/* ==========================================
   GLOBAL NETWORK ATLAS - DESIGN SYSTEM CSS
   Theme: Cartography & Geographic Network Infrastructure
   ========================================== */

:root {
  --bg-main: #F7F5EF;
  --bg-alt1: #FAFAF7;
  --bg-alt2: #F2F3F0;
  --bg-alt3: #EEF2F3;
  --text-primary: #14202B;
  --text-muted: #697784;
  --dark-blue: #143B5D;
  --net-blue: #2C7FB8;
  --node-green: #2F9E6F;
  --grid-line: #D8DEE4;
  --map-contour: #C9D2D8;
  --main-cta: #143B5D;
  --accent-gold: #C8963E;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --max-width: 1280px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-main);
  background-image: 
    linear-gradient(to right, rgba(216, 222, 228, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(216, 222, 228, 0.35) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: center top;
}

/* Geographic coordinate corner decorations */
body::before {
  content: "LAT 22.3193° N  |  LONG 114.1694° E  |  GLOBAL ATLAS v3.0";
  position: fixed;
  bottom: 12px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: rgba(105, 119, 132, 0.45);
  pointer-events: none;
  z-index: 999;
  display: none;
}
@media (min-width: 1024px) {
  body::before { display: block; }
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Typography Utilities */
.mono-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--net-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.mono-label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--node-green);
  border-radius: 50%;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark-blue);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================
   HEADER
   ========================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(247, 245, 239, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--grid-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--dark-blue);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: var(--net-blue);
  stroke-width: 2.2;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  border: 1px solid var(--grid-line);
  padding: 2px 6px;
  border-radius: 2px;
  letter-spacing: 0.8px;
  background: var(--bg-alt1);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
  padding: 4px 0;
}

.nav-link:hover {
  color: var(--net-blue);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--net-blue);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--dark-blue);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 4px rgba(20, 59, 93, 0.15);
  transition: var(--transition);
}

.header-cta-btn:hover {
  background-color: #1a4a75;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(20, 59, 93, 0.25);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--dark-blue);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
  padding: 60px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 45% 55%;
    gap: 32px;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-coord-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dark-blue);
  background-color: var(--bg-alt3);
  border: 1px solid var(--grid-line);
  padding: 4px 12px;
  border-radius: 20px;
  width: fit-content;
}

.hero-coord-badge .pulse-dot {
  width: 6px;
  height: 6px;
  background-color: var(--node-green);
  border-radius: 50%;
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
  100% { transform: scale(0.9); opacity: 1; }
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.2;
  font-weight: 800;
  color: var(--dark-blue);
  letter-spacing: -0.03em;
}

.hero-title span {
  color: var(--net-blue);
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--dark-blue);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(20, 59, 93, 0.2);
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: #1a4b75;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 59, 93, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--bg-alt1);
  color: var(--dark-blue);
  border: 1px solid var(--dark-blue);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-secondary:hover {
  background-color: var(--bg-alt3);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
  padding-top: 20px;
  border-top: 1px dashed var(--grid-line);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Hero Map Graphic */
.hero-map-container {
  position: relative;
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 8px 30px rgba(20, 59, 93, 0.06);
  width: 100%;
  overflow: hidden;
}

.hero-map-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--grid-line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.map-status-live {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--node-green);
  font-weight: 600;
}

.map-status-live::before {
  content: "";
  width: 6px;
  height: 6px;
  background-color: var(--node-green);
  border-radius: 50%;
  animation: pulse-ring 1.5s infinite;
}

.hero-svg-wrapper {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  position: relative;
}

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

/* Map SVG Animation Elements */
.map-grid-line {
  stroke: var(--grid-line);
  stroke-width: 0.8;
  stroke-dasharray: 4 4;
}

.map-land {
  fill: var(--map-contour);
  stroke: #B5C1C9;
  stroke-width: 0.7;
}

.route-arc {
  fill: none;
  stroke: var(--net-blue);
  stroke-width: 1.8;
  stroke-dasharray: 6 6;
  animation: dash-flow 25s linear infinite;
}

@keyframes dash-flow {
  from { stroke-dashoffset: 500; }
  to { stroke-dashoffset: 0; }
}

.map-node {
  cursor: pointer;
  transition: transform 0.2s ease;
}

.map-node:hover {
  transform: scale(1.25);
}

.node-label-bg {
  fill: rgba(20, 59, 93, 0.85);
  rx: 3px;
}

.node-label-text {
  fill: #ffffff;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
}

.map-overlay-badge {
  position: absolute;
  bottom: 16px;
  right: 16px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--grid-line);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dark-blue);
  display: flex;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* ==========================================
   GLOBAL NETWORK NODES SECTION
   ========================================== */
.nodes-section {
  padding: 80px 0;
  background-color: var(--bg-alt1);
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 32px 0 24px;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 18px;
  border: 1px solid var(--grid-line);
  background-color: var(--bg-main);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-weight: 600;
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--dark-blue);
  color: #ffffff;
  border-color: var(--dark-blue);
}

.nodes-display-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 1024px) {
  .nodes-display-grid {
    grid-template-columns: 1fr 340px;
  }
}

.node-cards-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.node-card {
  background-color: var(--bg-main);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  position: relative;
  transition: var(--transition);
}

.node-card:hover {
  border-color: var(--net-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(44, 127, 184, 0.12);
}

.node-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--net-blue);
  background-color: rgba(44, 127, 184, 0.08);
  padding: 2px 8px;
  border-radius: 2px;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--node-green);
  display: flex;
  align-items: center;
  gap: 4px;
}

.node-ping::before {
  content: "";
  width: 6px;
  height: 6px;
  background-color: var(--node-green);
  border-radius: 50%;
}

.node-location {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: 4px;
}

.node-region-tag {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.region-details-panel {
  background-color: var(--bg-main);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-header {
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 12px;
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.panel-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.panel-stat-label {
  color: var(--text-muted);
}

.panel-stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--dark-blue);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-item {
  font-size: 0.78rem;
  background-color: var(--bg-alt2);
  border: 1px solid var(--grid-line);
  padding: 3px 8px;
  border-radius: 2px;
  color: var(--text-primary);
}

/* ==========================================
   NETWORK JOURNEY / ROUTE CAPABILITY
   ========================================== */
.journey-section {
  padding: 80px 0;
}

.journey-pipeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 40px;
}

@media (min-width: 1024px) {
  .journey-pipeline {
    grid-template-columns: repeat(5, 1fr);
  }
}

.journey-step {
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 24px 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.journey-step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--net-blue);
  font-weight: 700;
}

.journey-step-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.journey-step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.journey-arrow {
  display: none;
}
@media (min-width: 1024px) {
  .journey-step:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 16px;
    color: var(--net-blue);
    z-index: 2;
    background: var(--bg-main);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--grid-line);
  }
}

/* ==========================================
   AI & STREAMING SECTION
   ========================================== */
.services-section {
  padding: 80px 0;
  background-color: var(--bg-alt2);
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.service-card {
  background-color: var(--bg-main);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.service-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 16px;
}

.service-type-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.service-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--net-blue);
  background-color: var(--bg-alt3);
  padding: 4px 10px;
  border-radius: 2px;
  border: 1px solid var(--grid-line);
}

.service-items-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.service-item-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--dark-blue);
}

.service-item-chip svg {
  width: 18px;
  height: 18px;
  fill: var(--net-blue);
}

/* ==========================================
   GEOGRAPHIC ROUTE PRICING
   ========================================== */
.pricing-section {
  padding: 90px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 48px;
}

@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pricing-card {
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.pricing-card.recommended {
  border: 2px solid var(--dark-blue);
  background-color: #ffffff;
  box-shadow: 0 10px 30px rgba(20, 59, 93, 0.12);
}

.recommended-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background-color: var(--dark-blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 2px;
  letter-spacing: 1px;
}

.pricing-plan-no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--dark-blue);
}

.pricing-traffic {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--net-blue);
  margin-top: 4px;
}

.pricing-price-wrapper {
  margin: 24px 0;
  padding: 16px 0;
  border-top: 1px dashed var(--grid-line);
  border-bottom: 1px dashed var(--grid-line);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--dark-blue);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li::before {
  content: "✓";
  color: var(--node-green);
  font-weight: bold;
}

.pricing-cta-btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.pricing-card.recommended .pricing-cta-btn {
  background-color: var(--dark-blue);
  color: #ffffff;
}

.pricing-card.recommended .pricing-cta-btn:hover {
  background-color: #1a4a75;
}

.pricing-card:not(.recommended) .pricing-cta-btn {
  background-color: var(--bg-main);
  color: var(--dark-blue);
  border: 1px solid var(--dark-blue);
}

.pricing-card:not(.recommended) .pricing-cta-btn:hover {
  background-color: var(--dark-blue);
  color: #ffffff;
}

/* ==========================================
   SEO FIELD GUIDES (BLOG CARDS)
   ========================================== */
.guides-section {
  padding: 80px 0;
  background-color: var(--bg-alt1);
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .guides-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.guide-card {
  background-color: var(--bg-main);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.guide-card:hover {
  border-color: var(--net-blue);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.04);
}

.guide-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.guide-number {
  color: var(--net-blue);
  font-weight: 700;
}

.guide-category {
  color: var(--text-muted);
  background-color: var(--bg-alt2);
  padding: 2px 6px;
  border-radius: 2px;
}

.guide-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: 10px;
  line-height: 1.4;
}

.guide-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.guide-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--grid-line);
  font-size: 0.82rem;
}

.guide-read-link {
  font-weight: 600;
  color: var(--dark-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.guide-read-link:hover {
  color: var(--net-blue);
}

/* ==========================================
   GLOBAL USER NOTES (TESTIMONIALS)
   ========================================== */
.notes-section {
  padding: 80px 0;
}

.notes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
}

@media (min-width: 768px) {
  .notes-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.note-card {
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.note-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 10px;
}

.note-id {
  color: var(--net-blue);
  font-weight: 700;
}

.note-route {
  color: var(--dark-blue);
}

.note-quote {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
  font-style: italic;
}

.note-tag {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* ==========================================
   ATLAS INDEX ACCORDION (FAQ)
   ========================================== */
.faq-section {
  padding: 80px 0;
  background-color: var(--bg-alt1);
  border-top: 1px solid var(--grid-line);
}

.faq-accordion {
  max-width: 860px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: 1px solid var(--grid-line);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-blue);
}

.faq-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--net-blue);
  margin-right: 12px;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
}

.faq-item.active .faq-content {
  max-height: 300px;
}

.faq-inner {
  padding-bottom: 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ==========================================
   ARTICLE / EDITORIAL CONTENT PAGE STYLES
   ========================================== */
.article-container {
  max-width: 900px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.breadcrumb-nav {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-nav a {
  color: var(--net-blue);
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 24px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--dark-blue);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.article-summary-lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--grid-line);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-blue);
  margin: 28px 0 12px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 4px solid var(--net-blue);
  background-color: var(--bg-alt3);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--dark-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-diagram-box {
  background-color: var(--bg-alt1);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-sm);
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}

.article-cta-box {
  background-color: var(--bg-alt3);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 40px 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  color: var(--dark-blue);
  margin: 0;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background-color: var(--dark-blue);
  color: #FAFAF7;
  padding: 70px 0 30px;
  border-top: 1px solid #1c4b75;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-title {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #90A4AE;
  letter-spacing: 1px;
}

.footer-desc {
  font-size: 0.88rem;
  color: #B0BEC5;
  line-height: 1.6;
  max-width: 360px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  color: #90A4AE;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
}

.footer-links a {
  color: #ECEFF1;
}

.footer-links a:hover {
  color: #4FC3F7;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: #90A4AE;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-friends {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-friends a {
  color: #B0BEC5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-friends a:hover {
  color: #ffffff;
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--grid-line);
  padding: 24px;
  flex-direction: column;
  gap: 16px;
  z-index: 99;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.mobile-nav-drawer.open {
  display: flex;
}

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
  }
}