@font-face {
  font-family: "Inter";
  src: url("/fonts/inter-variable.ttf") format("truetype");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("/fonts/newsreader-variable.ttf") format("truetype");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/space-grotesk-variable.ttf") format("truetype");
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
}

:root {
  --font-serif: "Newsreader", "Source Han Serif SC", "Noto Serif SC", serif;
  --font-body: "Inter", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --font-mono: "Space Grotesk", "SFMono-Regular", "Menlo", monospace;
  --canvas: #f7f9fd;
  --surface: #ffffff;
  --surface-alt: #f2f4f8;
  --surface-soft: #eef2f7;
  --line: #e1e6ef;
  --line-strong: #cfd7e3;
  --text: #191c1f;
  --text-soft: #3b4350;
  --muted: #6e7684;
  --muted-strong: #5a6372;
  --accent: #0058be;
  --accent-soft: rgba(0, 88, 190, 0.08);
  --content-width: 720px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--canvas);
  font-family: var(--font-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.wiki-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
}

.wiki-rail {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.wiki-rail {
  padding: 30px 20px 32px;
  border-right: 1px solid var(--line);
  background: var(--surface);
}

.wiki-brand {
  margin-bottom: 34px;
}

.wiki-brand a {
  display: block;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.wiki-brand p {
  margin: 8px 0 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.wiki-rail-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.wiki-rail-nav a {
  display: block;
  padding: 10px 0 10px 14px;
  border-left: 2px solid transparent;
  color: var(--muted-strong);
  font-size: 0.95rem;
  line-height: 1.3;
  border-radius: 0 4px 4px 0;
}

.wiki-rail-nav a:hover {
  background: var(--surface-alt);
  color: var(--text);
  text-decoration: none;
}

.wiki-rail-nav a.is-active {
  border-left-color: var(--accent);
  background: var(--surface-alt);
  color: var(--text);
  font-weight: 500;
}

.wiki-explorer-kicker,
.doc-eyebrow,
.doc-meta span,
.doc-path,
.doc-pill,
.library-summary dt,
.home-note,
.kb-legend-item,
.kb-graph-note {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.wiki-main {
  min-width: 0;
  padding: 44px 52px 72px;
}

.doc-panel {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
}

.graph-panel {
  max-width: 1160px;
}

.page-graph .wiki-main {
  display: flex;
  min-height: 100vh;
  padding: 0;
}

.page-graph .doc-panel,
.page-graph .graph-panel {
  max-width: none;
  width: 100%;
  margin: 0;
  min-height: 100vh;
}

.page-graph .graph-panel {
  display: flex;
}

.page-graph .graph-panel > * {
  flex: 1 1 auto;
}

.doc-header {
  margin-bottom: 36px;
}

.doc-eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.7rem;
}

.doc-header h1 {
  margin: 0;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 4.2vw, 3.65rem);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 14px;
}

.doc-meta span {
  color: var(--muted);
  font-size: 0.68rem;
}

.doc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.doc-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--muted-strong);
  font-size: 0.68rem;
}

.doc-pill:hover {
  background: var(--surface-alt);
  border-color: var(--line-strong);
  text-decoration: none;
}

.doc-path {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  word-break: break-all;
}

.doc-copy,
.doc-intro {
  color: var(--text-soft);
  font-size: 1.04rem;
  line-height: 1.82;
}

.doc-intro {
  max-width: 40rem;
  margin-top: 14px;
}

.doc-muted {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.doc-copy > :first-child {
  margin-top: 0;
}

.doc-copy > :last-child {
  margin-bottom: 0;
}

.doc-copy h2,
.doc-copy h3,
.doc-copy h4 {
  color: var(--text);
  font-family: var(--font-serif);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.doc-copy h2 {
  margin-top: 2.3em;
  margin-bottom: 0.7em;
  font-size: 2rem;
  font-weight: 600;
}

.doc-copy h3 {
  margin-top: 1.8em;
  margin-bottom: 0.56em;
  font-size: 1.42rem;
  font-weight: 500;
}

.doc-copy h4 {
  margin-top: 1.6em;
  margin-bottom: 0.48em;
  font-size: 1.12rem;
  font-weight: 600;
}

.doc-copy p,
.doc-copy ul,
.doc-copy ol,
.doc-copy blockquote,
.doc-copy pre,
.doc-copy table,
.doc-copy figure {
  margin-top: 1em;
  margin-bottom: 1em;
}

.doc-copy ul,
.doc-copy ol {
  padding-left: 1.3rem;
}

.doc-copy li + li {
  margin-top: 0.45rem;
}

.doc-copy a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.doc-copy strong {
  color: var(--text);
}

.doc-copy code {
  padding: 0.15em 0.38em;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-alt);
  font-family: var(--font-mono);
  font-size: 0.86em;
}

.doc-copy pre {
  overflow-x: auto;
  padding: 18px;
  border: 1px solid #0f172a;
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
}

.doc-copy pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.92em;
}

.doc-copy blockquote {
  margin-left: 0;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--accent);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.42rem;
  font-style: italic;
  line-height: 1.5;
}

.doc-copy img {
  display: block;
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
}

.doc-copy hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2.2rem 0;
}

.doc-copy table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.96rem;
}

.doc-copy th,
.doc-copy td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}

.doc-copy th {
  background: var(--surface-alt);
  color: var(--text);
  font-weight: 600;
}

.home-panel {
  display: flex;
  min-height: calc(100vh - 130px);
  flex-direction: column;
  justify-content: center;
}

.home-panel h1 {
  max-width: none;
  white-space: nowrap;
}

.home-tagline {
  margin: 18px 0 0;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1.32rem;
  line-height: 1.5;
}

.home-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
}

.library-panel {
  max-width: 1080px;
}

.library-feed {
  margin-top: 4px;
  border-top: 1px solid var(--line);
}

.library-item {
  border-bottom: 1px solid var(--line);
}

.library-item-link {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
}

.library-item-main h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.library-item-title {
  color: var(--text);
}

.library-item:hover .library-item-title {
  color: var(--accent);
}

.library-item-title:hover {
  text-decoration: none;
}

.library-item-concepts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.library-item-concepts span,
.library-item-meta time {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.library-item-concepts span {
  padding: 4px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
}

.library-item-concepts span:empty {
  display: none;
}

.library-item-concepts span a {
  color: inherit;
}

.library-item-meta {
  flex: 0 0 auto;
  padding-top: 4px;
}

.pager {
  margin-top: 24px;
}

.pager-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pager-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pager-link:hover {
  background: var(--surface-alt);
  text-decoration: none;
}

.pager-link.is-current {
  background: var(--surface-alt);
  color: var(--text);
}

.not-found-panel {
  padding-top: 6vh;
}

.not-found-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 22px 0 0;
}

.not-found-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.not-found-links a:hover {
  background: var(--surface-alt);
  text-decoration: none;
}

@media (max-width: 1280px) {
  .wiki-shell {
    grid-template-columns: 204px minmax(0, 1fr);
  }

  .wiki-main {
    padding: 38px 36px 60px;
  }
}

@media (max-width: 980px) {
  .wiki-shell {
    display: block;
  }

  .wiki-rail {
    position: static;
    height: auto;
  }

  .wiki-rail {
    padding: 20px 18px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .wiki-brand {
    margin-bottom: 18px;
  }

  .wiki-rail-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px;
  }

  .wiki-rail-nav a {
    padding: 8px 12px;
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: 4px 4px 0 0;
  }

  .wiki-rail-nav a.is-active {
    border-left: 0;
    border-bottom-color: var(--accent);
  }

  .wiki-main {
    padding: 30px 18px 46px;
  }

  .home-panel {
    min-height: auto;
  }

  .library-item-link {
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 640px) {
  .doc-header h1 {
    font-size: 2.45rem;
  }

  .doc-copy,
  .doc-intro {
    font-size: 1rem;
  }

  .doc-copy blockquote {
    font-size: 1.24rem;
  }

  .home-panel h1 {
    white-space: normal;
  }
}