:root {
  --color-bg: #0a0e1a;
  --color-bg-secondary: #111827;
  --color-bg-tertiary: #1a2332;
  --color-text: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-text-muted: #6b7280;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-accent: #8b5cf6;
  --color-success: #10b981;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-strong: rgba(255, 255, 255, 0.2);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  padding: 1rem 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.main-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
  position: relative;
}

.main-nav a:hover {
  color: var(--color-primary);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.lang-switcher {
  display: flex;
  gap: 0.5rem;
  background: var(--color-bg-secondary);
  padding: 0.25rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 0.375rem;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.lang-btn:hover {
  color: var(--color-text);
  background: var(--color-bg-tertiary);
}

.lang-btn.active {
  background: var(--color-primary);
  color: white;
}

.hero-section {
  padding: 8rem 0 6rem;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.15), transparent 50%);
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 3rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

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

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

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

section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--color-text), var(--color-text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-intro {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

.what-section {
  background: var(--color-bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--color-bg-tertiary);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.feature-text {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.concept-content {
  max-width: 900px;
  margin: 0 auto;
}

.concept-block {
  margin-bottom: 3rem;
}

.concept-heading {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.concept-block p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.concept-list {
  list-style: none;
  margin-left: 0;
}

.concept-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.concept-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.comparison-table {
  background: var(--color-bg-secondary);
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-top: 1.5rem;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
}

.comparison-cell {
  background: var(--color-bg-tertiary);
  padding: 1.25rem;
  color: var(--color-text-secondary);
}

.comparison-header {
  background: var(--color-bg);
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.125rem;
}

.comparison-row:last-child .comparison-cell {
  border-bottom: none;
}

.concept-highlight {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  border-left: 4px solid var(--color-primary);
  padding: 1.5rem;
  border-radius: 0.5rem;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  font-weight: 500;
}

.roadmap-section {
  background: var(--color-bg-secondary);
}

.timeline {
  max-width: 900px;
  margin: 3rem auto 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 1.5rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.timeline-item {
  position: relative;
  padding-left: 5rem;
  padding-bottom: 3rem;
}

.timeline-marker {
  position: absolute;
  left: 0.75rem;
  top: 0.5rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  border: 3px solid var(--color-bg-secondary);
  z-index: 1;
}

.phase-1 { background: var(--color-success); }
.phase-2 { background: var(--color-primary); }
.phase-3 { background: var(--color-accent); }
.phase-4 { background: #ec4899; }

.timeline-content {
  background: var(--color-bg-tertiary);
  padding: 2rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline-date {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
}

.timeline-list {
  list-style: none;
}

.timeline-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.timeline-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: bold;
}

.progress-content {
  max-width: 900px;
  margin: 0 auto;
}

.status-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
  border: 1px solid var(--color-success);
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 3rem;
}

.status-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.status-complete {
  background: var(--color-success);
  color: white;
}

.status-version {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.status-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.status-text {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.progress-block {
  background: var(--color-bg-secondary);
  padding: 2rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
}

.progress-heading {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.progress-list {
  list-style: none;
}

.progress-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.75rem;
  padding-left: 2rem;
  position: relative;
}

.architecture-section {
  background: var(--color-bg-secondary);
}

.architecture-layers {
  max-width: 900px;
  margin: 3rem auto 0;
}

.arch-layer {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition-normal);
}

.arch-layer:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.arch-layer-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.arch-layer-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.125rem;
}

.arch-layer-title {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
}

.arch-layer-text {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.arch-layer-text p {
  margin-bottom: 1rem;
}

.arch-list {
  list-style: none;
  margin-top: 1rem;
}

.arch-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.arch-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.arch-flow {
  max-width: 900px;
  margin: 4rem auto 0;
  background: var(--color-bg);
  padding: 2rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border-strong);
}

.arch-flow-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--color-text);
  text-align: center;
}

.arch-flow-list {
  list-style: none;
  counter-reset: flow-counter;
}

.arch-flow-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  padding-left: 3rem;
  position: relative;
  counter-increment: flow-counter;
}

.arch-flow-list li::before {
  content: counter(flow-counter);
  position: absolute;
  left: 0;
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.community-card {
  background: var(--color-bg-secondary);
  padding: 2rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.community-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.community-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.community-card-text {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.community-card-text ul {
  list-style: none;
  margin-top: 1rem;
}

.community-card-text li {
  margin-bottom: 0.5rem;
  padding-left: 1.5rem;
  position: relative;
}

.community-card-text li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.code-block {
  background: var(--color-bg);
  padding: 1rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.6;
}

.community-footer {
  text-align: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.blog-section {
  background: var(--color-bg-secondary);
}

.blog-post {
  max-width: 800px;
  margin: 3rem auto 0;
  background: var(--color-bg-tertiary);
  padding: 3rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
}

.blog-post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-post-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
  line-height: 1.3;
}

.blog-post-date {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.blog-post-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 2rem;
  margin-top: 5rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 2rem;
}

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

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.footer-tagline {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

[dir="rtl"] {
  direction: rtl;
}

[dir="rtl"] .header-content {
  flex-direction: row-reverse;
}

[dir="rtl"] .main-nav {
  flex-direction: row-reverse;
}

[dir="rtl"] .lang-switcher {
  order: -1;
}

[dir="rtl"] .hero-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .concept-list li,
[dir="rtl"] .arch-list li,
[dir="rtl"] .timeline-list li,
[dir="rtl"] .progress-list li,
[dir="rtl"] .community-card-text li {
  padding-left: 0;
  padding-right: 1.5rem;
}

[dir="rtl"] .concept-list li::before,
[dir="rtl"] .arch-list li::before,
[dir="rtl"] .timeline-list li::before {
  left: auto;
  right: 0;
}

[dir="rtl"] .arch-flow-list li {
  padding-left: 0;
  padding-right: 3rem;
}

[dir="rtl"] .arch-flow-list li::before {
  left: auto;
  right: 0;
}

[dir="rtl"] .timeline {
  padding-left: 0;
  padding-right: 0;
}

[dir="rtl"] .timeline::before {
  left: auto;
  right: 1.5rem;
}

[dir="rtl"] .timeline-item {
  padding-left: 0;
  padding-right: 5rem;
}

[dir="rtl"] .timeline-marker {
  left: auto;
  right: 0.75rem;
}

[dir="rtl"] .concept-highlight {
  border-left: none;
  border-right: 4px solid var(--color-primary);
}

[dir="rtl"] .footer-content {
  flex-direction: row-reverse;
}

[dir="rtl"] .footer-links {
  flex-direction: row-reverse;
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .main-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    font-size: 0.875rem;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .hero-tagline {
    font-size: 1.125rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .progress-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-row {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 0.5rem;
  }
  
  .timeline-item {
    padding-left: 3rem;
  }
  
  .timeline-marker {
    left: 0;
    width: 1rem;
    height: 1rem;
  }
  
  .blog-post {
    padding: 2rem 1.5rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
  
  [dir="rtl"] .timeline::before {
    right: 0.5rem;
  }
  
  [dir="rtl"] .timeline-item {
    padding-right: 3rem;
  }
  
  [dir="rtl"] .timeline-marker {
    right: 0;
  }
}