:root {
  --bg: #f5efe4;
  --bg-strong: #efe2c7;
  --panel: rgba(255, 250, 242, 0.9);
  --panel-solid: #fffaf2;
  --text: #1d2d35;
  --muted: #5b6a70;
  --accent: #126e82;
  --accent-strong: #0d5160;
  --accent-soft: #d7edf0;
  --warm: #b85c38;
  --line: rgba(18, 110, 130, 0.14);
  --shadow: 0 18px 40px rgba(22, 41, 48, 0.08);
  --radius: 22px;
  --sidebar-width: 290px;
  --toc-width: 270px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(18, 110, 130, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(184, 92, 56, 0.16), transparent 24%),
    linear-gradient(180deg, #f8f2e8 0%, #f3ede1 100%);
  font-family: "Segoe UI Variable Text", "Trebuchet MS", "Bahnschrift", sans-serif;
}

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

a:hover {
  text-decoration: underline;
}

.landing {
  min-height: 100vh;
  padding: 48px 24px 64px;
}

.landing--redirect {
  display: flex;
  align-items: center;
}

.landing__hero,
.page-hero,
.article,
.sidebar,
.toc {
  backdrop-filter: blur(10px);
}

.landing__hero {
  max-width: 1180px;
  margin: 0 auto 28px;
  padding: 34px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.landing h1,
.page-hero h1 {
  margin: 14px 0 10px;
  font-family: "Cambria", "Georgia", serif;
  font-size: clamp(2rem, 4vw, 4.2rem);
  line-height: 1.02;
}

.lead {
  max-width: 820px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.landing__grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.language-card,
.summary-card,
.callout,
.metric-grid li,
.mini-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.language-card {
  padding: 26px;
}

.language-card h2,
.summary-card h2,
.article h2,
.article h3 {
  font-family: "Cambria", "Georgia", serif;
}

.language-card p,
.summary-card p,
.article p,
.article li {
  color: var(--muted);
  line-height: 1.68;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.button.secondary {
  background: transparent;
  color: var(--accent-strong);
  border-color: var(--line);
}

.wiki-shell {
  min-height: 100vh;
  padding: 20px;
}

.wiki-frame {
  display: grid;
  grid-template-columns: minmax(220px, var(--sidebar-width)) minmax(0, 1fr) minmax(220px, var(--toc-width));
  gap: 18px;
  align-items: start;
}

.sidebar,
.toc,
.article,
.page-hero {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.sidebar,
.toc {
  position: sticky;
  top: 20px;
  border-radius: var(--radius);
  padding: 20px 18px;
}

.sidebar {
  min-height: calc(100vh - 40px);
}

.page-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-hero,
.article {
  border-radius: 28px;
}

.page-hero {
  padding: 28px 30px 24px;
}

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

.hero-chip {
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.55);
  font-size: 0.92rem;
}

.article {
  padding: 28px 30px 32px;
}

.article h2 {
  margin-top: 34px;
  margin-bottom: 10px;
  font-size: 1.9rem;
  color: #163942;
}

.article h3 {
  margin-top: 24px;
  margin-bottom: 8px;
  font-size: 1.34rem;
  color: #244a55;
}

.article ul,
.article ol {
  padding-left: 24px;
}

.summary-grid,
.card-grid,
.metric-grid,
.figure-grid {
  display: grid;
  gap: 16px;
}

.summary-grid,
.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.figure-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin: 20px 0;
}

.summary-card,
.callout,
.mini-card,
.doc-figure {
  padding: 18px;
}

.callout {
  margin: 20px 0;
  border-left: 6px solid var(--warm);
}

.metric-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  list-style: none;
  padding: 0;
}

.metric-grid li {
  padding: 16px;
}

.metric-grid strong {
  display: block;
  margin-bottom: 8px;
  color: #163942;
}

.doc-figure {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.doc-figure h4 {
  margin: 0 0 10px;
  font-family: "Cambria", "Georgia", serif;
  font-size: 1.1rem;
  color: #244a55;
}

.doc-shot-placeholder {
  min-height: 180px;
  padding: 18px;
  border: 1px dashed rgba(18, 110, 130, 0.35);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(18, 110, 130, 0.06), rgba(184, 92, 56, 0.08)),
    rgba(255, 255, 255, 0.55);
  color: var(--muted);
}

.doc-shot-placeholder strong {
  display: block;
  margin-bottom: 8px;
  color: #163942;
}

.doc-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(18, 110, 130, 0.16);
  background: #fff;
  cursor: zoom-in;
}

.doc-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.62;
}

.doc-figure-link {
  display: block;
}

.doc-figure-link:hover {
  text-decoration: none;
}

.has-image-lightbox {
  overflow: hidden;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
}

.image-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 20, 24, 0.78);
}

.image-lightbox__dialog {
  position: relative;
  z-index: 1;
  width: min(96vw, 1800px);
  max-height: 94vh;
  margin: 3vh auto;
  padding: 56px 24px 24px;
  overflow: auto;
}

.image-lightbox__image {
  display: block;
  max-width: none;
  max-height: none;
  width: auto;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.image-lightbox__close {
  position: sticky;
  top: 0;
  display: block;
  margin-left: auto;
  margin-bottom: 12px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: rgba(20, 26, 29, 0.82);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.image-lightbox__close:hover {
  background: rgba(20, 26, 29, 0.95);
}

.figure-meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.source-list {
  display: none;
}

.mermaid {
  margin: 20px 0;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  overflow-x: auto;
  font-size: 16px;
}

.mermaid svg {
  max-width: 100%;
  height: auto;
}

.brand {
  margin-bottom: 18px;
}

.brand-logo {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
}

.brand-logo--landing {
  max-width: 280px;
  margin-bottom: 18px;
}

.brand__title {
  margin: 10px 0 4px;
  font-family: "Cambria", "Georgia", serif;
  font-size: 1.48rem;
}

.brand__text,
.nav-label,
.toc__text,
.sidebar-note {
  color: var(--muted);
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 18px 0 22px;
}

.nav-link,
.toc-link {
  display: block;
  padding: 10px 12px;
  border-radius: 14px;
  color: #27444c;
}

.nav-link:hover,
.toc-link:hover {
  background: rgba(18, 110, 130, 0.08);
  text-decoration: none;
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(18, 110, 130, 0.14), rgba(184, 92, 56, 0.12));
  color: #0d5160;
  font-weight: 700;
}

.lang-switch {
  display: flex;
  gap: 8px;
  margin-top: 18px;
}

.lang-switch a {
  flex: 1;
  text-align: center;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.lang-switch a.current {
  background: var(--accent);
  color: #fff;
}

.mobile-toggle {
  display: none;
  width: 100%;
  margin: 0 0 14px;
  min-height: 44px;
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.mini-card-link {
  display: block;
  height: 100%;
  color: inherit;
}

.mini-card-link:hover {
  text-decoration: none;
}

.mini-card--link {
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

.mini-card--link:hover {
  transform: translateY(-3px);
  border-color: rgba(18, 110, 130, 0.28);
  box-shadow: 0 22px 44px rgba(22, 41, 48, 0.12);
}

.footer-note {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(18, 110, 130, 0.08);
  font-family: "Consolas", "Lucida Console", monospace;
  color: #11424d;
}

@media (max-width: 1180px) {
  .wiki-frame {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  }

  .toc {
    grid-column: 2;
    position: static;
  }
}

@media (max-width: 900px) {
  .wiki-shell {
    padding: 14px;
  }

  .wiki-frame {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    min-height: auto;
  }

  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .sidebar.is-collapsed .nav-wrap {
    display: none;
  }

  .article,
  .page-hero {
    padding: 22px 20px;
  }
}