor: pointer;
}

#hero-scroll-indicator span {
  width: 1px;
  height: 40px;
  background: white;
}

/* --- MAIN ARTICLE CONTENT --- */
#main-article {
  max-width: 100vw;
  background: var(--color-bg-light);
}

/* --- TITLE & SAPO BLOCK --- */
.article-header {
  max-width: 900px;
  margin: -10vh auto 0 auto;
  position: relative;
  z-index: 10;
  background: var(--color-bg-white);
  padding: 80px;
  border-radius: 8px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--color-border);
}

.title-main {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-green-dark);
  margin-bottom: 24px;
}

.subtitle {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-blue-tech);
  font-weight: 600;
  margin-bottom: 30px;
  display: inline-block;
  border-bottom: 2px solid var(--color-yellow-accent);
  padding-bottom: 6px;
}

.sapo {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--color-text-dark);
  border-left: 4px solid var(--color-green-mid);
  padding-left: 24px;
  margin-bottom: 40px;
}

/* --- SECTION STRUCTURE --- */
.section-magazine {
  padding: 100px 0;
  position: relative;
}

.section-magazine:nth-child(even) {
  background-color: var(--color-bg-white);
}

.container-editorial {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}

/* --- SECTION HEADER --- */
.section-header-sticky {
  position: relative;
  z-index: 100;
  pointer-events: none;
}

.section-label {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-green-dark);
  background: transparent;
  padding: 12px 0;
  border-left: 6px solid var(--color-green-mid);
  padding-left: 20px;
  margin-bottom: 40px;
  pointer-events: auto;
}

/* --- EDITORIAL PARAGRAPHS --- */
.editorial-text {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  color: var(--color-text-dark);
  line-height: 1.9;
  margin-bottom: 30px;
  text-align: justify;
}

.editorial-text.dropcap::first-letter {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  float: left;
  line-height: 1;
  font-weight: bold;
  padding-right: 12px;
  color: var(--color-green-dark);
}

/* --- PART 2 TWO-COLUMN LAYOUT --- */
.grid-magazine-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 50px;
  align-items: start;
}

/* --- PULL QUOTE --- */
.pull-quote {
  position: relative;
  background: var(--color-yellow-light);
  border-left: 5px solid var(--color-yellow-accent);
  padding: 40px;
  border-radius: 0 8px 8px 0;
  margin: 50px 0;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.02);
}

.pull-quote-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-style: italic;
  font-weight: 600;
  color: var(--color-green-dark);
  line-height: 1.6;
  margin-bottom: 15px;
}

.pull-quote-author {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* --- IMAGE CONTAINERS --- */
.magazine-image-wrap {
  width: 100%;
  margin: 60px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.06);
}

.magazine-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: center;
}

.magazine-image-wrap:hover img {
  transform: scale(1.03);
}

/* --- INFOGRAPHIC CONTAINER --- */
.infographic-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 40px;
  margin: 60px 0;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: visible;
}

.infographic-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-green-dark);
  margin-bottom: 10px;
  text-align: center;
}

.infographic-subtitle {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  text-align: center;
  letter-spacing: 0.5px;
}

/* --- SVG GRAPHICS STYLING & ANIMATIONS --- */
.svg-graphic {
  width: 100%;
  height: auto;
  max-height: 550px;
  display: block;
  margin: 0 auto;
}

/* Infographic 1.1: Mechanization Flow */
.iso-node {
  cursor: pointer;
  transition: var(--transition-fast);
  transform-box: fill-box;
  transform-origin: center;
}

.iso-node:hover {
  transform: translateY(-8px);
}

.iso-glow-path {
  stroke-dasharray: 12, 12;
  animation: strokeFlow 30s linear infinite;
}

@keyframes strokeFlow {
  to {
    stroke-dashoffset: -1000;
  }
}

/* Infographic 1.2: Tây Ninh data charts */
.chart-radial-track {
  stroke: var(--color-border);
}

.chart-radial-fill {
  transition: stroke-dashoffset 2s ease-out;
}

.chart-bar-rect {
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.animated-num {
  font-family: var(--font-sans);
  font-weight: 700;
  fill: var(--color-green-dark);
}

/* Infographic 2.1: Value Chain */
.chain-node {
  cursor: pointer;
}

.chain-node circle {
  transition: var(--transition-fast);
}

.chain-node:hover circle {
  fill: var(--color-yellow-accent) !important;
  stroke: var(--color-green-dark) !important;
  r: 32 !important;
}

.chain-flow-line {
  stroke-dasharray: 10, 15;
  animation: flowLine 25s linear infinite;
}

@keyframes flowLine {
  to {
    stroke-dashoffset: -500;
  }
}

/* Infographic 2.2: Traceability Network */
.trace-glow {
  filter: drop-shadow(0px 0px 8px rgba(0, 119, 182, 0.6));
}

.trace-line {
  stroke-dasharray: 8, 8;
  animation: tracePulse 15s linear infinite;
}

@keyframes tracePulse {
  to {
    stroke-dashoffset: -300;
  }
}

/* Infographic 3.1: Digital Ecosystem Hub */
.hub-spoke-line {
  stroke-dasharray: 5, 5;
  animation: pulseLine 2s ease-in-out infinite alternate;
}

@keyframes pulseLine {
  from {
    stroke-dashoffset: 0;
    opacity: 0.4;
  }
  to {
    stroke-dashoffset: 10;
    opacity: 0.9;
  }
}

.hub-satellite {
  transform-box: fill-box;
  transform-origin: center;
}

/* --- TOOLTIP DESIGN --- */
.svg-tooltip {
  position: fixed;
  background: rgba(27, 67, 50, 0.95);
  color: white;
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.5;
  max-width: 250px;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 1000;
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
  border: 1px solid rgba(255,255,255,0.1);
}

.svg-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: rgba(27, 67, 50, 0.95) transparent transparent transparent;
}

.svg-tooltip.active {
  opacity: 1;
  visibility: visible;
}

/* --- CONCLUSION SECTION --- */
#conclusion-section {
  position: relative;
  width: 100%;
  padding: 120px 0;
  background-image: url('images/ending_banner.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: white;
  overflow: hidden;
}

#conclusion-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(17, 34, 25, 0.85); /* Dark green overlay */
  z-index: 1;
}

#conclusion-section .container-editorial {
  position: relative;
  z-index: 2;
  max-width: 800px;
  text-align: left;
}

#conclusion-section h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-yellow-accent);
  margin-bottom: 40px;
  text-align: left;
}

#conclusion-section .editorial-text {
  color: #e2e8f0;
  font-size: 1.25rem;
  line-height: 2;
  text-align: left;
}

#conclusion-section .editorial-text.dropcap::first-letter {
  color: var(--color-yellow-accent);
}



.author-info-block {
  margin: 50px auto 0 auto;
  border-top: 1px solid rgba(255,255,255,0.2);
  padding-top: 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 300px;
}

.author-signature {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--color-yellow-accent);
  display: block;
}

.author-source {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  display: block;
  margin-top: 5px;
}

/* --- SCROLL ANIMATIONS (REVEAL ON SCROLL) --- */
.reveal-block {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* --- KEYFRAME ANIMATIONS --- */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1024px) {
  .grid-magazine-2col {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .article-header {
    margin-top: -5vh;
    padding: 50px 30px;
  }
  
  .title-main {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .title-main {
    font-size: 2.2rem;
  }
  
  .sapo {
    font-size: 1.15rem;
  }
  
  .section-magazine {
    padding: 60px 0;
  }
  
  .container-editorial {
    padding: 0 20px;
  }
  
  .section-label {
    font-size: 1.8rem;
    padding: 8px 16px;
  }
  
  #mini-nav {
    display: none; /* Hide mini floating nav on small mobile */
  }
  
  .pull-quote {
    padding: 20px;
    margin: 30px 0;
  }
  
  .pull-quote-text {
    font-size: 1.25rem;
  }
  
  .infographic-card {
    padding: 20px 15px;
  }
  
  #conclusion-section {
    padding: 80px 0;
    background-attachment: scroll; /* Mobile smooth scrolling helper */
  }
}

/* --- MECHANIZATION STEPS GRID --- */
.mechanization-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
  margin-top: 40px;
  border-top: 1px solid var(--color-border);
  padding-top: 40px;
}

.step-card {
  background: var(--color-bg-light);
  padding: 24px;
  border-radius: 8px;
  border-left: 4px solid var(--color-green-mid);
  transition: var(--transition-fast);
}

.step-card:hover, .step-card.active {
  background: var(--color-green-pale);
  transform: translateY(-4px);
  border-left-color: var(--color-blue-tech);
}

.step-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-green-light);
  display: block;
  margin-bottom: 10px;
}

.step-title {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-green-dark);
  margin-bottom: 10px;
}

.step-desc {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .mechanization-steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* --- EDITORIAL INFO GRIDS --- */
.editorial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
  border-top: 1px solid var(--color-border);
  padding-top: 40px;
}

.info-card {
  background: var(--color-bg-light);
  padding: 20px;
  border-radius: 8px;
  border-left: 4px solid var(--color-green-mid);
  transition: var(--transition-fast);
}

.info-card:hover, .info-card.active {
  background: var(--color-green-pale);
  transform: translateY(-4px);
  border-left-color: var(--color-blue-tech);
}

.info-card-title {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-green-dark);
  margin-bottom: 8px;
}

.info-card-desc {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .editorial-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
}

/* --- SVG WRAPPER FOR MOBILE RESPONSIVE --- */
.svg-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 20px;
  margin-bottom: 20px;
}

.svg-wrapper::-webkit-scrollbar {
  height: 6px;
}

.svg-wrapper::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 3px;
}

.svg-wrapper::-webkit-scrollbar-thumb {
  background: var(--color-green-light);
  border-radius: 3px;
}

@media (max-width: 768px) {
  .svg-graphic {
    min-width: 800px;
    width: 100%;
    height: auto;
  }
}