:root {
  --light_background: #fbfcfe;
  --light_foreground: #1f2937;
  --light_surface: #ffffff;
  --light_surface-muted: #f3f6fa;
  --light_border: #dce3eb;
  --light_muted: #64748b;
  --light_accent: #2563eb;
  --light_accent-soft: #eaf2ff;
  --light_code: #f6f8fa;
  --light_green: #eaf7ef;
  --light_orange: #fff4df;
  --light_yellow: #fff9d9;
  --light_red: #ffebea;

  --dark_background: #101620;
  --dark_foreground: #e7edf5;
  --dark_surface: #17202d;
  --dark_surface-muted: #1c2736;
  --dark_border: #334155;
  --dark_muted: #9aa9bc;
  --dark_accent: #83b4ff;
  --dark_accent-soft: #1d3557;
  --dark_code: #131c28;
  --dark_green: #18382c;
  --dark_orange: #49331b;
  --dark_yellow: #403817;
  --dark_red: #472526;

  --background: var(--light_background);
  --foreground: var(--light_foreground);
  --surface: var(--light_surface);
  --surface-muted: var(--light_surface-muted);
  --border: var(--light_border);
  --muted: var(--light_muted);
  --accent: var(--light_accent);
  --accent-soft: var(--light_accent-soft);
  --code-background: var(--light_code);
  --green: var(--light_green);
  --orange: var(--light_orange);
  --yellow: var(--light_yellow);
  --red: var(--light_red);
  --topbar-height: 58px;
  --content-width: 76ch;
  color: var(--foreground);
  background: var(--background);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: var(--dark_background);
    --foreground: var(--dark_foreground);
    --surface: var(--dark_surface);
    --surface-muted: var(--dark_surface-muted);
    --border: var(--dark_border);
    --muted: var(--dark_muted);
    --accent: var(--dark_accent);
    --accent-soft: var(--dark_accent-soft);
    --code-background: var(--dark_code);
    --green: var(--dark_green);
    --orange: var(--dark_orange);
    --yellow: var(--dark_yellow);
    --red: var(--dark_red);
    color-scheme: dark;
  }
}

:root.dark-theme {
  --background: var(--dark_background);
  --foreground: var(--dark_foreground);
  --surface: var(--dark_surface);
  --surface-muted: var(--dark_surface-muted);
  --border: var(--dark_border);
  --muted: var(--dark_muted);
  --accent: var(--dark_accent);
  --accent-soft: var(--dark_accent-soft);
  --code-background: var(--dark_code);
  --green: var(--dark_green);
  --orange: var(--dark_orange);
  --yellow: var(--dark_yellow);
  --red: var(--dark_red);
  color-scheme: dark;
}

:root.light-theme {
  --background: var(--light_background);
  --foreground: var(--light_foreground);
  --surface: var(--light_surface);
  --surface-muted: var(--light_surface-muted);
  --border: var(--light_border);
  --muted: var(--light_muted);
  --accent: var(--light_accent);
  --accent-soft: var(--light_accent-soft);
  --code-background: var(--light_code);
  --green: var(--light_green);
  --orange: var(--light_orange);
  --yellow: var(--light_yellow);
  --red: var(--light_red);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html, body {
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  background: var(--background);
}

body {
  color: var(--foreground);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

::selection {
  color: var(--foreground);
  background: var(--accent-soft);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.55rem 0.8rem;
  border-radius: 7px;
  background: var(--surface);
  box-shadow: 0 2px 12px rgb(15 23 42 / 18%);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

button, input {
  color: var(--foreground);
  font: inherit;
}

.body {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "navtop navtop"
    "sidebar main";
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
}

input:checked + .body > nav.sidebar {
  display: none;
}

.nav-top-container {
  z-index: 3;
  grid-area: navtop;
  height: var(--topbar-height);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: 0 1px 8px rgb(15 23 42 / 6%);
}

.nav-top {
  display: flex;
  gap: 5px;
  align-items: center;
  height: 100%;
  padding: 7px 12px;
  overflow: hidden;
}

.nav-top > :nth-child(4) {
  margin-left: auto;
}

.nav-top > span {
  width: 42px;
  height: 42px;
}

.nav-top button, .nav-top a, .nav-top label {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 9px;
  appearance: none;
  color: var(--muted);
  background: transparent;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 26px;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  transition: color 120ms ease, background-color 120ms ease;
}

.nav-top button:hover, .nav-top a:hover, .nav-top label:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.sidebar-toggle, .search-toggle, .theme-toggle,
.chapter-previous, .chapter-next {
  position: relative;
  font-size: 0 !important;
}

.sidebar-toggle, button.search-toggle, button.theme-toggle {
  cursor: pointer;
}

.sidebar-toggle::before, .search-toggle::before, .search-toggle::after,
.theme-toggle::before, .chapter-previous::before, .chapter-next::before {
  position: absolute;
  content: "";
}

.sidebar-toggle::before {
  top: 20px;
  left: 12px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  box-shadow: 0 -6px currentColor, 0 6px currentColor;
}

.search-toggle::before {
  top: 11px;
  left: 12px;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.search-toggle::after {
  top: 24px;
  left: 23px;
  width: 7px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: rotate(45deg);
  transform-origin: left center;
}

.theme-toggle::before {
  top: 10px;
  left: 10px;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
}

.chapter-previous::before, .chapter-next::before {
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  margin: -7px 0 0 -7px;
  border: solid currentColor;
  border-width: 0 2px 2px 0;
}

.chapter-previous::before {
  transform: rotate(135deg);
}

.chapter-next::before {
  transform: rotate(-45deg);
}

.nav-search {
  z-index: 2;
  flex: 0 0 auto;
  width: 100%;
  padding: 12px max(2rem, calc((100% - var(--content-width)) / 2 + 2rem));
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.search-visible nav.nav-search {
  display: block !important;
}

#search {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--foreground);
  background: var(--surface);
  box-shadow: 0 1px 2px rgb(15 23 42 / 5%);
  font-size: 1rem;
}

#search:focus {
  border-color: var(--accent);
}

#search-results {
  max-height: calc(60vh - var(--topbar-height));
  overflow-y: auto;
}

#search-results ol {
  margin: 0;
  padding: 0.8rem 0 1rem 1.5rem;
}

nav.sidebar {
  grid-area: sidebar;
  width: clamp(15rem, 23vw, 19rem);
  padding: 1.6rem 1rem 3rem;
  overflow: auto;
  overscroll-behavior: contain;
  border-right: 1px solid var(--border);
  background: var(--surface-muted);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

nav.sidebar > :first-child {
  margin-top: 0;
}

nav.sidebar h1, nav.sidebar h2 {
  padding: 0 0.65rem;
  color: var(--foreground);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  line-height: 1.4;
  text-transform: uppercase;
}

nav.sidebar h1 {
  margin: 0 0 0.2rem;
}

nav.sidebar h1 + p {
  margin: 0 0 1rem;
  padding: 0 0.65rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.4;
}

nav.sidebar h2 {
  margin: 1.4rem 0 0.35rem;
}

nav.sidebar h2 + ul {
  margin-left: 0.65rem;
}

nav ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

nav ul ul {
  margin-left: 0.7rem;
  padding-left: 0.55rem;
  border-left: 1px solid var(--border);
}

nav.sidebar li + li {
  margin-top: 0.15rem;
}

nav.sidebar li:not(:has(> a)) {
  padding-left: 0.65rem;
}

nav.sidebar a {
  display: block;
  padding: 0.42rem 0.65rem;
  border-radius: 7px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.35;
  text-decoration: none;
  transition: color 120ms ease, background-color 120ms ease;
}

nav.sidebar a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

nav.sidebar a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 3px 0 var(--accent);
  font-weight: 700;
}

.nav-chapter-previous {
  float: left;
}

.nav-chapter-next {
  float: right;
}

section#main {
  grid-area: main;
  display: flex;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  flex-direction: column;
}

.main-scroll {
  min-height: 0;
  flex: 1 1 auto;
  overflow: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

main {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding: 3rem 2rem 20rem;
}

main :is(h1, h2, h3, h4, h5, h6) {
  color: var(--foreground);
  font-weight: 720;
  letter-spacing: -0.018em;
  scroll-margin-top: 1.5rem;
  text-wrap: balance;
}

main :is(h1, h2, h3, h4, h5, h6) a {
  color: inherit;
  text-decoration: none;
}

main :is(h1, h2, h3, h4, h5, h6) a:hover {
  color: var(--accent);
}

main h1 {
  margin: 0 0 1.3rem;
  font-size: clamp(2.25rem, 5vw, 3.15rem);
  line-height: 1.08;
}

main h2 {
  margin: 3.2rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.8rem;
  line-height: 1.25;
}

main h3 {
  margin: 2.4rem 0 0.75rem;
  font-size: 1.38rem;
  line-height: 1.3;
}

main h4 {
  margin: 2rem 0 0.65rem;
  font-size: 1.1rem;
  line-height: 1.4;
}

main :is(p, ul, ol, dl, pre, table, blockquote) {
  margin-top: 1.15rem;
  margin-bottom: 0;
}

main p {
  text-wrap: pretty;
}

main :is(ul, ol) {
  padding-left: 1.4rem;
}

main li + li {
  margin-top: 0.3rem;
}

main li::marker {
  color: var(--muted);
}

main hr {
  margin: 2.8rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

main img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

main blockquote {
  margin-left: 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: 1.05rem;
}

main blockquote > :first-child {
  margin-top: 0;
}

main table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  border-spacing: 0;
  border-collapse: separate;
}

main th, main td {
  padding: 0.65rem 0.85rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: left;
}

main th {
  background: var(--surface-muted);
  font-weight: 650;
}

main tr > :last-child {
  border-right: 0;
}

main tr:last-child > td {
  border-bottom: 0;
}

main .admonition {
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border: 1px solid color-mix(in srgb, #238b57 35%, var(--border));
  border-left: 4px solid #238b57;
  border-radius: 8px;
  background: var(--green);
}

main .attention, main .caution, main .warning {
  border-color: color-mix(in srgb, #c77800 35%, var(--border));
  border-left-color: #c77800;
  background: var(--orange);
}

main .danger, main .error {
  border-color: color-mix(in srgb, #d53b3b 35%, var(--border));
  border-left-color: #d53b3b;
  background: var(--red);
}

main .important, main .note {
  border-color: color-mix(in srgb, #b28a00 35%, var(--border));
  border-left-color: #b28a00;
  background: var(--yellow);
}

main .admonition .title {
  margin: 0 0 0.35rem;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

main .admonition > :last-child {
  margin-bottom: 0;
}

code {
  padding: 0.16em 0.36em;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--code-background);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.dark-theme .hljs, .light-theme .hljs {
  background: var(--code-background);
}

pre {
  position: relative;
}

pre code, pre code.hljs {
  display: block;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 3%);
  font-size: 0.86rem;
  line-height: 1.65;
  scrollbar-width: thin;
}

code.language-ShellSession .hljs-meta,
code.language-shellsession .hljs-meta,
code.language-Shell .hljs-meta,
code.language-shell .hljs-meta,
code.language-Console .hljs-meta,
code.language-console .hljs-meta {
  user-select: none;
}

@media (max-width: 700px) {
  :root {
    --topbar-height: 56px;
  }

  .body {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "main"
      "navtop";
    grid-template-rows: minmax(0, 1fr) var(--topbar-height);
  }

  .nav-top-container {
    border-top: 1px solid var(--border);
    border-bottom: 0;
    box-shadow: 0 -1px 8px rgb(15 23 42 / 8%);
  }

  .nav-top {
    justify-content: space-between;
    padding: 6px 8px;
  }

  .nav-top > :nth-child(4) {
    margin-left: 0;
  }

  input:checked + .body > nav.sidebar {
    display: block;
  }

  input:not(:checked) + .body > nav.sidebar {
    display: none;
  }

  .search-visible input:checked + .body > nav.sidebar {
    display: none;
  }

  nav.sidebar {
    z-index: 2;
    grid-area: main;
    width: 100%;
    padding: 1.5rem 1rem 4rem;
    border-right: 0;
  }

  .nav-search {
    width: 100%;
    padding: 10px 1.25rem;
  }

  main {
    padding: 2.25rem 1.25rem 8rem;
  }

  main h1 {
    font-size: 2.25rem;
  }

  main h2 {
    margin-top: 2.6rem;
    font-size: 1.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}