:root {
  --light: #faf8f8;
  --lightgray: #e5e5e5;
  --gray: #b8b8b8;
  --darkgray: #4e4e4e;
  --dark: #2b2b2b;
  --secondary: #284b63;
  --tertiary: #84a59d;
  --highlight: #8f9fa926;
  --textHighlight: #fff23688;
  --headerFont: "IBM Plex Mono", ui-monospace, "Courier New", monospace;
  --bodyFont: "Besley", Georgia, "Times New Roman", serif;
  --codeFont: "IBM Plex Mono", ui-monospace, "Courier New", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 18px;
  overflow-x: hidden;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-padding-top: 2rem;
}

body {
  margin: 0;
  background-color: var(--light);
  font-family: var(--bodyFont);
  color: var(--darkgray);
}

p, ul, ol, li, tr, td, a, .katex {
  color: var(--darkgray);
  hyphens: auto;
  overflow-wrap: anywhere;
}

tbody, li, p { line-height: 1.6rem; }
p { margin: 1rem 0; }
strong { font-weight: 600; }
article p > strong { color: var(--dark); }

a {
  color: var(--secondary);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--tertiary); }

h1, h2, h3, h4, h5, h6, thead {
  font-family: var(--headerFont);
  color: var(--dark);
  margin-bottom: 0;
}
h1 { margin-top: 2.25rem; margin-bottom: 1rem; font-size: 1.75rem; }
h2 { margin-top: 1.9rem;  margin-bottom: 1rem; font-size: 1.4rem; }
h3 { margin-top: 1.62rem; margin-bottom: 1rem; font-size: 1.12rem; }
h4, h5, h6 { margin-top: 1.5rem; margin-bottom: 1rem; font-size: 1rem; }

h2[id] > a.anchor, h3[id] > a.anchor {
  opacity: 0;
  font-family: var(--codeFont);
  font-weight: 400;
  user-select: none;
  margin: 0 0.5rem;
  transition: opacity 0.2s;
}
h2[id]:hover > a.anchor, h3[id]:hover > a.anchor { opacity: 1; }

blockquote {
  border-left: 3px solid var(--secondary);
  margin: 1rem 0;
  padding-left: 1rem;
  transition: border-color 0.2s;
}

img {
  border-radius: 5px;
  max-width: 100%;
  margin: 1rem 0;
  display: block;
}

figure { margin: 1.5rem 0; }
figure > figcaption {
  font-size: 0.8rem;
  color: var(--gray);
  font-family: var(--headerFont);
  margin-top: -0.5rem;
}

video { border-radius: 5px; max-width: 100%; margin: 1rem 0; }

hr {
  border: none;
  border-top: 1px solid var(--lightgray);
  margin: 2rem 0;
}

.table-container { overflow-x: auto; margin: 1rem 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
th {
  text-align: left;
  border-bottom: 2px solid var(--gray);
  padding: 0.4rem 0.7rem;
  font-family: var(--headerFont);
  color: var(--dark);
}
td { padding: 0.35rem 0.7rem; vertical-align: top; }
td, th { overflow-wrap: normal; hyphens: none; }
table a { white-space: nowrap; }
tr { border-bottom: 1px solid var(--lightgray); }
tr:last-child { border-bottom: none; }

code {
  font-family: var(--codeFont);
  font-size: 0.9em;
  background-color: var(--highlight);
  border-radius: 5px;
  padding: 0.1rem 0.2rem;
}
pre {
  font-family: var(--codeFont);
  border: 1px solid var(--lightgray);
  border-radius: 5px;
  padding: 0.6rem 0.8rem;
  overflow-x: auto;
  background-color: #fff;
}
pre > code {
  background: none;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.5rem;
}

::selection { background: color-mix(in srgb, var(--tertiary) 60%, transparent); color: var(--darkgray); }

/* ===== layout ===== */
.page { max-width: 100%; }
.page > #quartz-body {
  display: grid;
  grid-template:
    "grid-sidebar-left grid-header        grid-sidebar-right"
    "grid-sidebar-left grid-center        grid-sidebar-right"
    "grid-sidebar-left grid-footer        grid-sidebar-right"
    / 320px auto 320px;
  gap: 5px;
}

.page > #quartz-body .sidebar {
  box-sizing: border-box;
  display: flex;
  gap: 2rem;
  height: 100vh;
  padding: 6rem 2rem 2rem;
  position: sticky;
  top: 0;
}
.page > #quartz-body .sidebar.left {
  grid-area: grid-sidebar-left;
  flex-direction: column;
  z-index: 1;
}
.page > #quartz-body .sidebar.right {
  grid-area: grid-sidebar-right;
  flex-direction: column;
  overflow-y: auto;
}
.page > #quartz-body .page-header { grid-area: grid-header; margin: 6rem 0 0; }
.page > #quartz-body .center > article { grid-area: grid-center; }
.page > #quartz-body footer {
  grid-area: grid-footer;
  font-family: var(--headerFont);
  font-size: 0.8rem;
  color: var(--gray);
  border-top: 1px solid var(--lightgray);
  margin-top: 4rem;
  padding: 1.5rem 0 4rem;
}
.page > #quartz-body footer a { color: var(--gray); font-weight: 400; }
.page > #quartz-body footer a:hover { color: var(--tertiary); }
.page > #quartz-body .center { min-width: 100%; max-width: 100%; }

/* ===== left sidebar ===== */
.page-title { margin: 0; font-size: 1.75rem; }
.page-title a { color: var(--secondary); }

.sidebar.left .site-tag {
  font-family: var(--headerFont);
  font-size: 0.72rem;
  color: var(--gray);
  margin: 0.35rem 0 0;
  letter-spacing: 0.02em;
}

.sidebar-logos { display: flex; flex-direction: column; align-items: flex-start; gap: 1rem; }
.sidebar-logos img { margin: 0; border-radius: 0; }
.sidebar-logos .gsoc-mark { width: 100%; max-width: 205px; }
.sidebar-logos .org-mark { width: 108px; }

.explorer { display: flex; flex-direction: column; overflow-y: hidden; }
button.explorer-toggle,
button.toc-toggle {
  display: flex;
  align-items: center;
  text-align: left;
  cursor: pointer;
  color: var(--dark);
  background-color: transparent;
  border: none;
  padding: 0;
  font-family: var(--headerFont);
}
button.explorer-toggle h2, button.toc-toggle h3 {
  margin: 0;
  font-size: 1rem;
  display: inline-block;
}
button .fold { margin-left: 0.5rem; opacity: 0.8; transition: transform 0.3s; }
button.collapsed .fold { transform: rotate(-90deg); }

.explorer-content, .toc-content {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  max-height: 100%;
  transition: max-height 0.35s;
}
.explorer-content.collapsed, .toc-content.collapsed { max-height: 0; }

.explorer-content ul {
  list-style: none;
  padding-left: 1.4rem;
  margin: 0;
  overflow: hidden;
  max-height: 60rem;
  transition: max-height 0.3s ease-in-out;
}
.explorer-content ul.collapsed { max-height: 0; }
.explorer-content > ul { padding-left: 0; }
.explorer-content li { margin: 0; }

button.folder-container {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.4rem;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--headerFont);
}
button.folder-container .folder-icon { transition: transform 0.3s; transform: rotate(90deg); }
button.folder-container.collapsed .folder-icon { transform: rotate(0deg); }
button.folder-container:hover .folder-title { color: var(--tertiary); }
.folder-container .folder-icon { color: var(--dark); flex-shrink: 0; }
.folder-title {
  font-family: var(--headerFont);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--secondary);
  line-height: 1.5rem;
}
.explorer-content li > a {
  font-family: var(--bodyFont);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4rem;
  display: inline-block;
  padding: 0.18rem 0;
  color: var(--dark);
}
.explorer-content li > a:hover { color: var(--tertiary); }
.explorer-content li > a.active { color: var(--secondary); }

.explorer-ul { overflow-y: auto; }

/* ===== center ===== */
.breadcrumb-container {
  display: flex;
  flex-flow: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  padding: 0;
  font-family: var(--headerFont);
  font-size: 0.9rem;
}
.breadcrumb-element { display: flex; flex-direction: row; align-items: center; }
.breadcrumb-element p { margin: 0 0 0 0.5rem; padding: 0; line-height: normal; color: var(--gray); }
.breadcrumb-element a { font-weight: 400; }
.breadcrumb-element:last-child a { color: var(--dark); }

.article-title { margin: 2rem 0 0; }
.content-meta {
  color: var(--gray);
  margin-top: 0;
  font-family: var(--headerFont);
  font-size: 0.85rem;
}
.content-meta > :not(:last-child) { margin-right: 8px; }
.content-meta > :not(:last-child)::after { content: ","; }

article { padding-bottom: 1rem; }
article > :first-child { margin-top: 0; }

/* ===== right sidebar ===== */
.graph { display: flex; flex-direction: column; }
.graph h3 { margin: 0 0 0.5rem; font-size: 1rem; font-family: var(--headerFont); }
.graph-container {
  border: 1px solid var(--lightgray);
  border-radius: 5px;
  background-color: var(--light);
  height: 250px;
  width: 100%;
}
.graph-container .node-label {
  font-family: var(--headerFont);
  font-size: 7px;
  fill: var(--darkgray);
}

.toc { display: flex; flex-direction: column; }
.toc-content li {
  list-style: none;
  font-family: var(--bodyFont);
  line-height: 1.4rem;
  margin: 0.35rem 0;
}
.toc-content li a {
  color: var(--dark);
  opacity: 0.35;
  font-weight: 400;
  transition: opacity 0.2s, color 0.2s;
}
.toc-content li a:hover { opacity: 1; color: var(--tertiary); }
.toc-content li a.in-view { opacity: 0.75; color: var(--dark); }
.toc-content li.depth-1 { padding-left: 1rem; font-size: 0.9rem; }

/* ===== callout ===== */
.callout {
  border: 1px solid var(--lightgray);
  border-left: 3px solid var(--secondary);
  border-radius: 5px;
  padding: 0.8rem 1rem;
  margin: 1.5rem 0;
  background-color: #fff;
}
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }
.callout-title {
  font-family: var(--headerFont);
  font-weight: 600;
  color: var(--dark);
  font-size: 0.9rem;
  margin: 0 0 0.4rem;
}

.factsheet { font-family: var(--headerFont); font-size: 0.85rem; margin: 1.5rem 0; }
.factsheet div { display: flex; gap: 0.6rem; padding: 0.22rem 0; }
.factsheet span { color: var(--gray); min-width: 8.5rem; display: inline-block; }

.desktop-only { display: initial; }
.mobile-only { display: none; }

@media (min-width: 800px) and (max-width: 1200px) {
  .page > #quartz-body {
    grid-template:
      "grid-sidebar-left grid-header"
      "grid-sidebar-left grid-center"
      "grid-sidebar-left grid-sidebar-right"
      "grid-sidebar-left grid-footer"
      / 320px auto;
  }
  .page > #quartz-body .sidebar.right {
    position: initial;
    height: unset;
    flex-direction: row;
    width: 100%;
    padding: 0;
  }
  .page > #quartz-body .sidebar.right > .toc { display: none; }
}

@media (max-width: 1200px) { .page > #quartz-body { padding: 0 1rem; } }

@media (max-width: 800px) {
  html { font-size: 16px; }
  .page > #quartz-body {
    grid-template:
      "grid-sidebar-left"
      "grid-header"
      "grid-center"
      "grid-sidebar-right"
      "grid-footer"
      / auto;
    margin: 0 auto;
  }
  .page > #quartz-body .sidebar.left {
    position: initial;
    height: unset;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem 0 0;
  }
  .page > #quartz-body .sidebar.right {
    position: initial;
    height: unset;
    padding: 0;
  }
  .page > #quartz-body .page-header { margin-top: 0; padding: 0; }
  .desktop-only { display: none; }
  .mobile-only { display: initial; }
}

.status-note {
  font-family: var(--headerFont);
  font-size: 0.78rem;
  color: var(--gray);
  margin: 1.5rem 0 0;
}

[data-state-for] {
  font-family: var(--headerFont);
  font-size: 0.8rem;
  white-space: nowrap;
}
.pr-state-merged { color: var(--secondary); font-weight: 600; }
.pr-state-approved {
  color: #60746f;
  color: color-mix(in srgb, var(--tertiary) 60%, var(--dark));
  font-weight: 600;
}
.pr-state-draft, .pr-state-not-planned {
  color: #727272;
  color: color-mix(in srgb, var(--gray) 50%, var(--dark));
}