/* The landing page's warm ground, cream ink and amber thread, adapted for reading. */
:root {
  --sidebar-target-width: 290px;
  --content-max-width: 790px;
  --menu-bar-height: 64px;
  --page-padding: 32px;
  --mono-font: "Geist Mono", monospace;
  --weft-serif: "Source Serif 4", Georgia, serif;
  --weft-accent: var(--links);
  --weft-line: var(--table-border-color);
  --weft-muted: var(--sidebar-fg);
  --weft-panel: var(--table-alternate-bg);
}

.ayu {
  --bg: #0d0b09;
  --fg: #d9d3c9;
  --sidebar-bg: #13100d;
  --sidebar-fg: #b8aea1;
  --sidebar-active: #f0ad54;
  --sidebar-spacer: #302820;
  --sidebar-header-border-color: #8d642f;
  --sidebar-non-existant: #9a8e7f;
  --links: #edab57;
  --icons: #ab9d8c;
  --icons-hover: #f4f1ea;
  --inline-code-color: #ebbd80;
  --theme-popup-bg: #1d1813;
  --theme-popup-border: #44372b;
  --theme-hover: #30261c;
  --quote-bg: #1c160f;
  --quote-border: #d97706;
  --table-border-color: #332b22;
  --table-header-bg: #211b15;
  --table-alternate-bg: #171310;
  --searchbar-bg: #171310;
  --searchbar-fg: #f4f1ea;
  --searchbar-border-color: #665039;
  --searchbar-shadow-color: transparent;
  --searchresults-header-fg: #b8aea1;
  --searchresults-border-color: #44372b;
  --searchresults-li-bg: #211b15;
  --search-mark-bg: #edab57;
  --scrollbar: #665442;
}

.light {
  --bg: #faf7f1;
  --fg: #342d25;
  --sidebar-bg: #f1ece2;
  --sidebar-fg: #65594b;
  --sidebar-active: #8c480e;
  --sidebar-spacer: #dcd2c3;
  --sidebar-header-border-color: #bc8a48;
  --links: #965018;
  --icons: #786651;
  --icons-hover: #382619;
  --inline-code-color: #814311;
  --theme-popup-bg: #faf7f1;
  --theme-popup-border: #d6c8b6;
  --theme-hover: #eae0d1;
  --quote-bg: #f2e9db;
  --quote-border: #ae650c;
  --table-border-color: #ddd2c2;
  --table-header-bg: #eee5d7;
  --table-alternate-bg: #f3eee5;
  --searchbar-bg: #fffdf8;
  --searchbar-fg: #342d25;
  --searchbar-border-color: #aa8b65;
  --searchbar-shadow-color: transparent;
  --searchresults-header-fg: #65594b;
  --searchresults-border-color: #d6c8b6;
  --searchresults-li-bg: #eee5d7;
  --search-mark-bg: #f2cd90;
  --scrollbar: #b4a48f;
}

body {
  font-family: "Geist", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--search-mark-bg); color: var(--bg); }
.light ::selection, .rust ::selection { color: var(--fg); }
a:focus-visible, button:focus-visible, input:focus-visible,
.icon-button:focus-visible {
  outline: 2px solid var(--weft-accent);
  outline-offset: 4px;
}

/* The desktop masthead stays above the independently scrolling contents. */
.weft-brand {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 101;
  box-sizing: border-box;
  width: var(--sidebar-width);
  height: 88px;
  padding: 16px 26px;
  display: flex;
  align-items: center;
  gap: 15px;
  background: var(--sidebar-bg);
  border-bottom: 1px solid var(--weft-line);
  color: var(--sidebar-fg);
  text-decoration: none;
}
.weft-wordmark {
  font-family: var(--weft-serif);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -1.5px;
}
.weft-wordmark > span { color: var(--sidebar-active); }
.weft-book-label {
  font-family: var(--mono-font);
  font-size: 10px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--weft-muted);
  border-left: 1px solid var(--weft-line);
  padding-left: 15px;
}
#mdbook-sidebar-toggle-anchor:not(:checked) ~ .page-wrapper .weft-brand { display: none; }
.sidebar { border-right: 1px solid var(--weft-line); }
.sidebar .sidebar-scrollbox { top: 88px; padding: 18px 16px 40px; }
.chapter { font-size: 13px; line-height: 1.5; }
.chapter li.chapter-item { margin-top: 2px; }
.chapter li a {
  display: block;
  flex: 1;
  padding: 6px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
}
.chapter li a:hover { background: var(--theme-hover); }
.chapter li a.active {
  background: var(--theme-hover);
  border-left-color: var(--weft-accent);
  font-weight: 600;
}
.chapter li.part-title {
  margin-top: 26px;
  margin-bottom: 9px;
  padding-inline: 12px;
  font-family: var(--mono-font);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--weft-muted);
}
.chapter .section { padding-left: 14px; }

#mdbook-menu-bar {
  border-bottom: 1px solid var(--weft-line);
  background: var(--bg);
}
.menu-title {
  font-family: var(--mono-font);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--icons);
}
.theme-popup { border-radius: 6px; padding: 6px; }
.theme-popup .theme { padding: 8px 14px; }

.content main { padding-top: 42px; padding-bottom: 72px; }
.page-actions {
  float: right;
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  flex-wrap: wrap;
  gap: 6px;
  max-width: 160px;
  margin: 8px 0 12px 20px;
  font-size: 12px;
}
.copy-markdown {
  padding: 7px 12px;
  border: 1px solid var(--weft-line);
  border-radius: 5px;
  background: var(--weft-panel);
  color: var(--fg);
  font: inherit;
  cursor: pointer;
}
.copy-markdown:hover { border-color: var(--links); color: var(--links); }
.copy-markdown-status { color: var(--fg); }
.content h1, .content h2 {
  font-family: var(--weft-serif);
  font-weight: 550;
  line-height: 1.17;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.content h1 { font-size: clamp(36px, 4vw, 52px); margin: 0 0 32px; }
.content h2 {
  font-size: 31px;
  margin-top: 56px;
  padding-top: 25px;
  border-top: 1px solid var(--weft-line);
}
.content h3 { font-size: 20px; line-height: 1.4; margin-top: 32px; font-weight: 600; }
.content h1 .header, .content h2 .header, .content h3 .header { color: var(--fg); }
.ayu .content h1 .header, .ayu .content h2 .header { color: #f4f1ea; }
.content p { margin-block: 1.2em; }
.content p, .content ul, .content ol { line-height: 1.7; }
.content main > h1 + p { font-size: 18px; line-height: 1.7; }
.content li { margin-block: 0.4em; }
.content a:not(.header) { text-underline-offset: 4px; text-decoration-thickness: 1px; }
.content a:not(.header):hover { text-decoration: underline; }
.content hr { margin-block: 38px; background: var(--weft-line); border: 0; height: 1px; }

.content pre {
  margin-block: 26px;
  padding: 20px 22px;
  border: 1px solid var(--weft-line);
  border-radius: 6px;
  background: var(--weft-panel);
  line-height: 1.65;
  overflow-x: auto;
}
.content :not(pre) > code {
  display: inline;
  color: var(--links);
  padding: 0.12em 0.35em;
  border: 1px solid var(--weft-line);
  border-radius: 3px;
  background: var(--weft-panel);
  font-size: 0.85em;
  overflow-wrap: anywhere;
}
.content pre > code { padding: 0; font-size: 13px; background: transparent; }
.content pre > .buttons { opacity: 0.6; }
.content pre:hover > .buttons, .content pre:focus-within > .buttons { opacity: 1; }
.ayu .hljs { color: #ded4c5; }
.ayu .hljs-comment { color: #ab9d8c; }
.ayu .hljs-keyword, .ayu .hljs-type { color: #edab57; }
.ayu .hljs-string { color: #c5c995; }
.ayu .hljs-number, .ayu .hljs-literal { color: #dba586; }
.light .hljs { color: #342d25; }
.light .hljs-comment { color: #736653; }
.light .hljs-keyword, .light .hljs-type { color: #86500e; }
.light .hljs-attr, .light .hljs-meta { color: #994522; }
.light .hljs-string { color: #4b6325; }
.light .hljs-number, .light .hljs-literal { color: #825940; }

.content table { width: 100%; border-collapse: collapse; font-size: 14px; margin-block: 26px; }
.content table th, .content table td {
  padding: 11px 14px;
  vertical-align: top;
  border: 1px solid var(--weft-line);
}
.content table th { text-align: left; font-weight: 600; }
.content blockquote {
  border-left: 2px solid var(--quote-border);
  background: var(--quote-bg);
  padding: 16px 22px;
  margin: 28px 0;
  border-radius: 0 4px 4px 0;
}
.content blockquote > :first-child { margin-top: 0; }
.content blockquote > :last-child { margin-bottom: 0; }
.content img { max-width: 100%; border-radius: 6px; }
.content .checkbox-label { display: block; margin-block: 28px; }
.mermaid { margin-block: 28px; overflow-x: auto; text-align: center; }
#mdbook-searchbar { border-radius: 5px; padding: 14px; font: inherit; }
.nav-chapters { border-radius: 5px; }

/* mdBook translates the page on small screens, which also moves fixed
   descendants. Keep the mobile sidebar entirely within mdBook's nav. */
@media (max-width: 1079px) {
  .weft-brand { display: none; }
  .sidebar .sidebar-scrollbox { top: 0; }
}

@media (max-width: 600px) {
  :root { --page-padding: 22px; --menu-bar-height: 54px; }
  body { font-size: 15px; }
  .content main { padding-top: 28px; padding-bottom: 32px; }
  .content main > h1 + p { font-size: 17px; }
  .content h2 { font-size: 27px; margin-top: 38px; }
  .content pre { padding: 16px; }
  .content table { display: block; overflow-x: auto; }
  .menu-title { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html:not(.sidebar-resizing) .sidebar, .chapter-fold-toggle div { transition: none; }
}

@media print {
  html[class] {
    --bg: #fff;
    --fg: #222;
    --weft-panel: #f7f7f7;
    --weft-line: #ccc;
    --quote-bg: #f7f7f7;
    --quote-border: #777;
    --table-header-bg: #eee;
    --table-alternate-bg: #fff;
    --inline-code-color: #222;
  }
  #mdbook-page-wrapper.page-wrapper {
    margin-inline-start: 0 !important;
    transition: none !important;
  }
  .page { padding: 0; margin-block-start: 0; }
  .weft-brand { display: none; }
  .content main { padding: 0; max-width: none; }
  .page-actions { display: none; }
  .content, .content * { color: #222 !important; }
  .content h1, .content h2, .content h3 { break-after: avoid; }
  .content pre { white-space: pre-wrap; overflow-wrap: anywhere; }
}