:root {
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #162032;
  --border-color: #1f293d;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;

  --ansi-black: #1e293b;
  --ansi-red: #ef4444;
  --ansi-green: #10b981;
  --ansi-yellow: #f59e0b;
  --ansi-blue: #3b82f6;
  --ansi-magenta: #a855f7;
  --ansi-cyan: #06b6d4;
  --ansi-white: #f8fafc;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #0284c7;
  --accent-hover: #0369a1;

  --ansi-black: #e2e8f0;
  --ansi-white: #0f172a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 1.5rem; }

/* Navbar */
.navbar {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
}
.brand-icon { width: 32px; height: 32px; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-link { color: var(--text-secondary); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.nav-link:hover { color: var(--accent); }
.btn-icon {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 8px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-icon:hover { color: var(--text-primary); border-color: var(--accent); }

/* Hero */
.hero { padding: 4rem 0 1.5rem; text-align: center; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 9999px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-mono);
  margin-bottom: 1.5rem;
}
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 1rem; }
.gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #a855f7 50%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

/* Code Snippet Box */
.code-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}
.code-header {
  padding: 0.6rem 1rem;
  background: var(--bg-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
}
.copy-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.code-content {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  overflow-x: auto;
  white-space: pre;
  color: #38bdf8;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 3.5rem auto 5rem;
}
@media (min-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s;
}
.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  flex-grow: 1;
}
/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   Documentation Layout & Sidebar
   ========================================================================== */
.docs-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2.5rem 1.5rem;
  max-width: 1200px;
}

@media (min-width: 992px) {
  .docs-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem;
  }
  .docs-sidebar {
    position: sticky;
    top: 5rem;
    height: calc(100vh - 6rem);
    overflow-y: auto;
    padding-right: 1rem;
  }
}

.docs-sidebar { display: none; }
@media (min-width: 992px) {
  .docs-sidebar { display: block; }
}

.docs-nav-group { margin-bottom: 1.75rem; }
.docs-nav-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}
.docs-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.docs-nav-link {
  display: block;
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}
.docs-nav-link:hover {
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.08);
}
.docs-nav-link.active {
  color: var(--accent);
  background: rgba(56, 189, 248, 0.12);
  font-weight: 600;
}

/* Mobile TOC Bar */
.docs-mobile-toc-bar {
  display: block;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 0.6rem 0;
  position: sticky;
  top: 4rem;
  z-index: 90;
}
@media (min-width: 992px) {
  .docs-mobile-toc-bar { display: none; }
}
.docs-mobile-toc-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.25rem 0;
}
.docs-mobile-toc-drawer {
  display: none;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}
.docs-mobile-toc-drawer.open { display: block; }

/* Documentation Content Sections */
.docs-content { min-width: 0; }
.docs-section {
  margin-bottom: 3.5rem;
  scroll-margin-top: 5.5rem;
}
.docs-section h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.docs-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2.25rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}
.docs-section h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}
.docs-section p {
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
  line-height: 1.65;
  font-size: 0.98rem;
}

/* Documentation Tables */
.docs-table-wrapper {
  overflow-x: auto;
  margin: 1.25rem 0 1.75rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-card);
}
.docs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}
.docs-table th {
  background: var(--bg-secondary);
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.docs-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.5;
}
.docs-table tr:last-child td { border-bottom: none; }
.docs-table code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  white-space: nowrap;
}

/* Segment Directory, Search & Filter */
.segment-controls {
  margin-bottom: 1.5rem;
}
.segment-search-box {
  position: relative;
  margin-bottom: 1rem;
}
.segment-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
.segment-search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  transition: border-color 0.2s;
}
.segment-search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}
.segment-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.filter-chip {
  padding: 0.35rem 0.8rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-chip:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}
.filter-chip.active {
  background: var(--accent);
  color: #0b0f19;
  font-weight: 600;
  border-color: var(--accent);
}

/* Segments Card Grid */
.segments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.1rem;
}
.segment-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.segment-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 24px -10px rgba(0, 0, 0, 0.5);
}
.segment-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}
.segment-card-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}
.segment-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.badge-vcs { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.badge-system { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.badge-cloud { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.badge-lang { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.badge-env { background: rgba(6, 182, 212, 0.15); color: #06b6d4; }

.segment-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0.75rem;
  flex-grow: 1;
}
.segment-card-flags {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  word-break: break-all;
  border: 1px solid rgba(255, 255, 255, 0.03);
}