:root {
  --primary: #2c5282;
  --primary-dark: #1a365d;
  --primary-light: #4299e1;
  --accent: #ed8936;
  --accent-light: #f6ad55;
  --bg: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #475569;
  --success: #10b981;
  --warning: #f59e0b;
  --gradient-1: linear-gradient(135deg, #2c5282 0%, #4299e1 100%);
  --gradient-2: linear-gradient(135deg, #1a365d 0%, #2c5282 100%);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-light);
}

.nav-cta {
  background: var(--gradient-1);
  color: white;
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text);
  transition: 0.3s;
}

/* Hero Section */
.hero {
  padding: 10rem 0 6rem;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at top, rgba(66, 153, 225, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(66, 153, 225, 0.15);
  border: 1px solid rgba(66, 153, 225, 0.3);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary-light);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-light);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: white;
}

.btn-accent:hover {
  transform: translateY(-2px);
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-top: 4rem;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Section Styles */
section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid var(--border);
  transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Architecture Section */
.architecture {
  background: var(--bg-secondary);
}

.arch-diagram {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  margin-top: 2rem;
}

/* Code Blocks */
.code-block {
  background: #0d1117;
  border-radius: 12px;
  overflow: hidden;
  margin: 1.5rem 0;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27c93f; }

.code-title {
  margin-left: 1rem;
  color: #8b949e;
  font-size: 0.875rem;
}

.code-block pre {
  padding: 1.5rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
}

.code-block code {
  color: #e6edf3;
}

.code-block .keyword { color: #ff7b72; }
.code-block .string { color: #a5d6ff; }
.code-block .comment { color: #8b949e; }
.code-block .function { color: #d2a8ff; }
.code-block .variable { color: #ffa657; }
.code-block .operator { color: #79c0ff; }

/* Layer Types Table */
.layer-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
}

.layer-table th,
.layer-table td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.layer-table th {
  background: var(--bg-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.layer-table tr:last-child td {
  border-bottom: none;
}

.layer-table code {
  background: rgba(66, 153, 225, 0.15);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--primary-light);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid var(--border);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.card ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.card li {
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
}

.card li::before {
  content: '>';
  color: var(--primary-light);
  font-weight: bold;
}

/* CTA Section */
.cta {
  background: var(--gradient-2);
  text-align: center;
  padding: 6rem 2rem;
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
}

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

.footer-brand p {
  color: var(--text-muted);
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

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

.footer-links a {
  color: var(--text);
  text-decoration: none;
  display: block;
  padding: 0.4rem 0;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Page Header */
.page-header {
  padding: 10rem 0 4rem;
  background: var(--bg-secondary);
  text-align: center;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--primary-light);
}

.breadcrumb span {
  color: var(--text-muted);
}

/* Content Pages */
.content-page {
  padding: 4rem 0;
}

.content-page .container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 4rem;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 0.25rem;
}

.sidebar-nav a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--bg-card);
  color: var(--primary-light);
}

/* Main Content */
.main-content h2 {
  font-size: 2rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-top: 1rem;
}

.main-content h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.main-content h4 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.main-content p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.main-content ul,
.main-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-muted);
}

.main-content li {
  margin-bottom: 0.5rem;
}

.main-content strong {
  color: var(--text);
}

/* Callout */
.callout {
  background: var(--bg-card);
  border-left: 4px solid var(--primary-light);
  padding: 1.5rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
}

.callout-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.callout p {
  margin: 0;
}

.callout.warning {
  border-left-color: var(--warning);
}

.callout.success {
  border-left-color: var(--success);
}

/* Podcast Episode Cards */
.episode-grid {
  display: grid;
  gap: 2rem;
}

.episode-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 2rem;
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  align-items: start;
}

.episode-cover {
  width: 120px;
  height: 120px;
  background: var(--gradient-1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.episode-content h3 {
  margin-bottom: 0.5rem;
}

.episode-meta {
  display: flex;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.episode-desc {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.episode-actions {
  display: flex;
  gap: 1rem;
}

.play-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-light);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Business Value Section */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.value-card {
  text-align: center;
  padding: 2rem;
}

.value-card .value-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.value-card .value-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 0.5rem;
}

.value-card p {
  color: var(--text-muted);
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table th {
  background: var(--bg-secondary);
}

.comparison-table tr:nth-child(even) {
  background: var(--bg-card);
}

.comparison-table .check {
  color: var(--success);
}

.comparison-table .cross {
  color: #ef4444;
}

/* Mermaid Diagrams */
.mermaid {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  margin: 2rem 0;
  text-align: center;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.tab {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.2s;
}

.tab:hover {
  color: var(--text);
  background: var(--bg-card);
}

.tab.active {
  color: var(--primary-light);
  background: rgba(66, 153, 225, 0.15);
}

/* Responsive */
@media (max-width: 1024px) {
  .content-page .container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .episode-card {
    grid-template-columns: 1fr;
  }

  .episode-cover {
    width: 100%;
    height: 80px;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.highlight {
  background: linear-gradient(135deg, rgba(66, 153, 225, 0.2) 0%, rgba(237, 137, 54, 0.2) 100%);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

/* Accordion */
.accordion {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin: 2rem 0;
}

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

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: none;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}

.accordion-header:hover {
  background: var(--bg-secondary);
}

.accordion-icon {
  font-size: 1.5rem;
  transition: transform 0.2s;
}

.accordion-item.open .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.accordion-item.open .accordion-content {
  padding: 1.5rem;
  max-height: 1000px;
}

.accordion-content p {
  margin: 0;
}