:root {
  --lc-dark: #030710;
  --lc-card: #0b1120;
  --lc-surface: #f2faff;
  --lc-border-dark: #1a2740;
  --lc-border: #b8dfff;
  --lc-muted: #6b8299;
  --lc-body: #c8ddf0;
  --lc-white: #ffffff;
  --lc-dark-text: #030710;
  --lc-blue: #7fc8ff;
  --lc-blue-hover: #99d4ff;
  --lc-blue-bg: #e5f4ff;
  --lc-lime: #e3ff8f;
  --lc-rose: #b27d75;
  --lc-pink: #c78ead;
  --lc-lavender: #d5c3f7;
  /* semantic (dark default) */
  --bg: var(--lc-dark);
  --panel: var(--lc-card);
  --edge: var(--lc-border-dark);
  --text: var(--lc-body);
  --heading: var(--lc-white);
  --muted: var(--lc-muted);
  --tag-bg: rgba(127, 200, 255, 0.12);
  --tag-text: var(--lc-blue);
  --graph-bg: #050a16;
  --node-label: #8ca3bd;
  --code-bg: #0a1424;
}
[data-theme="light"] {
  --bg: var(--lc-surface);
  --panel: #ffffff;
  --edge: var(--lc-border);
  --text: #3d5166;
  --heading: var(--lc-dark-text);
  --muted: #5b7086;
  --tag-bg: var(--lc-blue-bg);
  --tag-text: #1a6fb5;
  --graph-bg: #eaf5ff;
  --node-label: #3d5166;
  --code-bg: #eef6ff;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
}
body {
  font-family:
    "Lausanne",
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}
a {
  color: var(--lc-blue);
  text-decoration: none;
}
a:hover {
  color: var(--lc-blue-hover);
  text-decoration: underline;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--edge);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--panel) 85%, transparent),
    transparent
  );
  backdrop-filter: blur(8px);
  flex: 0 0 auto;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--heading);
}
.brand .lc-logo-full {
  height: 20px;
  width: auto;
}
.brand .divider {
  width: 1px;
  height: 22px;
  background: var(--edge);
}
.brand .title {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--heading);
}
.brand .title small {
  display: block;
  font-weight: 500;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.spacer {
  flex: 1;
}
.control {
  display: flex;
  align-items: center;
  gap: 8px;
}
input.search,
select.filter {
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--edge);
  border-radius: 8px;
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.15s ease;
}
input.search {
  width: 220px;
}
input.search:focus,
select.filter:focus {
  border-color: var(--lc-blue);
}
input.search::placeholder {
  color: var(--muted);
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--edge);
  background: var(--bg);
  color: var(--text);
  transition:
    border-color 0.15s ease,
    color 0.15s ease;
}
.icon-btn:hover {
  border-color: var(--lc-blue);
  color: var(--lc-blue);
}
.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lc-dark-text);
  background: var(--lc-lime);
  padding: 5px 11px;
  border-radius: 100px;
}
.live-pill.stale {
  background: var(--lc-rose);
  color: var(--lc-white);
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

/* Main split */
.main {
  flex: 1;
  display: flex;
  min-height: 0;
}
/* Left index: the whole wiki as a browsable, always-visible list. */
.sidebar {
  width: 236px;
  flex: 0 0 auto;
  border-right: 1px solid var(--edge);
  background: var(--panel);
  overflow-y: auto;
  padding: 20px 14px;
}
.sidebar::-webkit-scrollbar {
  width: 10px;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--edge);
  border-radius: 8px;
}
.sb-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 2px 8px 6px;
}
.sb-head .sb-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.sb-head .sb-count {
  font-size: 11px;
  color: var(--muted);
}
.sb-group {
  margin-top: 12px;
}
.sb-group.hidden {
  display: none;
}
.sb-group-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 4px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.sb-group-head .swatch {
  width: 9px;
  height: 9px;
  border-radius: 3px;
  flex: 0 0 auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  background: none;
  border: none;
  border-radius: 7px;
  padding: 6px 9px;
  cursor: pointer;
  line-height: 1.3;
}
.nav-item:hover {
  background: color-mix(in srgb, var(--lc-blue) 12%, transparent);
}
.nav-item.active {
  background: color-mix(in srgb, var(--lc-blue) 20%, transparent);
  color: var(--heading);
  font-weight: 600;
}
.nav-item.hidden {
  display: none;
}
.nav-item .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.nav-item .nm {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#graph {
  flex: 0 0 auto;
  width: 50%;
  min-width: 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(
    120% 120% at 30% 10%,
    color-mix(in srgb, var(--graph-bg) 92%, var(--lc-blue) 8%),
    var(--graph-bg)
  );
}
/* The splitter occupies only the visible line so it sits flush with both panels.
   Its ::after overlay bleeds over both neighbours to preserve a generous drag
   target without introducing a transparent gutter into the layout. */
.splitter {
  flex: 0 0 2px;
  width: 2px;
  cursor: col-resize;
  background: transparent;
  position: relative;
  z-index: 6;
}
.splitter::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -12px;
  right: -12px;
}
.splitter::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: var(--edge);
  transition: background 0.15s ease;
}
.splitter:hover::before,
.splitter.dragging::before {
  background: var(--lc-blue);
}
.splitter.hidden {
  display: none;
}
.main.dragging {
  cursor: col-resize;
  user-select: none;
}
/* While dragging, the canvas must never see the pointer — not even the release. */
.main.dragging #graph {
  pointer-events: none;
}
.icon-btn.active {
  border-color: var(--lc-blue);
  color: var(--lc-blue);
}
.detail {
  /* No border-left here: the splitter already draws the divider line via
     ::before — a border on both sides of the boundary doubled it up. */
  flex: 1 1 0;
  min-width: 0;
  background: var(--panel);
  overflow-y: auto;
  padding: 40px 48px;
  /* Reader content owns its side of the split and masks graph overlays that
     extend beyond a narrow graph panel. The splitter remains above both. */
  position: relative;
  z-index: 2;
}
.detail::-webkit-scrollbar {
  width: 10px;
}
.detail::-webkit-scrollbar-thumb {
  background: var(--edge);
  border-radius: 8px;
}

/* Bottom-left graph overlay: the controls hint stacked above the type legend.
   It is anchored inside #graph (position:relative), so it can only ever cover
   the graph canvas — never the page index or the reader. The stack is capped
   to the panel's box; a legend with many types scrolls within that cap instead
   of growing into a full-width bar over neighbouring panels. */
.graph-overlay {
  position: absolute;
  left: 20px;
  bottom: 18px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  max-width: calc(100% - 40px);
  max-height: calc(100% - 36px);
  min-height: 0;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border: 1px solid var(--edge);
  backdrop-filter: blur(6px);
  max-width: 100%;
  min-height: 0;
  overflow-y: auto;
}
.legend::-webkit-scrollbar {
  width: 10px;
}
.legend::-webkit-scrollbar-thumb {
  background: var(--edge);
  border-radius: 8px;
}
.legend .item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
}
.legend .swatch {
  width: 11px;
  height: 11px;
  border-radius: 3px;
}

/* Detail content */
.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lc-blue);
}
.detail h1.doc-title {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--heading);
  margin: 10px 0 8px;
}
.detail .desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
  margin: 0 0 18px;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 4px 11px;
  border-radius: 100px;
}
hr.rule {
  border: none;
  border-top: 1px solid var(--edge);
  margin: 22px 0;
}

/* Rendered markdown */
.md {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}
.md h1,
.md h2,
.md h3,
.md h4 {
  color: var(--heading);
  line-height: 1.3;
  margin: 1.6em 0 0.5em;
  letter-spacing: -0.01em;
}
.md h1 {
  font-size: 24px;
  font-weight: 800;
}
.md h2 {
  font-size: 20px;
  font-weight: 700;
}
.md h3 {
  font-size: 17px;
  font-weight: 700;
}
.md h4 {
  font-size: 15px;
  font-weight: 600;
}
.md p {
  margin: 0.7em 0;
}
.md ul,
.md ol {
  padding-left: 1.3em;
  margin: 0.7em 0;
}
.md li {
  margin: 0.3em 0;
}
.md code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--lc-blue);
}
.md pre {
  background: var(--code-bg);
  border: 1px solid var(--edge);
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 1em 0;
}
.md pre code {
  background: none;
  padding: 0;
  color: var(--text);
}
.md blockquote {
  border-left: 3px solid var(--lc-blue);
  margin: 1em 0;
  padding: 0.2em 0 0.2em 16px;
  color: var(--muted);
}
.md table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 14px;
}
.md th,
.md td {
  border: 1px solid var(--edge);
  padding: 8px 12px;
  text-align: left;
}
.md th {
  background: var(--tag-bg);
  color: var(--heading);
}
.md .mermaid {
  display: flex;
  justify-content: center;
  margin: 1.2em 0;
}
.md a.wikilink {
  border-bottom: 1px dashed color-mix(in srgb, var(--lc-blue) 55%, transparent);
}

/* Backlinks */
.backlinks {
  margin-top: 28px;
}
.backlinks .eyebrow {
  display: block;
  margin-bottom: 10px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--edge);
  border-radius: 8px;
  padding: 7px 12px;
  margin: 0 8px 8px 0;
  transition:
    border-color 0.15s ease,
    color 0.15s ease;
}
.chip:hover {
  border-color: var(--lc-blue);
  color: var(--lc-blue);
}
.chip::before {
  content: "↳";
  color: var(--lc-blue);
}

/* Empty state */
.empty {
  color: var(--muted);
  text-align: center;
  margin-top: 20vh;
  font-size: 15px;
}
.empty .lc-logo-mark {
  height: 44px;
  opacity: 0.5;
  margin-bottom: 16px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--lc-blue);
  color: var(--lc-dark-text);
  font-weight: 600;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 100px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
  z-index: 50;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 3D graph node tooltip (rendered by 3d-force-graph on hover) */
.gtip {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--lc-dark-text);
  background: var(--lc-blue);
  padding: 6px 11px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
}
.gtip span {
  margin-top: 3px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(3, 7, 16, 0.62);
}

/* Controls hint, stacked above the legend inside .graph-overlay */
.graph-hint {
  pointer-events: none;
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 100px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  border: 1px solid var(--edge);
  backdrop-filter: blur(6px);
}
.graph-hint b {
  color: var(--lc-blue);
  font-weight: 700;
}