:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f4f4f5;
  --line: #e4e4e7;
  --text: #18181b;
  --muted: #52525b;
  --accent: #2563eb;
  --solid-bg: #18181b;
  --solid-fg: #ffffff;
  --radius: 12px;
  --content-width: 980px;
  --nav-width: 1360px;
}

html[data-theme="dark"] {
  --bg: #09090b;
  --surface: #111113;
  --surface-soft: #18181b;
  --line: #27272a;
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --accent: #60a5fa;
  --solid-bg: #f4f4f5;
  --solid-fg: #09090b;
}

html[data-theme="dark"] .nav-links a {
  color: #d4d4d8;
}

html[data-theme="dark"] .nav-links a:hover,
html[data-theme="dark"] .nav-links a.active {
  color: #fafafa;
}

html[data-theme="dark"] .site-header .icon-btn {
  background: #18181b;
  border-color: #3f3f46;
  color: #f4f4f5;
}

html[data-theme="dark"] .site-header .icon-btn:hover {
  background: #27272a;
  border-color: #52525b;
  color: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  border-bottom: 1px solid var(--line);
}

.site-nav {
  max-width: var(--nav-width);
  margin: 0 auto;
  padding: 0 0 0 0.35rem;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.brand {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  margin-right: 0.4rem;
}

.brand-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--muted);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 1;
}

.nav-links {
  display: flex;
  gap: 0.28rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}

.nav-links a {
  text-decoration: none;
  padding: 0.56rem 0.72rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface-soft);
  color: var(--text);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  position: relative;
  margin-left: auto;
  margin-right: 0.1rem;
}

.topnav-toggle {
  display: none;
}

.topnav-toggle[hidden] {
  display: none !important;
}

.topnav-toggle [data-topnav-toggle-text] {
  display: inline-block;
  font-size: 1.5em;
  line-height: 1;
}

.site-nav.has-overflow-links .topnav-toggle {
  display: inline-flex;
}

.nav-links a.is-overflow-hidden {
  display: none !important;
}

.topnav-overflow-panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 120;
  min-width: 180px;
  max-width: min(72vw, 300px);
  padding: 0.4rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 12px 26px color-mix(in srgb, #000 16%, transparent);
  gap: 0.35rem;
  flex-direction: column;
}

.site-nav.has-overflow-links.overflow-expanded .topnav-overflow-panel {
  display: flex;
}

.topnav-overflow-link {
  text-decoration: none;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.03em;
  background: var(--surface);
  white-space: nowrap;
}

.topnav-overflow-link:hover,
.topnav-overflow-link.active {
  background: var(--surface-soft);
  color: var(--text);
}

.icon-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 0.5rem 0.72rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.icon-btn:hover {
  color: var(--text);
  background: var(--surface-soft);
}

.page-shell {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3.2rem;
}

.hero-block {
  padding: 2rem 0 1.5rem;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.hero-title {
  margin: 0.9rem 0 0.7rem;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-title .accent {
  color: var(--accent);
}

.hero-subtitle {
  max-width: 72ch;
  color: var(--muted);
  line-height: 1.85;
  font-size: 1rem;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.button,
.button-secondary {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72rem 0.95rem;
  border-radius: 999px;
  font-weight: 600;
  transition: background 0.2s ease;
}

.button {
  background: var(--solid-bg);
  color: var(--solid-fg);
}

.button-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
}

.button:hover,
.button-secondary:hover {
  background: var(--surface-soft);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 1.2rem;
  align-items: start;
}

.card,
.panel,
.post-card,
.contact-card,
.project-card,
.detail-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel,
.detail-panel,
.contact-card {
  padding: 1.2rem;
}

.section {
  margin-top: 1.2rem;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-header h2,
.section-header h3 {
  margin: 0;
  font-size: 1.12rem;
}

.section-header p {
  margin: 0;
  color: var(--muted);
}

.post-list,
.project-grid,
.contact-grid,
.stats-grid,
.resource-grid {
  display: grid;
  gap: 1rem;
}

.post-list {
  grid-template-columns: 1fr;
}

.post-card,
.project-card {
  padding: 1.2rem;
}

.post-card h3,
.project-card h3,
.detail-panel h3,
.contact-card h3 {
  margin: 0 0 0.45rem;
}

.post-card p,
.project-card p,
.detail-panel p,
.contact-card p,
.panel p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.post-meta,
.project-meta,
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.8rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 700;
}

.post-card button {
  border: 0;
  background: none;
  width: 100%;
  text-align: left;
  color: inherit;
  cursor: pointer;
  padding: 0;
}

.post-card.is-active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}

.sidebar-stack {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 92px;
}

.stats-grid,
.resource-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-item,
.resource-item {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.stat-item strong {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 0.2rem;
}

.mini-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.mini-list li {
  padding-left: 1rem;
  position: relative;
  color: var(--muted);
  line-height: 1.7;
}

.mini-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  left: 0;
  top: 0.72rem;
}

.toolbar {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}

.search-input {
  flex: 1 1 240px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.85rem 1rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.7rem 0.95rem;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.filter-chip.is-active {
  background: var(--solid-bg);
  color: var(--solid-fg);
}

.knowledge-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.62fr) minmax(0, 1.38fr);
  gap: 1rem;
  align-items: start;
}

body[data-page="knowledge"] .page-shell {
  max-width: none;
}

body[data-page="library"] .page-shell {
  max-width: none;
}

body[data-page="projects"] .page-shell {
  max-width: none;
}

.knowledge-page-shell {
  position: relative;
  padding: 0 0 3rem;
  min-height: calc(100vh - 68px);
}

.knowledge-left-rail {
  position: fixed;
  top: 68px;
  left: 0;
  bottom: 0;
  width: 300px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  z-index: 60;
  padding: 1rem 0.95rem 1.2rem;
  overflow: auto;
  transition: width 0.2s ease, transform 0.2s ease;
}

.rail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
}

.rail-header h3 {
  margin: 0;
  font-size: 1rem;
}

.rail-toggle {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
  color: var(--muted);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.rail-toggle-text {
  line-height: 1;
  letter-spacing: -0.08em;
}

.rail-intro {
  margin: 0.7rem 0 0.95rem;
  line-height: 1.65;
  font-size: 0.88rem;
}

.domain-tree {
  display: grid;
  gap: 0.6rem;
}

.domain-group {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.domain-toggle {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-weight: 700;
  text-align: left;
  padding: 0.72rem 0.78rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.domain-toggle i {
  color: var(--muted);
  transition: transform 0.2s ease;
}

.domain-group.is-open .domain-toggle i {
  transform: rotate(0deg);
}

.domain-group:not(.is-open) .domain-toggle i {
  transform: rotate(-90deg);
}

.domain-children {
  list-style: none;
  margin: 0;
  padding: 0 0.45rem 0.55rem;
  display: grid;
  gap: 0.25rem;
}

.domain-children.domain-subgrid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.domain-subitem {
  width: 100%;
  text-align: center;
  font-size: 0.82rem;
  padding: 0.46rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
}

.domain-subitem:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.domain-group:not(.is-open) .domain-children {
  display: none;
}

.domain-link {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  color: var(--muted);
  border-radius: 10px;
  padding: 0.5rem 0.62rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
}

.domain-link:hover {
  background: var(--surface-soft);
  color: var(--text);
}

.domain-link.is-active {
  background: var(--solid-bg);
  color: var(--solid-fg);
}

.knowledge-main-area {
  margin-left: 300px;
  padding: 0 1.25rem;
}

.knowledge-main-area .hero-block,
.knowledge-main-area .knowledge-main {
  max-width: 1180px;
  margin: 0 auto;
}

/* Library + Book pages */
.library-page-shell {
  position: relative;
  padding: calc(var(--nav-height) + 2rem) 0 3rem;
  min-height: calc(100vh - 68px);
}

.library-left-rail {
  position: fixed;
  top: 68px;
  left: 0;
  bottom: 0;
  width: 300px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  z-index: 60;
  padding: 1rem 0.95rem 1.2rem;
  overflow: auto;
  transition: width 0.2s ease, transform 0.2s ease;
}

.library-main-area {
  margin-left: 300px;
  padding: 0 1.25rem;
}

.library-main-area .hero-block,
.library-main-area .library-toolbar,
.library-main-area .library-layout {
  max-width: none;
  margin: 0;
}

.library-left-rail .rail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
}

.library-left-rail .rail-header h3 {
  margin: 0;
  font-size: 1rem;
}

.library-left-rail .rail-intro {
  margin: 0.7rem 0 0.95rem;
  line-height: 1.65;
  font-size: 0.88rem;
}

.library-domain-tree {
  display: grid;
  gap: 0.6rem;
}

.library-all-link {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 0.72rem 0.78rem;
  font-weight: 700;
}

.library-all-link:hover {
  background: var(--surface-soft);
}

.library-toolbar {
  margin-bottom: 1rem;
}

.library-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: 1rem;
  align-items: start;
}

.library-center,
.library-right,
.book-tree-panel {
  padding: 1rem;
}

.library-table-wrap {
  overflow: auto;
}

.library-table {
  width: 100%;
  border-collapse: collapse;
}

.library-table th,
.library-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.75rem 0.6rem;
  text-align: left;
}

.library-table th {
  color: var(--muted);
  font-size: 0.86rem;
  letter-spacing: 0.03em;
}

.library-row {
  cursor: pointer;
  transition: background 0.15s ease;
}

.library-row:hover,
.library-row:focus {
  background: var(--surface-soft);
  outline: none;
}

.library-sidebar-backdrop {
  display: none;
}

.project-page-shell {
  position: relative;
  padding: calc(var(--nav-height) + 2rem) 0 3rem;
  min-height: calc(100vh - 68px);
}

.project-left-rail {
  position: fixed;
  top: 68px;
  left: 0;
  bottom: 0;
  width: 300px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  z-index: 60;
  padding: 1rem 0.95rem 1.2rem;
  overflow: auto;
  transition: width 0.2s ease, transform 0.2s ease;
}

.project-main-area {
  margin-left: 300px;
  padding: 0 1.25rem;
}

.project-main-area .hero-block,
.project-main-area .project-toolbar,
.project-main-area .section {
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

.project-toolbar {
  margin-bottom: 1rem;
}

.project-sidebar-backdrop {
  display: none;
}

body.library-sidebar-collapsed .library-left-rail {
  width: 0;
  padding: 0;
  border-right: 0;
  background: transparent;
  overflow: visible;
}

body.library-sidebar-collapsed .library-main-area {
  margin-left: 24px;
}

body.library-sidebar-collapsed .library-left-rail .rail-header h3,
body.library-sidebar-collapsed .library-left-rail .rail-intro,
body.library-sidebar-collapsed .library-left-rail .domain-toggle-label,
body.library-sidebar-collapsed .library-left-rail .domain-children,
body.library-sidebar-collapsed .library-left-rail .library-all-link {
  display: none;
}

body.library-sidebar-collapsed .library-left-rail .rail-header {
  position: relative;
  display: block;
  width: 0;
  height: 0;
}

body.library-sidebar-collapsed .library-left-rail .rail-toggle {
  position: absolute;
  top: 12px;
  left: 10px;
  background: var(--surface);
  box-shadow: 0 10px 30px color-mix(in srgb, #000 10%, transparent);
}

body.library-sidebar-collapsed .library-left-rail .domain-tree,
body.library-sidebar-collapsed .library-left-rail .domain-group {
  display: none;
}

body.project-sidebar-collapsed .project-left-rail {
  width: 0;
  padding: 0;
  border-right: 0;
  background: transparent;
  overflow: visible;
}

body.project-sidebar-collapsed .project-main-area {
  margin-left: 24px;
}

body.project-sidebar-collapsed .project-left-rail .rail-header h3,
body.project-sidebar-collapsed .project-left-rail .rail-intro,
body.project-sidebar-collapsed .project-left-rail .domain-toggle-label,
body.project-sidebar-collapsed .project-left-rail .domain-children,
body.project-sidebar-collapsed .project-left-rail .domain-link[data-project-filter="all"] {
  display: none;
}

body.project-sidebar-collapsed .project-left-rail .rail-header {
  position: relative;
  display: block;
  width: 0;
  height: 0;
}

body.project-sidebar-collapsed .project-left-rail .rail-toggle {
  position: absolute;
  top: 12px;
  left: 10px;
  background: var(--surface);
  box-shadow: 0 10px 30px color-mix(in srgb, #000 10%, transparent);
}

body.project-sidebar-collapsed .project-left-rail .domain-tree,
body.project-sidebar-collapsed .project-left-rail .domain-group {
  display: none;
}

.book-tree {
  margin: 0;
  padding-left: 0;
  display: grid;
  gap: 0.35rem;
  list-style: none;
}

.book-tree ul {
  margin: 0.35rem 0 0.35rem 1rem;
  padding-left: 0.4rem;
  list-style: none;
  display: grid;
  gap: 0.3rem;
}

.book-tree li,
.book-tree li::marker {
  list-style: none;
  content: '';
}

.book-tree ul.book-tree-children {
  display: none;
}

.book-tree ul.book-tree-children.is-open {
  display: grid;
}

.book-tree-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.book-tree-toggle {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  width: 1.1rem;
  padding: 0;
}

.book-tree-label {
  border: 0;
  background: transparent;
  font: inherit;
  text-align: left;
  padding: 0;
  cursor: pointer;
  color: var(--text);
}

/* Graph workspace */
body[data-page="graph"] .page-shell {
  max-width: none;
}

.graph-page-shell {
  padding-top: 1rem;
}

.graph-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 2fr) minmax(300px, 1fr);
  gap: 1rem;
  align-items: start;
}

.graph-controls,
.graph-canvas,
.graph-detail,
.graph-legend {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.graph-controls,
.graph-detail,
.graph-legend {
  padding: 1rem;
}

.graph-controls {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 108px);
  overflow: auto;
}

.graph-controls h2,
.graph-detail h2 {
  margin: 0 0 0.8rem;
  font-size: 1.1rem;
}

.graph-controls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.graph-controls-header h2 {
  margin: 0;
}

.graph-settings-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  line-height: 1;
}

.graph-settings-backdrop {
  position: fixed;
  inset: 68px 0 0;
  background: color-mix(in srgb, #000 36%, transparent);
  z-index: 130;
  pointer-events: none;
}

.graph-settings-backdrop[hidden] {
  display: none;
}

.graph-settings-drawer {
  position: fixed;
  top: 84px;
  left: calc(100vw - 376px);
  width: min(360px, calc(100vw - 24px));
  max-height: calc(100vh - 100px);
  overflow: auto;
  z-index: 140;
  box-shadow: 0 18px 44px color-mix(in srgb, #000 24%, transparent);
}

.graph-settings-drawer[hidden] {
  display: none;
}

.graph-settings-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
  cursor: move;
  user-select: none;
}

.graph-settings-drawer-header h3 {
  margin: 0;
  font-size: 1rem;
}

.graph-settings-close {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  cursor: pointer;
}

body.graph-settings-dragging,
body.graph-settings-dragging * {
  cursor: move !important;
}

.graph-control-block {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.graph-control-block label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--muted);
}

.graph-range-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.graph-range-row input[type="range"] {
  width: 100%;
  flex: 1 1 auto;
  min-width: 0;
}

.graph-tuning-number {
  width: 82px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  padding: 0.32rem 0.4rem;
  font: inherit;
  font-size: 0.82rem;
}

.graph-chip-group {
  gap: 0.45rem;
}

.graph-tuning-grid {
  display: grid;
  gap: 0.55rem;
}

.graph-tuning-item {
  display: grid;
  gap: 0.35rem;
}

.graph-tuning-item > span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.graph-tuning-actions {
  margin-top: 0.45rem;
}

.graph-tuning-actions .filter-chip {
  padding: 0.45rem 0.72rem;
  font-size: 0.82rem;
}

.graph-mode-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.graph-mode-switch .filter-chip {
  padding: 0.5rem 0.8rem;
}

.graph-chip-group .filter-chip {
  padding: 0.45rem 0.7rem;
  font-size: 0.82rem;
}

.graph-edge-filter {
  display: grid;
  gap: 0.45rem;
}

.graph-edge-option {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.87rem;
  color: var(--muted);
}

.graph-edge-option input {
  accent-color: var(--accent);
}

.graph-query-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.graph-query-results {
  margin-top: 0.7rem;
  max-height: 200px;
  overflow: auto;
}

.graph-query-node {
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.graph-canvas-wrap {
  display: grid;
  gap: 0.8rem;
}

.graph-canvas {
  height: 68vh;
  min-height: 420px;
  padding: 0.5rem;
  background:
    radial-gradient(120% 90% at 10% 8%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 62%),
    linear-gradient(180deg, color-mix(in srgb, var(--surface-soft) 72%, var(--surface)) 0%, var(--surface) 100%);
}

html[data-theme="dark"] .graph-canvas {
  background:
    radial-gradient(120% 90% at 10% 8%, rgba(96, 165, 250, 0.14), transparent 62%),
    linear-gradient(180deg, #0b1220 0%, #09090b 100%);
}

.graph-legend h3 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
}

.graph-legend-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.legend-section {
  display: grid;
  gap: 0.45rem;
}

.legend-glyph {
  display: inline-block;
  min-width: 1.4rem;
  text-align: center;
  font-weight: 700;
  color: var(--text);
  margin-right: 0.2rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  margin-right: 0.35rem;
}

.legend-dot.concept { background: var(--accent); }
.legend-dot.skill { background: #8b5cf6; }
.legend-dot.source { background: #f59e0b; }
.legend-dot.project { background: #14b8a6; }

.graph-detail {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 108px);
  overflow: auto;
}

.knowledge-sidebar-backdrop {
  display: none;
}

.sidebar-open-btn {
  display: none;
}

body.knowledge-sidebar-collapsed .knowledge-left-rail {
  width: 0;
  padding: 0;
  border-right: 0;
  background: transparent;
  overflow: visible;
}

body.knowledge-sidebar-collapsed .knowledge-main-area {
  margin-left: 24px;
}

body.knowledge-sidebar-collapsed .rail-header h3,
body.knowledge-sidebar-collapsed .rail-intro,
body.knowledge-sidebar-collapsed .domain-toggle-label,
body.knowledge-sidebar-collapsed .domain-children {
  display: none;
}

body.knowledge-sidebar-collapsed .rail-header {
  position: relative;
  display: block;
  width: 0;
  height: 0;
}

body.knowledge-sidebar-collapsed .rail-toggle {
  position: absolute;
  top: 12px;
  left: 10px;
  background: var(--surface);
  box-shadow: 0 10px 30px color-mix(in srgb, #000 10%, transparent);
}

body.knowledge-sidebar-collapsed .domain-toggle {
  justify-content: center;
}

body.knowledge-sidebar-collapsed .domain-tree,
body.knowledge-sidebar-collapsed .domain-group {
  display: none;
}

.knowledge-sidebar {
  position: sticky;
  top: 92px;
}

.knowledge-sidebar h3 {
  margin: 0 0 0.55rem;
}

.taxonomy-list {
  margin-top: 0.85rem;
  gap: 0.8rem;
}

.taxonomy-list li {
  display: grid;
  gap: 0.18rem;
}

.taxonomy-list li strong {
  color: var(--text);
  font-size: 0.95rem;
}

.taxonomy-list li span {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.knowledge-main {
  display: grid;
  gap: 1rem;
}

.knowledge-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.94fr);
  gap: 1rem;
  align-items: start;
}

.detail-panel {
  position: sticky;
  top: 92px;
}

.detail-panel .detail-section {
  margin-top: 1rem;
}

.detail-panel .detail-section h4 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.link-list a {
  color: var(--accent);
  text-decoration: none;
}

.hero-note {
  margin-top: 1rem;
  padding: 1rem 1.05rem;
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--muted);
}

.project-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card .project-link,
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.9rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.contact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contact-simple {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.contact-icons {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.6rem 0;
}

.contact-icon-link {
  width: 52px;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.contact-icon-link:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: var(--surface-soft);
}

.contact-icon-img {
  width: 26px;
  height: 26px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.contact-simple li {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.contact-simple li:last-child {
  border-bottom: 0;
}

.site-brand-icon {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
}

.contact-label {
  min-width: 88px;
  color: var(--muted);
  font-weight: 600;
}

.contact-value a {
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}

.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.taxonomy-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 0.95rem 1rem;
}

.taxonomy-card h3 {
  margin: 0;
  font-size: 1rem;
}

.taxonomy-card p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.collection-list {
  display: grid;
  gap: 0.85rem;
}

.collection-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 0.95rem 1rem;
}

.collection-item h4 {
  margin: 0 0 0.4rem;
  font-size: 0.98rem;
}

.collection-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.55rem;
}

.collection-links a {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem 0.66rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.collection-links a:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.footer {
  margin-top: 3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.loading-state,
.empty-state {
  padding: 1.2rem;
  text-align: center;
  color: var(--muted);
}

.vis-tooltip {
  max-width: 420px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 12px 32px color-mix(in srgb, #000 16%, transparent);
}

.graph-tooltip-card {
  max-width: 390px;
  line-height: 1.5;
}

.graph-tooltip-title {
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.graph-tooltip-summary {
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.graph-tooltip-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.graph-tooltip-subtitle {
  font-weight: 600;
  margin-top: 0.2rem;
}

.graph-tooltip-list {
  margin: 0.35rem 0 0;
  padding: 0 0 0 1rem;
  display: grid;
  gap: 0.25rem;
}

.muted {
  color: var(--muted);
}

.note-inline {
  display: inline-block;
  margin-top: 0.6rem;
  color: var(--accent);
  background: var(--surface-soft);
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

code {
  background: var(--surface-soft);
  padding: 0.15rem 0.4rem;
  border-radius: 0.35rem;
  border: 1px solid var(--line);
  font-size: 0.9em;
}

@media (max-width: 960px) {
  .content-grid,
  .knowledge-layout,
  .knowledge-content-grid,
  .library-layout,
  .graph-layout,
  .contact-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .sidebar-stack,
  .knowledge-sidebar,
  .graph-controls,
  .graph-detail,
  .detail-panel {
    position: static;
  }

  .knowledge-left-rail,
  .library-left-rail,
  .project-left-rail {
    top: 68px;
    width: min(86vw, 320px);
    transform: translateX(-102%);
    box-shadow: 0 0 0 transparent;
  }

  body.knowledge-sidebar-open .knowledge-left-rail {
    transform: translateX(0);
    box-shadow: 8px 0 32px color-mix(in srgb, #000 24%, transparent);
  }

  body.library-sidebar-open .library-left-rail {
    transform: translateX(0);
    box-shadow: 8px 0 32px color-mix(in srgb, #000 24%, transparent);
  }

  body.project-sidebar-open .project-left-rail {
    transform: translateX(0);
    box-shadow: 8px 0 32px color-mix(in srgb, #000 24%, transparent);
  }

  .knowledge-main-area,
  body.knowledge-sidebar-collapsed .knowledge-main-area,
  .library-main-area,
  body.library-sidebar-collapsed .library-main-area,
  .project-main-area,
  body.project-sidebar-collapsed .project-main-area {
    margin-left: 0;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  body.knowledge-sidebar-collapsed .knowledge-left-rail {
    width: min(86vw, 320px);
    padding: 1rem 0.95rem 1.2rem;
    border-right: 1px solid var(--line);
    background: var(--surface);
    overflow: auto;
  }

  body.library-sidebar-collapsed .library-left-rail {
    width: min(86vw, 320px);
    padding: 1rem 0.95rem 1.2rem;
    border-right: 1px solid var(--line);
    background: var(--surface);
    overflow: auto;
  }

  body.project-sidebar-collapsed .project-left-rail {
    width: min(86vw, 320px);
    padding: 1rem 0.95rem 1.2rem;
    border-right: 1px solid var(--line);
    background: var(--surface);
    overflow: auto;
  }

  body.knowledge-sidebar-collapsed .rail-header h3,
  body.knowledge-sidebar-collapsed .rail-intro,
  body.knowledge-sidebar-collapsed .domain-toggle-label,
  body.knowledge-sidebar-collapsed .domain-children {
    display: initial;
  }

  body.library-sidebar-collapsed .library-left-rail .rail-header h3,
  body.library-sidebar-collapsed .library-left-rail .rail-intro,
  body.library-sidebar-collapsed .library-left-rail .domain-toggle-label,
  body.library-sidebar-collapsed .library-left-rail .domain-children,
  body.library-sidebar-collapsed .library-left-rail .library-all-link {
    display: initial;
  }

  body.project-sidebar-collapsed .project-left-rail .rail-header h3,
  body.project-sidebar-collapsed .project-left-rail .rail-intro,
  body.project-sidebar-collapsed .project-left-rail .domain-toggle-label,
  body.project-sidebar-collapsed .project-left-rail .domain-children,
  body.project-sidebar-collapsed .project-left-rail .domain-link[data-project-filter="all"] {
    display: initial;
  }

  body.knowledge-sidebar-collapsed .rail-header {
    position: static;
    display: flex;
    width: auto;
    height: auto;
  }

  body.library-sidebar-collapsed .library-left-rail .rail-header {
    position: static;
    display: flex;
    width: auto;
    height: auto;
  }

  body.project-sidebar-collapsed .project-left-rail .rail-header {
    position: static;
    display: flex;
    width: auto;
    height: auto;
  }

  body.knowledge-sidebar-collapsed .rail-toggle {
    position: static;
    box-shadow: none;
  }

  body.library-sidebar-collapsed .library-left-rail .rail-toggle {
    position: static;
    box-shadow: none;
  }

  body.project-sidebar-collapsed .project-left-rail .rail-toggle {
    position: static;
    box-shadow: none;
  }

  body.knowledge-sidebar-collapsed .domain-group:not(.is-open) .domain-children {
    display: none;
  }

  body.library-sidebar-collapsed .library-left-rail .domain-group:not(.is-open) .domain-children {
    display: none;
  }

  body.project-sidebar-collapsed .project-left-rail .domain-group:not(.is-open) .domain-children {
    display: none;
  }

  .sidebar-open-btn {
    display: inline-flex;
  }

  .knowledge-sidebar-backdrop,
  .library-sidebar-backdrop,
  .project-sidebar-backdrop {
    border: 0;
    background: color-mix(in srgb, #000 40%, transparent);
    position: fixed;
    inset: 68px 0 0;
    z-index: 50;
    display: none;
  }

  body.knowledge-sidebar-open .knowledge-sidebar-backdrop {
    display: block;
  }

  body.library-sidebar-open .library-sidebar-backdrop {
    display: block;
  }

  body.project-sidebar-open .project-sidebar-backdrop {
    display: block;
  }

}

@media (max-width: 720px) {
  .site-nav {
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-right {
    width: 100%;
    justify-content: space-between;
    gap: 0.6rem;
    flex-wrap: wrap;
  }

  .nav-controls {
    margin-left: auto;
  }

  .icon-btn {
    padding: 0.48rem;
    min-width: 34px;
    min-height: 34px;
    justify-content: center;
  }

  .icon-btn [data-theme-label],
  .icon-btn [data-lang-label] {
    display: none;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .page-shell {
    padding-top: 1rem;
  }

  .hero-block {
    padding-top: 2rem;
  }

  .stats-grid,
  .resource-grid,
  .taxonomy-grid {
    grid-template-columns: 1fr;
  }

  .graph-canvas {
    height: 56vh;
    min-height: 360px;
  }

  .graph-settings-drawer {
    top: 76px;
    left: 10px;
    width: calc(100vw - 20px);
    max-height: calc(100vh - 88px);
  }
}