/* ============================================
   Claude Code Source Analysis - Dark Theme
   ============================================ */

:root {
  --bg-primary: #0c0c0c;
  --bg-secondary: #141414;
  --bg-card: #181818;
  --bg-card-hover: #1e1e1e;
  --bg-code: #161616;
  --border-default: #282828;
  --border-hover: #525252;
  --text-primary: #e0e0e0;
  --text-secondary: #8a8a8a;
  --text-muted: #5a5a5a;
  --accent-primary: #7eb8da;    /* muted steel blue */
  --accent-secondary: #8a9bb5;  /* slate */
  --accent-warm: #c9a87c;       /* warm sand */
  --accent-gold: #c9a84c;       /* muted gold */
  --accent-green: #6bab90;      /* sage */
  --accent-blue: #7eb8da;       /* steel */
  --accent-red: #c47070;        /* muted red */
  --accent-orange: #c49a6b;     /* muted amber */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-default);
  padding: 0 2rem;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-logo .logo-icon {
  width: 28px;
  height: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--accent-primary);
}
.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a.active {
  color: var(--accent-primary);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 1px;
}

.nav-github {
  color: var(--text-secondary);
  font-size: 1.2rem;
}
.nav-github:hover { color: var(--text-primary); }

/* ---- Hero ---- */
.hero {
  padding: 140px 2rem 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: none;
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-family: var(--font-mono);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}
.hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2rem;
  line-height: 1.8;
}

/* Stats bar */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-primary);
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
}

/* ---- Section ---- */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.section-header {
  margin-bottom: 3rem;
}
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}
.section-title {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 700px;
}

/* ---- Chapter Cards Grid ---- */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}
.chapter-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}
.chapter-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.chapter-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}
.chapter-card h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.chapter-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.chapter-icon {
  font-size: 1.2rem;
}

/* ---- Architecture Diagram ---- */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin: 2rem 0;
  overflow-x: auto;
}
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  min-width: 600px;
}
.arch-box {
  background: var(--bg-code);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  min-width: 120px;
  transition: all var(--transition);
}
.arch-box:hover {
  border-color: var(--accent-primary);
  background: rgba(126,184,218,0.05);
}
.arch-box .box-label {
  color: var(--text-muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}
.arch-box .box-name {
  color: var(--text-primary);
  font-weight: 600;
}
.arch-box .box-file {
  color: var(--text-muted);
  font-size: 0.65rem;
  margin-top: 0.25rem;
}
.arch-arrow {
  color: var(--accent-primary);
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* ---- Tool Table ---- */
.tool-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}
.tool-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.tool-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--border-default);
  position: sticky;
  top: 0;
}
.tool-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(42,42,58,0.5);
  vertical-align: top;
}
.tool-table tr:hover td {
  background: rgba(126,184,218,0.03);
}
.tool-name {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-primary);
  font-size: 0.85rem;
  white-space: nowrap;
}
.tool-category {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: rgba(126,184,218,0.1);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  white-space: nowrap;
}
.tool-category.cat-file { background: rgba(126,184,218,0.1); color: var(--accent-blue); }
.tool-category.cat-search { background: rgba(107,171,144,0.1); color: var(--accent-green); }
.tool-category.cat-shell { background: rgba(196,112,112,0.1); color: var(--accent-red); }
.tool-category.cat-web { background: rgba(201,168,76,0.1); color: var(--accent-gold); }
.tool-category.cat-agent { background: rgba(126,184,218,0.1); color: var(--accent-primary); }
.tool-category.cat-task { background: rgba(138,155,181,0.1); color: var(--accent-secondary); }
.tool-category.cat-mcp { background: rgba(201,168,124,0.1); color: var(--accent-warm); }
.tool-category.cat-config { background: rgba(196,154,107,0.1); color: var(--accent-orange); }

/* ---- Content Page ---- */
.page-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 2rem 4rem;
}
.page-content h1 {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.page-content h2 {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--accent-primary);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-default);
}
.page-content h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.page-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}
.page-content ul, .page-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.page-content li {
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}
.page-content li strong {
  color: var(--text-primary);
}

/* Code blocks */
pre.code-block,
div.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin: 1rem 0 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre !important;
  word-wrap: normal;
  tab-size: 2;
  -moz-tab-size: 2;
}
.code-block .comment { color: var(--text-muted); }
.code-block .keyword { color: var(--accent-primary); }
.code-block .string { color: var(--accent-green); }
.code-block .type { color: var(--accent-gold); }
.code-block .fn { color: var(--accent-blue); }

/* Info box */
.info-box {
  background: rgba(126,184,218,0.05);
  border-left: 3px solid var(--accent-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.info-box.warning {
  background: rgba(251,191,36,0.05);
  border-left-color: var(--accent-gold);
}
.info-box strong {
  color: var(--text-primary);
}

/* Flow diagram */
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 1.5rem 0;
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  position: relative;
  padding: 1rem 0;
}
.flow-step::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 40px;
  bottom: -10px;
  width: 2px;
  background: var(--border-default);
}
.flow-step:last-child::before { display: none; }
.flow-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-code);
  border: 2px solid var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-primary);
  flex-shrink: 0;
  z-index: 1;
}
.flow-content h4 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.flow-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Permission mode badges */
.perm-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}
.perm-default { background: rgba(96,165,250,0.15); color: var(--accent-blue); }
.perm-plan { background: rgba(126,184,218,0.12); color: var(--accent-primary); }
.perm-accept { background: rgba(52,211,153,0.15); color: var(--accent-green); }
.perm-bypass { background: rgba(248,113,113,0.15); color: var(--accent-red); }
.perm-auto { background: rgba(251,191,36,0.15); color: var(--accent-gold); }

/* ---- Sidebar (for content pages) ---- */
.page-with-sidebar {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 80px;
}
.sidebar {
  width: 260px;
  flex-shrink: 0;
  padding: 1.5rem 1rem;
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  overflow-y: auto;
  border-right: 1px solid var(--border-default);
}
.sidebar-section {
  margin-bottom: 1.5rem;
}
.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
  padding: 0 0.75rem;
}
.sidebar-link {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: all var(--transition);
}
.sidebar-link:hover {
  color: var(--text-primary);
  background: rgba(126,184,218,0.05);
}
.sidebar-link.active {
  color: var(--accent-primary);
  background: rgba(126,184,218,0.1);
}
.page-main {
  flex: 1;
  min-width: 0;
  padding: 2rem 3rem 4rem;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border-default);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer a { color: var(--text-secondary); }

/* ---- Animations ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.5s ease-out forwards;
  opacity: 0;
}
.animate-in:nth-child(1) { animation-delay: 0.05s; }
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.15s; }
.animate-in:nth-child(4) { animation-delay: 0.2s; }
.animate-in:nth-child(5) { animation-delay: 0.25s; }
.animate-in:nth-child(6) { animation-delay: 0.3s; }
.animate-in:nth-child(7) { animation-delay: 0.35s; }
.animate-in:nth-child(8) { animation-delay: 0.4s; }
.animate-in:nth-child(9) { animation-delay: 0.45s; }
.animate-in:nth-child(10) { animation-delay: 0.5s; }
.animate-in:nth-child(11) { animation-delay: 0.55s; }
.animate-in:nth-child(12) { animation-delay: 0.6s; }
.animate-in:nth-child(13) { animation-delay: 0.65s; }
.animate-in:nth-child(14) { animation-delay: 0.7s; }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { padding: 120px 1rem 50px; }
  .hero h1 { font-size: 1.6rem; }
  .hero p { font-size: 0.95rem; }
  .stats-bar { gap: 1rem; }
  .stat-value { font-size: 1.3rem; }
  .stat-label { font-size: 0.65rem; }
  .chapters-grid { grid-template-columns: 1fr; }
  .section { padding: 2rem 1rem; }
  .section-title { font-size: 1.4rem; }
  .page-with-sidebar { flex-direction: column; }
  .sidebar {
    width: 100%;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-default);
    padding: 1rem 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
  }
  .sidebar-section { width: 100%; margin-bottom: 0.5rem; }
  .sidebar-link { display: inline-block; padding: 0.3rem 0.6rem; font-size: 0.75rem; }
  .page-main { padding: 1.25rem 1rem 3rem; }
  .page-content h1 { font-size: 1.5rem; }
  .page-content h2 { font-size: 1.15rem; }
  .arch-flow { min-width: auto; flex-direction: column; }
  .arch-arrow { transform: rotate(90deg); }
  .arch-box { min-width: auto; padding: 0.75rem 1rem; }
  .code-block { padding: 0.75rem; font-size: 0.72rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tool-table { font-size: 0.75rem; }
  .tool-table th, .tool-table td { padding: 0.5rem 0.6rem; }
  .flow-step { gap: 0.75rem; }
  .flow-num { width: 28px; height: 28px; font-size: 0.65rem; }
  .flow-content h4 { font-size: 0.85rem; }
  .info-box { padding: 0.75rem 1rem; font-size: 0.8rem; }
  .chapter-card { padding: 1.25rem; }
  .chapter-card h3 { font-size: 0.95rem; }
  .chapter-card p { font-size: 0.8rem; }
  .tree-desc { display: none; }
  .tree-badge { font-size: 0.55rem; }
  .file-tree ul ul { padding-left: 0.75rem; }
}

@media (max-width: 480px) {
  .hero { padding: 100px 0.75rem 40px; }
  .hero h1 { font-size: 1.3rem; }
  .stats-bar { gap: 0.75rem; flex-wrap: wrap; justify-content: center; }
  .stat-item { min-width: 60px; }
  .nav-inner { padding: 0 0.75rem; }
  .nav-logo { font-size: 0.9rem; }
  .section { padding: 1.5rem 0.75rem; }
  .page-main { padding: 1rem 0.75rem 2rem; }
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 1.5rem;
}
.tab-btn {
  padding: 0.6rem 1.2rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---- Search ---- */
.search-box {
  position: relative;
  margin-bottom: 1.5rem;
}
.search-input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--accent-primary); }
.search-input::placeholder { color: var(--text-muted); }
.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---- File Tree (interactive) ---- */
.file-tree {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1;
  color: var(--text-secondary);
  padding: 0.5rem 0;
}
.file-tree ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.file-tree ul ul {
  padding-left: 1.25rem;
  border-left: 1px solid var(--border-default);
  margin-left: 0.5rem;
}
.file-tree li {
  margin: 0;
  padding: 0;
}
.tree-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  border-radius: 6px;
  transition: background var(--transition);
  cursor: default;
}
.tree-item:hover {
  background: rgba(126,184,218,0.05);
}
.tree-icon {
  font-size: 0.9rem;
  flex-shrink: 0;
  width: 1.2rem;
  text-align: center;
}
.tree-name {
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}
.tree-name.is-dir { color: var(--accent-blue); }
.tree-name.is-file { color: var(--text-secondary); font-weight: 400; }
.tree-desc {
  color: var(--text-muted);
  font-size: 0.72rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-badge {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.6rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}
.tree-badge.hot { background: rgba(248,113,113,0.15); color: var(--accent-red); }
.tree-badge.core { background: rgba(126,184,218,0.12); color: var(--accent-primary); }
.tree-badge.new { background: rgba(52,211,153,0.15); color: var(--accent-green); }
.tree-toggle {
  cursor: pointer;
  user-select: none;
}
.tree-toggle .tree-icon { transition: transform 0.2s ease; }
.tree-toggle[aria-expanded="false"] .tree-icon { transform: rotate(-90deg); }
.tree-toggle[aria-expanded="false"] + ul { display: none; }

/* Legacy tree (keep for backward compat) */
.tree {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text-secondary);
  padding: 1rem 0;
}
.tree .dir { color: var(--accent-blue); font-weight: 600; }
.tree .file { color: var(--text-secondary); }
.tree .desc { color: var(--text-muted); font-size: 0.75rem; }