/* ==========================================================================
   skylumo - Premium Architectural Minimalist Design (with Subtle Color Pop)
   ========================================================================== */

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

:root {
  --bg-main: #F7F7F5;
  --bg-secondary: #E8E8E4;
  --bg-card: #FFFFFF;
  --text-primary: #111111;
  --text-secondary: #626262;
  --border-color: #CCCCCC;
  --border-dark: #111111;
  --btn-bg: #111111;
  --btn-text: #FFFFFF;

  /* Refined Accent Colors for a Subtle Pop */
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-green: #16a34a;
  --accent-amber: #d97706;

  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 1240px;
  --radius: 2px;
  --transition: all 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Common Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 4rem;
}

h2 {
  font-size: 2.75rem;
}

h3 {
  font-size: 1.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  font-weight: 400;
}

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

a:hover {
  color: var(--accent-blue);
}

/* Accent Highlight Text */
.gradient-text {
  color: var(--accent-blue);
  background: none;
  -webkit-text-fill-color: initial;
  font-style: italic;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: var(--accent-blue);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px rgba(22, 163, 74, 0.6);
}

/* Section Header */
.section-header {
  text-align: left;
  max-width: 760px;
  margin-bottom: 4rem;
  border-left: 3px solid var(--accent-blue);
  padding-left: 1.5rem;
}

.section-header h2 {
  margin-bottom: 0.75rem;
}

.section-header p {
  font-size: 1.1rem;
}

/* Square / Architectural Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 2rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border-dark);
  white-space: nowrap;
}

.btn-primary {
  background: var(--btn-bg);
  color: var(--btn-text) !important;
}

.btn-primary:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #FFFFFF !important;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary) !important;
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: var(--accent-blue);
  color: var(--accent-blue) !important;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 247, 245, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
}

.brand-logo {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-logo::after {
  content: ".";
  color: var(--accent-blue);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

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

.nav-cta {
  display: flex;
  align-items: center;
}

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
}

/* Hero Section (Asymmetrical Editorial Layout) */
.hero {
  padding: 6rem 0 5rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1.5rem;
  line-height: 1.08;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.stat-item .stat-num {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
}

.stat-item .stat-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

/* Abstract Architectural Canvas Element */
.hero-architectural {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  position: relative;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.arch-canvas-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.arch-title {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-primary);
}

.arch-status {
  font-size: 0.78rem;
  color: var(--accent-blue);
  font-weight: 600;
}

.arch-grid-lines {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.arch-node-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.arch-node-box:hover {
  border-color: var(--accent-blue);
}

.arch-node-name {
  font-size: 0.85rem;
  font-weight: 500;
}

.arch-node-ping {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-green);
  background: #f0fdf4;
  padding: 0.15rem 0.5rem;
  border: 1px solid #bbf7d0;
}

.arch-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Bento Grid System */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  transition: var(--transition);
  position: relative;
}

.bento-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}

.bento-icon {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 1.5rem;
  width: 44px;
  height: 44px;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eff6ff;
}

.bento-card h3 {
  margin-bottom: 0.85rem;
}

.bento-card p {
  font-size: 0.98rem;
}

/* Network Nodes Section */
.network-section {
  padding: 6rem 0;
}

.network-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 4rem 3rem;
  text-align: center;
}

.network-box h2 {
  margin-bottom: 1rem;
}

.nodes-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}

.node-tag {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition);
}

.node-tag:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* AI & Streaming Section */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
}

.scenario-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.75rem;
}

.scen-tag {
  background: #eff6ff;
  color: var(--accent-blue);
  border: 1px solid #bfdbfe;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-weight: 500;
}

/* SaaS Pricing Section */
.pricing-section {
  padding: 6rem 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 3rem 2.25rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--accent-blue);
}

/* Recommended Package (Inverted Dark Panel with Blue Pop Accent Badge) */
.pricing-card.featured {
  background: #111111;
  color: #FFFFFF;
  border: 2px solid var(--accent-blue);
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.pricing-card.featured .plan-name,
.pricing-card.featured .plan-price {
  color: #FFFFFF;
}

.pricing-card.featured .plan-desc,
.pricing-card.featured .plan-price span,
.pricing-card.featured .plan-features li {
  color: #CCCCCC;
}

.pricing-card.featured .btn-primary {
  background: var(--accent-blue);
  color: #FFFFFF !important;
  border-color: var(--accent-blue);
}

.pricing-card.featured .btn-primary:hover {
  background: var(--accent-blue-hover);
  border-color: var(--accent-blue-hover);
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 2rem;
  background: var(--accent-blue);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.85rem;
  border: 1px solid var(--accent-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plan-name {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.plan-price-label {
  font-family: var(--font-body);
  font-size: 1.15rem;
  font-weight: 600;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  margin-bottom: 2rem;
}

.pricing-card.featured .plan-price-label {
  border-color: #333333;
  color: #FFFFFF;
}

.plan-features {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.plan-features li::before {
  content: "—";
  color: var(--accent-blue);
  font-weight: bold;
}

.pricing-card.featured .plan-features li::before {
  color: #60a5fa;
}

/* Articles Section */
.articles-section {
  padding: 6rem 0;
}

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

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.art-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.art-category {
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.article-card h3 {
  font-size: 1.45rem;
  margin-bottom: 0.85rem;
  line-height: 1.25;
}

.article-card h3 a {
  color: var(--text-primary);
}

.article-card h3 a:hover {
  color: var(--accent-blue);
}

.art-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.art-readmore {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.test-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
}

.test-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
  line-height: 1.4;
  font-style: italic;
}

.test-author {
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.test-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--accent-blue);
}

.test-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.test-role {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Accordion FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--border-color);
}

.faq-question {
  width: 100%;
  padding: 1.5rem 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.faq-icon {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 300;
  transition: transform 0.3s ease;
  color: var(--text-secondary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--text-secondary);
  font-size: 1rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 1.5rem;
}

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

/* Footer */
.footer {
  margin-top: 8rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 2.5rem 0;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3.5rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.92rem;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-body);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.footer-links a {
  color: var(--text-secondary);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  text-align: center;
  color: var(--text-secondary);
}

.recom-sites {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 0.88rem;
}

.recom-sites a {
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.recom-sites a:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

/* Article & Subpage Layout */
.page-header {
  padding: 5rem 0 3rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 4rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.article-container {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 2rem;
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.85;
  color: #222222;
}

.article-content h2 {
  font-size: 2.2rem;
  margin: 3rem 0 1.5rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem 0;
}

.article-content p {
  margin-bottom: 1.6rem;
  color: #333333;
}

.article-content ul, .article-content ol {
  margin: 1.5rem 0 1.75rem 2rem;
}

.article-content li {
  margin-bottom: 0.65rem;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2.5rem 0;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
}

.article-content th, .article-content td {
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  text-align: left;
}

.article-content th {
  background: var(--bg-secondary);
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--text-primary);
}

.article-cta-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 3.5rem 2.5rem;
  text-align: center;
  margin: 4rem 0;
}

.related-articles {
  margin-top: 5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-color);
}

/* Mobile & Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  h1 {
    font-size: 3.2rem;
  }
  
  .bento-grid, .pricing-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 5rem;
    left: 0;
    right: 0;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-150%);
    transition: transform 0.3s ease-in-out;
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2.1rem;
  }
  
  .bento-grid, .scenarios-grid, .pricing-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .article-content table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}