:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-glass: rgba(17, 24, 39, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);
  
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-info: #0ea5e9;
  --color-info-bg: rgba(14, 165, 233, 0.1);

  --header-height: 64px;
  --sidebar-width: 280px;
  --toc-width: 240px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.95);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(99, 102, 241, 0.5);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-glow: rgba(79, 70, 229, 0.15);
  
  --color-success: #059669;
  --color-success-bg: rgba(5, 150, 105, 0.08);
  --color-warning: #d97706;
  --color-warning-bg: rgba(217, 119, 6, 0.08);
  --color-danger: #dc2626;
  --color-danger-bg: rgba(220, 38, 38, 0.08);
  --color-info: #0284c7;
  --color-info-bg: rgba(2, 132, 199, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

.version-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--accent-glow);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.btn-header:hover {
  border-color: var(--accent-primary);
  background: var(--bg-tertiary);
  transform: translateY(-1px);
}

.btn-demo {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff !important;
  border: none;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-demo:hover {
  opacity: 0.95;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-telegram {
  background: rgba(14, 165, 233, 0.12);
  border-color: rgba(14, 165, 233, 0.35);
  color: #38bdf8 !important;
}

.btn-telegram:hover {
  background: rgba(14, 165, 233, 0.22);
  border-color: #38bdf8;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.25);
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

/* Layout */
.app-container {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  position: fixed;
  top: var(--header-height);
  left: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border-color);
  background: var(--bg-primary);
  padding: 24px 16px;
  z-index: 90;
  transition: transform 0.3s ease;
}

.search-box {
  margin-bottom: 20px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 36px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.nav-group {
  margin-bottom: 24px;
}

.nav-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-left: 12px;
}

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

.nav-item {
  margin-bottom: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s ease;
}

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

.nav-link.active {
  color: var(--accent-primary);
  font-weight: 600;
  background: var(--accent-glow);
}

/* Main Content */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-right: var(--toc-width);
  padding: 40px 48px 80px;
  max-width: 960px;
}

.hero-banner {
  padding: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.08));
  border: 1px solid var(--border-color);
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
}

.hero-banner::after {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary {
  padding: 10px 20px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

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

/* Sections */
.doc-section {
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.015em;
}

.section-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}

/* Callouts / Alerts */
.callout {
  padding: 16px 20px;
  border-radius: 8px;
  margin: 20px 0;
  border-left: 4px solid;
  font-size: 0.95rem;
  line-height: 1.6;
}

.callout-title {
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.callout-note {
  background: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--text-primary);
}
.callout-note .callout-title { color: var(--color-info); }

.callout-tip {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--text-primary);
}
.callout-tip .callout-title { color: var(--color-success); }

.callout-warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--text-primary);
}
.callout-warning .callout-title { color: var(--color-warning); }

.callout-important {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--accent-secondary);
  color: var(--text-primary);
}
.callout-important .callout-title { color: var(--accent-secondary); }

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.feature-card {
  padding: 24px;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent-glow);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Code Snippets */
.code-block-wrapper {
  margin: 20px 0;
  border-radius: 10px;
  background: #0f1422;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.code-lang {
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  color: #fff;
  border-color: var(--accent-primary);
  background: var(--accent-glow);
}

pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: #e2e8f0;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--accent-primary);
}

pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

tr:hover td {
  background: var(--bg-secondary);
}

/* Architecture Diagram */
.arch-diagram {
  margin: 24px 0;
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.diagram-svg {
  max-width: 100%;
  height: auto;
}

/* Right TOC */
.toc-sidebar {
  width: var(--toc-width);
  position: fixed;
  top: var(--header-height);
  right: 0;
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 40px 20px;
  border-left: 1px solid var(--border-color);
}

.toc-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.toc-item {
  margin-bottom: 8px;
}

.toc-link {
  display: block;
  font-size: 0.825rem;
  color: var(--text-secondary);
  text-decoration: none;
  line-height: 1.4;
  transition: all 0.15s ease;
}

.toc-link:hover {
  color: var(--text-primary);
}

.toc-link.active {
  color: var(--accent-primary);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 1200px) {
  .toc-sidebar {
    display: none;
  }
  .main-wrapper {
    margin-right: 0;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
  }
  .main-wrapper {
    margin-left: 0;
    padding: 24px 20px 60px;
  }
  .hero-banner {
    padding: 28px 20px;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .header {
    padding: 0 16px;
  }
  .header-btn-text {
    display: none;
  }
}

.highlight-card {
  border: 1px solid rgba(99, 102, 241, 0.25);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.6) 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.3);
}

.highlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #6366f1, #10b981);
}

/* Beta Banner & Pulse */
.beta-badge-banner {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.35);
  border-radius: 9999px;
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 20px;
  box-shadow: 0 2px 12px rgba(14, 165, 233, 0.1);
}

.beta-badge-link {
  color: #38bdf8;
  text-decoration: none;
  font-weight: 700;
  margin-left: 6px;
  transition: all 0.2s;
}

.beta-badge-link:hover {
  text-decoration: underline;
  color: #7dd3fc;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 0 rgba(56, 189, 248, 0.7);
  animation: pulse 1.8s infinite;
  display: inline-block;
  flex-shrink: 0;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(56, 189, 248, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

.btn-tg {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #0284c7;
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 15px rgba(2, 132, 199, 0.3);
}

.btn-tg:hover {
  background: #0369a1;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.4);
}

/* Sidebar Community Card */
.sidebar-community-card {
  margin: 20px 16px 24px;
  padding: 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.community-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 6px;
}

.community-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.community-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 7px 10px;
  background: rgba(14, 165, 233, 0.2);
  border: 1px solid rgba(14, 165, 233, 0.45);
  border-radius: 6px;
  color: #38bdf8;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.community-btn:hover {
  background: #0284c7;
  color: #fff;
  border-color: #0284c7;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.3);
}