/* Quiet Luxury & Editorial Design System */
:root {
  --bg-primary: #FAF8F5;
  --bg-surface: #EBE7DE;
  --text-primary: #0D0D0D;
  --text-secondary: #2C2A26;
  --text-muted: #5C5850;
  --accent-gold: #B38E56;
  --accent-bronze: #6E5A4A;
  --border-fine: #D1C9BC;
  --border-dark: #0D0D0D;
  --font-serif: 'Cormorant Garamond', 'Playfair Display', 'Noto Serif SC', serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 1280px;
}

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

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

body {
  position: relative;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Canvas Background */
#nebula-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  opacity: 0.6;
}

/* Typography Utility */
.serif-title {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sub-title {
  font-size: 0.9rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent-bronze);
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}

/* Announcement Top Bar */
.announcement-bar {
  background: var(--text-primary);
  color: var(--bg-primary);
  text-align: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  border-bottom: 0.5px solid var(--accent-gold);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.announcement-bar span.tag {
  background: var(--accent-gold);
  color: var(--text-primary);
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.announcement-bar a {
  color: var(--accent-gold);
  text-decoration: underline;
  margin-left: 8px;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--border-fine);
  z-index: 100;
  padding: 20px 40px;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: 0.2em;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo span {
  font-size: 0.8rem;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a:hover {
  color: var(--accent-gold);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-gold);
  transition: width 0.3s ease;
}

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

.nav-cta {
  border: 1px solid var(--text-primary);
  padding: 10px 24px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: all 0.4s ease;
  background: transparent;
}

.nav-cta:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
}

/* Hero Section */
.hero-section {
  padding: 120px 20px 90px;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 40px;
  font-weight: 400;
  line-height: 1.85;
}

.cta-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  padding: 16px 40px;
  background: var(--text-primary);
  color: var(--bg-primary);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 0.5px solid var(--text-primary);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary:hover {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-block;
  padding: 16px 40px;
  background: transparent;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 0.5px solid var(--text-primary);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-outline:hover {
  background: var(--bg-surface);
  border-color: var(--accent-gold);
}

/* Section Shared */
.section {
  padding: 100px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 0.5px solid var(--border-fine);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.2rem;
  margin-top: 8px;
}

/* Node Latency & Status Board */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.status-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-fine);
  padding: 24px;
  transition: all 0.3s ease;
}

.status-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-4px);
}

.status-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 0.5px solid var(--border-fine);
  padding-bottom: 12px;
}

.node-name {
  font-size: 1.05rem;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.node-type {
  font-size: 0.7rem;
  background: var(--bg-primary);
  padding: 3px 8px;
  border: 0.5px solid var(--accent-gold);
  color: var(--accent-bronze);
  letter-spacing: 0.1em;
}

.status-metrics {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.latency-val {
  font-family: monospace;
  font-weight: 600;
  color: #2D7D46; /* Subtle green for low ping */
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.dot {
  width: 7px;
  height: 7px;
  background-color: #2D7D46;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(45, 125, 70, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.pricing-card {
  background: var(--bg-primary);
  border: 0.5px solid var(--border-fine);
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.4s ease;
}

.pricing-card.popular {
  background: var(--bg-surface);
  border-color: var(--accent-gold);
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-gold);
  color: var(--text-primary);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  padding: 4px 12px;
  text-transform: uppercase;
}

.plan-name {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.plan-price {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  color: var(--text-primary);
  margin: 20px 0;
}

.plan-price span {
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin: 20px 0 36px;
  flex-grow: 1;
}

.plan-features li {
  padding: 10px 0;
  border-bottom: 0.5px solid var(--border-fine);
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li::before {
  content: '—';
  color: var(--accent-gold);
}

/* Core Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.advantage-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-fine);
  padding: 36px 28px;
}

.advantage-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent-gold);
  margin-bottom: 12px;
}

.advantage-card h3 {
  font-size: 1.2rem;
  font-family: var(--font-serif);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Knowledge Base / Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 30px;
}

.article-card {
  background: var(--bg-primary);
  border: 0.5px solid var(--border-fine);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-4px);
  background: var(--bg-surface);
}

.article-tag {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--accent-bronze);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 24px;
  line-height: 1.7;
}

.article-link {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.article-card:hover .article-link::after {
  transform: translateX(4px);
}

/* FAQ Accordion */
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--border-fine);
  background: var(--bg-surface);
}

.faq-question {
  padding: 24px;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
}

.faq-answer {
  padding: 0 24px 24px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.8;
  display: none;
  border-top: 1px solid var(--border-fine);
  margin-top: 12px;
  padding-top: 16px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* User Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-fine);
  padding: 32px;
}

.review-text {
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

.review-author {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--text-primary);
}

.review-role {
  font-size: 0.75rem;
  color: var(--accent-bronze);
  letter-spacing: 0.1em;
}

/* Article Detail Page Layout */
.article-detail-container {
  max-width: 860px;
  margin: 60px auto 100px;
  padding: 0 20px;
}

.article-header {
  border-bottom: 0.5px solid var(--border-fine);
  padding-bottom: 30px;
  margin-bottom: 40px;
}

.article-header h1 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  line-height: 1.25;
  margin: 16px 0;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
  letter-spacing: 0.05em;
}

.article-body {
  font-size: 1.02rem;
  color: var(--text-primary);
  line-height: 1.9;
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin: 40px 0 16px;
  border-left: 2px solid var(--accent-gold);
  padding-left: 14px;
}

.article-body h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 28px 0 12px;
}

.article-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
  color: var(--text-secondary);
}

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

.article-cta-box {
  background: var(--bg-surface);
  border: 0.5px solid var(--accent-gold);
  padding: 36px;
  text-align: center;
  margin: 50px 0;
}

.article-cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

/* Footer */
.footer {
  border-top: 0.5px solid var(--border-fine);
  background: var(--bg-surface);
  padding: 60px 20px 30px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
}

.footer-links h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 0.5px solid var(--border-fine);
  padding-top: 24px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    padding: 16px 20px;
  }
  .nav-menu {
    display: none;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .section {
    padding: 60px 20px;
  }
}