/* Import Google Fonts */
@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;1,400&family=Outfit:wght@300;400;500;600;700&display=swap');

/* CSS Variables */
:root {
  --color-forest: #1F6B45;
  --color-emerald: #2E8B57;
  --color-coffee: #6F4E37;
  --color-gold: #C89B3C;
  --color-gold-light: rgba(200, 155, 60, 0.15);
  --color-white: #FFFFFF;
  --color-light-gray: #F5F6F7;
  --color-text-dark: #1A201C;
  --color-text-muted: #4A554F;
  --color-glass-bg: rgba(255, 255, 255, 0.85);
  --color-glass-border: rgba(200, 155, 60, 0.2);
  
  --font-title: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  
  --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--color-white);
  color: var(--color-text-dark);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

body {
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-light-gray);
}
::-webkit-scrollbar-thumb {
  background: var(--color-forest);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-gold);
}

/* Top Progress Bar */
#progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: rgba(245, 246, 247, 0.5);
  z-index: 1000;
}

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

/* Layout Containers */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.text-container {
  max-width: 840px;
  margin: 0 auto;
}

/* Article Images styling */
.image-wrapper {
  margin: 65px auto;
  width: 100%;
  position: relative;
}

.article-image {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
  display: block;
  transition: var(--transition-smooth);
}

.article-image:hover {
  transform: scale(1.008);
  box-shadow: 0 25px 50px rgba(31, 107, 69, 0.12);
}

.image-caption {
  display: block;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 15px;
  font-style: italic;
  line-height: 1.5;
}

@media (min-width: 1024px) {
  .image-wrapper {
    width: calc(100% + 120px);
    margin-left: -60px;
  }
}


/* Decorative background elements */
.bg-decor {
  position: absolute;
  pointer-events: none;
  z-index: -1;
  opacity: 0.04;
}

/* Title Section */
.hero-section {
  padding: 120px 0 80px 0;
  position: relative;
  overflow: hidden;
}

.hero-center-container {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.hero-content-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.category-tag {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--color-gold);
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
  padding-left: 20px;
  padding-right: 20px;
}

.category-tag::before, .category-tag::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 2px;
  background-color: var(--color-gold);
}

.category-tag::before {
  left: -5px;
}

.category-tag::after {
  right: -5px;
}

.main-title {
  font-family: var(--font-title);
  font-size: clamp(48px, 5vw, 76px);
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-forest);
  margin-bottom: 35px;
  letter-spacing: -0.02em;
  position: relative;
  text-align: center;
}/* Text Gradient Effect */
.main-title span {
  background: linear-gradient(135deg, var(--color-forest) 30%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.sapo-card {
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-glass-border);
  padding: 40px;
  border-radius: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.03);
  font-size: 24px;
  line-height: 1.7;
  font-weight: 400;
  color: var(--color-text-dark);
  font-family: var(--font-sans);
  position: relative;
  border-left: 5px solid var(--color-gold);
  text-align: justify;
  max-width: 840px;
  margin: 0 auto 50px auto;
}


/* Data Highlight Bar */
.data-highlight-bar {
  background-color: var(--color-light-gray);
  border-top: 1px solid rgba(0,0,0,0.05);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  padding: 50px 0;
  margin-bottom: 100px;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 30px;
  text-align: center;
}

.data-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px;
  transition: var(--transition-smooth);
}

.data-item:hover {
  transform: translateY(-5px);
}

.data-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 15px;
  color: var(--color-forest);
  transition: var(--transition-fast);
}

.data-item:hover .data-icon {
  color: var(--color-gold);
  transform: scale(1.1);
}

.data-number {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 700;
  color: var(--color-forest);
  line-height: 1.2;
  margin-bottom: 8px;
}

.data-label {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Article Section Structure */
.article-section {
  padding: 100px 0;
  position: relative;
}

.section-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.section-sidebar {
  position: relative;
  max-width: 840px;
  margin: 0 auto;
  width: 100%;
}

.sticky-header {
  position: relative;
  top: 0;
  z-index: 1;
}

.section-number {
  font-family: var(--font-display);
  font-size: 80px;
  font-weight: 800;
  line-height: 1;
  color: var(--color-gold-light);
  margin-bottom: 5px;
  display: block;
}

.section-title {
  font-family: var(--font-title);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-forest);
  border-bottom: 2px solid var(--color-gold-light);
  padding-bottom: 15px;
  margin-bottom: 10px;
}

.paragraph-content {
  max-width: 840px;
  margin: 0 auto;
  width: 100%;
}

/* Typography styles for paragraph content */
.paragraph-content p {
  font-size: 22px;
  line-height: 1.8;
  color: var(--color-text-dark);
  margin-bottom: 35px;
  text-align: justify;
}

/* First letter of sections */
.paragraph-content > p:first-of-type::first-letter {
  font-family: var(--font-title);
  font-size: 80px;
  line-height: 0.8;
  float: left;
  margin-right: 12px;
  margin-top: 8px;
  color: var(--color-forest);
  font-weight: 700;
}

/* Interstitial Graphics */
.interstitial-graphic {
  display: flex;
  justify-content: center;
  margin: 40px 0;
  opacity: 0.15;
  transition: var(--transition-smooth);
}

.interstitial-graphic svg {
  width: 60px;
  height: 60px;
  fill: var(--color-forest);
}

/* Pull Quotes */
.pull-quote {
  margin: 80px 0;
  padding: 60px;
  background-color: var(--color-light-gray);
  border-left: 6px solid var(--color-gold);
  border-radius: 0 24px 24px 0;
  position: relative;
}

.pull-quote::before {
  content: '“';
  position: absolute;
  top: -10px;
  left: 30px;
  font-family: var(--font-title);
  font-size: 120px;
  line-height: 1;
  color: var(--color-gold-light);
  font-weight: 700;
}

.pull-quote p {
  font-family: var(--font-title);
  font-size: 32px;
  line-height: 1.5;
  font-style: italic;
  color: var(--color-forest);
  font-weight: 600;
  margin-bottom: 0;
  position: relative;
  z-index: 2;
}

/* Infographics General styling */
.infographic-wrapper {
  margin: 90px auto;
  background: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 32px;
  padding: 60px 40px;
  box-shadow: 0 30px 60px rgba(31, 107, 69, 0.05);
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 1000px;
}

@media (min-width: 1200px) {
  .infographic-wrapper {
    width: calc(100% + 240px);
    margin-left: -120px;
    max-width: 1200px;
  }
}


.infographic-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-forest);
  margin-bottom: 45px;
  text-align: center;
  letter-spacing: -0.01em;
}

/* Infographic 1: Timeline */
.timeline-container {
  position: relative;
  width: 100%;
  padding: 20px 0;
  overflow-x: auto;
}

.timeline-svg-bg {
  position: absolute;
  top: 42px;
  left: 0;
  width: 100%;
  height: 20px;
  z-index: 1;
  pointer-events: none;
}

.timeline-line-path {
  fill: none;
  stroke: rgba(46, 139, 87, 0.2);
  stroke-width: 4;
}

.timeline-line-active {
  fill: none;
  stroke: var(--color-emerald);
  stroke-width: 4;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(160px, 1fr));
  gap: 20px;
  position: relative;
  z-index: 2;
}

.timeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.timeline-point {
  width: 64px;
  height: 64px;
  background-color: var(--color-forest);
  border: 4px solid var(--color-gold);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 25px;
  color: var(--color-white);
  position: relative;
  z-index: 3;
  box-shadow: 0 8px 20px rgba(31, 107, 69, 0.2);
}

.timeline-point svg {
  width: 28px;
  height: 28px;
}

.timeline-content {
  opacity: 1;
  transform: translateY(0);
  padding: 0 10px;
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-forest);
  line-height: 1.3;
}

/* Infographic 2: IoT Dashboard */
.dashboard-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

.dashboard-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 440px;
  margin: 0 auto;
}

.dashboard-svg {
  width: 100%;
  height: 100%;
}

.pulse-node {
  animation: pulseNode 3s infinite ease-in-out;
}

.pulse-node:nth-child(2n) {
  animation-delay: 1s;
}

.pulse-node:nth-child(3n) {
  animation-delay: 1.5s;
}

@keyframes pulseNode {
  0% { r: 6px; opacity: 0.4; }
  50% { r: 10px; opacity: 1; }
  100% { r: 6px; opacity: 0.4; }
}

.pulse-circle {
  animation: ripple 3s infinite ease-out;
  transform-origin: center;
}

@keyframes ripple {
  0% { transform: scale(0.95); opacity: 1; }
  100% { transform: scale(1.2); opacity: 0; }
}

.node-label {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  fill: var(--color-text-dark);
  pointer-events: none;
  transition: fill var(--transition-fast);
}

.pulse-node-group:hover .node-label {
  fill: var(--color-gold);
}

.dashboard-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
}

.info-card {
  background: var(--color-light-gray);
  border: 1px solid rgba(0,0,0,0.03);
  padding: 22px;
  border-radius: 16px;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.info-card:hover {
  background: var(--color-white);
  border-color: var(--color-gold);
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.05);
}

.info-card-icon {
  width: 44px;
  height: 44px;
  color: var(--color-forest);
  margin-bottom: 20px;
  transition: var(--transition-fast);
}

.info-card:hover .info-card-icon {
  color: var(--color-gold);
}

.info-card-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-dark);
  margin-bottom: 10px;
}

.info-card-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* Infographic 3: Circle Onion Layers */
.onion-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
  width: 100%;
}

.onion-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 440px;
  margin: 0 auto;
}

.onion-svg {
  width: 100%;
  height: 100%;
}

.onion-layer {
  cursor: pointer;
  transition: var(--transition-smooth);
}

.onion-layer path {
  transition: var(--transition-smooth);
}

.onion-layer:hover path,
.onion-layer:hover circle {
  filter: drop-shadow(0 0 15px rgba(200, 155, 60, 0.4));
  stroke: var(--color-gold);
  stroke-width: 3px;
}


.onion-text {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  pointer-events: none;
  fill: var(--color-forest);
  transition: var(--transition-fast);
}

.onion-layer:hover .onion-text {
  fill: var(--color-gold);
}

.onion-details-panel {
  position: relative;
  background: var(--color-light-gray);
  border-radius: 24px;
  border-left: 6px solid var(--color-gold);
  padding: 40px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.02);
  min-height: 250px;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.onion-info-display {
  display: none;
  opacity: 0;
  transform: translateY(10px);
}

.onion-info-display.active {
  display: block;
  animation: onionFadeIn 0.4s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes onionFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.onion-info-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-forest);
  margin-bottom: 12px;
  line-height: 1.3;
}

.onion-info-desc {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text-dark);
}



/* Footer & Quote Box */
footer {
  background-color: var(--color-forest);
  color: var(--color-white);
  padding: 120px 0 60px 0;
  position: relative;
  overflow: hidden;
}

.footer-decor {
  opacity: 0.03;
}

.footer-quote-box {
  max-width: 1000px;
  margin: 0 auto 80px auto;
  text-align: center;
  position: relative;
  padding: 40px;
}

.footer-quote-box::before {
  content: '“';
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-title);
  font-size: 180px;
  color: rgba(255, 255, 255, 0.1);
  line-height: 1;
}

.footer-quote-text {
  font-family: var(--font-title);
  font-size: clamp(24px, 3.5vw, 36px);
  line-height: 1.6;
  font-weight: 400;
  margin-bottom: 40px;
  position: relative;
  z-index: 2;
}

.footer-divider {
  width: 120px;
  height: 2px;
  background-color: var(--color-gold);
  margin: 0 auto 40px auto;
}

.author-box {
  text-align: center;
}

.author-label {
  font-family: var(--font-sans);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
}

.author-name {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  margin-bottom: 40px;
}

.footer-icons {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-icon {
  width: 32px;
  height: 32px;
  color: rgba(255, 255, 255, 0.3);
  transition: var(--transition-fast);
}

.footer-icon:hover {
  color: var(--color-gold);
  transform: scale(1.1);
}

.footer-copyright {
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.05em;
}

/* Animations / Intersection Observer classes */
.reveal {
  opacity: 0;
  transition: var(--transition-smooth);
}

.reveal.reveal-up {
  transform: translateY(60px);
}

.reveal.reveal-left {
  transform: translateX(-60px);
}

.reveal.reveal-right {
  transform: translateX(60px);
}

.reveal.reveal-zoom {
  transform: scale(0.95);
}

.reveal.active {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* SVG Line Drawing Path */
.path-drawing {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 2.5s ease-out;
}

.path-drawing.active {
  stroke-dashoffset: 0;
}

/* Responsive Styles */
@media (max-width: 1200px) {
  .data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 20px;
  }
}

@media (max-width: 992px) {
  .sapo-card {
    font-size: 22px;
    padding: 30px;
  }
  
  .section-title {
    font-size: 34px;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .onion-container {
    grid-template-columns: 1fr;
    gap: 45px;
  }
  
  .onion-visual {
    max-width: 440px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  
  .desktop-only {
    display: none !important;
  }
  
  .hero-section {
    padding: 80px 0 50px 0;
  }
  
  .main-title {
    font-size: 40px;
  }
  
  .sapo-card {
    font-size: 20px;
    padding: 24px;
    border-left-width: 4px;
  }
  
  .data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px 15px;
  }
  
  .data-number {
    font-size: 32px;
  }
  
  .paragraph-content p {
    font-size: 20px;
    margin-bottom: 25px;
  }
  
  .paragraph-content p:first-of-type::first-letter {
    font-size: 64px;
    margin-right: 8px;
    margin-top: 6px;
  }
  
  .pull-quote {
    padding: 40px 24px;
    margin: 50px 0;
  }
  
  .pull-quote p {
    font-size: 24px;
  }
  
  .infographic-wrapper {
    padding: 40px 20px;
    margin: 60px 0;
    border-radius: 20px;
  }
  
  .infographic-title {
    font-size: 26px;
    margin-bottom: 30px;
  }
  
  .timeline-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-left: 40px;
  }
  
  .timeline-node {
    flex-direction: row;
    text-align: left;
    align-items: center;
  }
  
  .timeline-point {
    margin-bottom: 0;
    margin-right: 20px;
    flex-shrink: 0;
  }
  
  .timeline-svg-bg {
    display: none; /* Hide horizontal path on mobile */
  }
  
  /* Vertical indicator line for mobile timeline */
  .timeline-grid::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 72px;
    width: 2px;
    height: calc(100% - 60px);
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 10px,
      var(--color-gold-light) 10px,
      var(--color-gold-light) 20px
    );
    z-index: 1;
  }
  
  /* IoT Dashboard Tab layout on Mobile */
  .dashboard-info {
    display: block !important;
    position: relative;
    width: 100%;
  }
  
  .info-card {
    display: none !important;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    padding: 24px;
    border-radius: 20px;
    border: 1px solid var(--color-glass-border);
    background: var(--color-white);
    margin-bottom: 0;
  }
  
  .info-card.active {
    display: flex !important;
    opacity: 1;
    transform: translateY(0);
    box-shadow: 0 15px 30px rgba(31, 107, 69, 0.08);
    animation: dashboardCardFadeIn 0.4s forwards cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  @keyframes dashboardCardFadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .onion-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .onion-details-panel {
    min-height: 240px;
    padding: 30px 20px;
  }
  
  .onion-info-display {
    left: 20px;
    right: 20px;
  }
  
  .footer-quote-box {
    padding: 20px;
  }
  
  .footer-quote-text {
    font-size: 22px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-section {
    padding: 60px 0 40px 0;
  }
  
  .main-title {
    font-size: 32px;
    line-height: 1.25;
    margin-bottom: 25px;
  }
  
  .sapo-card {
    font-size: 17px;
    padding: 20px 16px;
    border-left-width: 4px;
    margin-bottom: 35px;
  }
  
  /* Data grid thành 1 cột */
  .data-highlight-bar {
    padding: 40px 0;
    margin-bottom: 60px;
  }
  
  .data-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .data-item {
    padding: 15px;
    background: rgba(31, 107, 69, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(31, 107, 69, 0.05);
  }
  
  .data-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
  }
  
  .data-number {
    font-size: 28px;
  }
  
  .data-label {
    font-size: 13px;
  }
  
  /* Typography */
  .section-number {
    font-size: 56px;
  }
  
  .section-title {
    font-size: 26px;
    padding-bottom: 10px;
  }
  
  .paragraph-content p {
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 20px;
  }
  
  /* Drop cap chỉnh lại cho khít */
  .paragraph-content p:first-of-type::first-letter {
    font-size: 52px;
    line-height: 0.85;
    margin-top: 4px;
    margin-right: 6px;
  }
  
  .pull-quote {
    padding: 30px 16px;
    margin: 35px 0;
  }
  
  .pull-quote p {
    font-size: 20px;
  }
  
  .pull-quote::before {
    font-size: 80px;
    top: -5px;
    left: 15px;
  }
  
  /* Infographic wrapper */
  .infographic-wrapper {
    padding: 25px 15px;
    margin: 40px 0;
    border-radius: 16px;
  }
  
  .infographic-title {
    font-size: 20px;
    margin-bottom: 25px;
  }
  
  /* Timeline dọc cho di động cực nhỏ */
  .timeline-grid {
    padding-left: 20px;
    gap: 25px;
  }
  
  .timeline-point {
    width: 50px;
    height: 50px;
    margin-right: 15px;
  }
  
  .timeline-point svg {
    width: 22px;
    height: 22px;
  }
  
  .timeline-grid::before {
    left: 45px; /* 20px padding-left + 25px (nửa chiều rộng point 50px) */
    top: 25px;
    height: calc(100% - 50px);
  }
  
  .timeline-title {
    font-size: 15px;
  }
  
  /* IoT Dashboard Node Label trong SVG */
  .node-label {
    font-size: 15px;
  }
  
  /* Onion Layers details */
  .onion-container {
    gap: 20px;
  }
  
  .onion-details-panel {
    padding: 25px 15px;
    min-height: 220px;
  }
  
  .onion-info-title {
    font-size: 22px;
    margin-bottom: 8px;
  }
  
  .onion-info-desc {
    font-size: 16px;
  }
  
  /* Footer */
  footer {
    padding: 80px 0 40px 0;
  }
  
  .footer-quote-box {
    padding: 10px;
    margin-bottom: 30px;
  }
  
  .footer-quote-text {
    font-size: 18px;
  }
  
  .author-name {
    font-size: 20px;
    margin-bottom: 25px;
  }
  
  .footer-icons {
    gap: 25px;
    margin-bottom: 25px;
  }
  
  .footer-copyright {
    font-size: 12px;
  }
}