/* ==========================================================================
   Documentation theme (inspired by Godot Docs / the dark Read the Docs theme).
   Every color lives in a variable: change the palette here and you're done.
   ========================================================================== */

:root,
:root[data-theme="dark"] {
  --bg-page: #1c1e20;
  --bg-sidebar: #25282c;
  --bg-content: #2c3034;
  --bg-input: #33373c;
  --bg-code: #22252a;
  --bg-hover: #30343a;
  --bg-section-open: #3a2d33;

  --text: #d8dbde;
  --text-strong: #ffffff;
  --text-muted: #9aa1a8;
  --border: #3d4248;

  --accent: #ff5d7d;        /* menu section titles */
  --link: #62b4f5;
  --link-hover: #9ad0fa;

  --tile-green: #1e7a36;
  --tile-teal: #0e7c74;
  --tile-blue: #1f3d9e;
  --tile-red: #8c1b4b;

  /* Admonitions: [body background, title background, text] */
  --note-bg: #2a3a4d;   --note-head: #355979;   --note-text: #7fc4ff;
  --tip-bg: #25402f;    --tip-head: #2f6a45;    --tip-text: #7fe0a3;
  --important-bg: #3c3254; --important-head: #5a4890; --important-text: #c4aaff;
  --warning-bg: #4a3b21; --warning-head: #8a6a1c; --warning-text: #ffd36b;
  --caution-bg: #4a2a2a; --caution-head: #8e3434; --caution-text: #ff9a9a;

  /* Code highlighting */
  --hl-comment: #7f8892;
  --hl-keyword: #ff7ab2;
  --hl-string: #8fd694;
  --hl-number: #f2b66d;
  --hl-title: #7cc1ff;
  --hl-type: #c8a2ff;
  --hl-meta: #9aa1a8;

  --shadow: 0 2px 10px rgba(0, 0, 0, .35);
}

:root[data-theme="light"] {
  --bg-page: #e9ecef;
  --bg-sidebar: #f4f6f8;
  --bg-content: #ffffff;
  --bg-input: #e3e7eb;
  --bg-code: #f3f5f7;
  --bg-hover: #e6eaee;
  --bg-section-open: #fbe3e9;

  --text: #2b3036;
  --text-strong: #000000;
  --text-muted: #5f6872;
  --border: #d3d8de;

  --accent: #d6285a;
  --link: #1c6fc2;
  --link-hover: #0f4f95;

  --note-bg: #e8f1fb;   --note-head: #cfe3f8; --note-text: #1b5a9a;
  --tip-bg: #e6f6ec;    --tip-head: #c8ecd6;  --tip-text: #1c7340;
  --important-bg: #efe9fb; --important-head: #dccff6; --important-text: #5a3cb0;
  --warning-bg: #fdf3dc; --warning-head: #f8e2a8; --warning-text: #8a5d00;
  --caution-bg: #fbe8e8; --caution-head: #f4c9c9; --caution-text: #a02828;

  --hl-comment: #6a737d;
  --hl-keyword: #c2185b;
  --hl-string: #2a7d34;
  --hl-number: #b35c00;
  --hl-title: #0b6bcb;
  --hl-type: #6f42c1;
  --hl-meta: #6a737d;

  --shadow: 0 2px 10px rgba(0, 0, 0, .12);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text);
  font: 16px/1.7 "Noto Sans", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }
button { font: inherit; color: inherit; cursor: pointer; }

/* --------------------------------------------------------------------------
   Layout: fixed sidebar + content column (like Read the Docs)
   -------------------------------------------------------------------------- */
.layout {
  display: flex;
  max-width: 1310px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg-content);
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: flex-start;
  flex: 0 0 328px;
  width: 328px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-sidebar);
}
.content {
  flex: 1 1 auto;
  min-width: 0;
  padding: 36px 56px 60px;
  background: var(--bg-content);
}

.topbar, .backdrop { display: none; }

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar-head { padding: 24px 15px 14px; }
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 62px;
  margin-bottom: 18px;
  padding: 0 4px;
  color: var(--text-strong);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none !important;
}
.brand:hover { color: var(--text-strong); }
.brand img { max-height: 62px; max-width: 100%; display: block; }
.brand .brand-mark {
  flex: none;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
}
.search input {
  width: 100%;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--bg-input);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  outline: none;
}
.search input::placeholder { color: var(--text-muted); }
.search input:focus { border-color: var(--accent); }

.sidebar-body { flex: 1; overflow-y: auto; padding-bottom: 20px; overscroll-behavior: contain; }
.sidebar-body::-webkit-scrollbar { width: 8px; }
.sidebar-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* The menu is built from native <details>/<summary>, so it opens and closes without JavaScript. */
.nav-section { margin-bottom: 6px; }
.nav-section-title {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  list-style: none;
  cursor: pointer;
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.nav-section-title::-webkit-details-marker, .nav-row::-webkit-details-marker { display: none; }
.nav-section-title::before {
  content: "❯";
  display: inline-block;
  font-size: 12px;
  transition: transform .15s;
}
.nav-section[open] > .nav-section-title { background: var(--bg-section-open); margin-bottom: 4px; }
.nav-section[open] > .nav-section-title::before { transform: rotate(90deg); }

.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-row { display: flex; align-items: center; }
summary.nav-row { list-style: none; cursor: pointer; }
.nav-link {
  flex: 1;
  display: block;
  padding: 5px 20px 5px 20px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none !important;
}
.nav-label { cursor: pointer; }
a.nav-link:hover { background: var(--bg-hover); color: var(--text-strong); }
.nav-link.active { color: var(--text-strong); font-weight: 700; background: var(--bg-hover); box-shadow: inset 3px 0 0 var(--accent); }

/* Expander box (+ / −) for groups of pages */
.has-children > details > summary::before {
  content: "+";
  flex: none;
  width: 14px; height: 14px;
  margin-left: 15px; margin-right: -12px;
  border: 1px solid var(--text-muted);
  border-radius: 2px;
  color: var(--text-muted);
  font-size: 12px; line-height: 12px; text-align: center;
}
.has-children > details[open] > summary::before { content: "−"; }
.has-children > details > summary .nav-link { padding-left: 24px; }
.nav-list .nav-list .nav-link { padding-left: 40px; font-size: 14.5px; }

.sidebar-foot {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-hover);
  color: var(--text-muted);
  font-size: 14px;
}
.theme-btn {
  padding: 2px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  font-size: 13px;
}
.theme-btn:hover { color: var(--text-strong); border-color: var(--text-muted); }

.lang-switch { margin-left: 8px; }
.lang-switch a, .lang-switch .current {
  display: inline-block;
  padding: 0 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}
.lang-switch a { color: var(--text-muted); }
.lang-switch a:hover { color: var(--text-strong); text-decoration: none; }
.lang-switch .current { color: var(--accent); }

/* Search results */
.results { padding: 4px 12px 16px; }
.result {
  display: block;
  padding: 10px 12px;
  margin: 2px 0;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none !important;
}
.result:hover, .result.sel { background: var(--bg-hover); }
.result-title { color: var(--link); font-weight: 700; font-size: 15px; }
.result-where { color: var(--text-muted); font-size: 12px; }
.result-snippet { color: var(--text-muted); font-size: 13px; line-height: 1.45; margin-top: 2px; }
.result mark { background: transparent; color: var(--accent); font-weight: 700; }
.results-empty { padding: 16px 20px; color: var(--text-muted); font-size: 14px; }

/* --------------------------------------------------------------------------
   Content header (breadcrumb + GitHub links)
   -------------------------------------------------------------------------- */
.content-head {
  display: flex; justify-content: space-between; gap: 24px;
  padding-bottom: 18px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--border);
}
.site-subtitle { color: var(--text-strong); font-weight: 700; font-size: 18px; }
.breadcrumb { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; color: var(--text-muted); font-size: 16px; }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--text-muted); }
.breadcrumb a { color: var(--link); }
.head-links { text-align: right; font-size: 16px; line-height: 1.5; white-space: nowrap; }
.head-links .small { display: block; font-size: 14px; }

/* --------------------------------------------------------------------------
   Markdown content
   -------------------------------------------------------------------------- */
.doc { max-width: 100%; overflow-wrap: break-word; }
.doc > :first-child { margin-top: 0; }
.doc h1, .doc h2, .doc h3, .doc h4, .doc h5, .doc h6 {
  color: var(--text-strong);
  line-height: 1.3;
  font-weight: 700;
  scroll-margin-top: 20px;
  position: relative;
}
.doc h1 { font-size: 2.15rem; margin: 0 0 1.1rem; }
.doc h2 { font-size: 1.7rem; margin: 2.2rem 0 1rem; }
.doc h3 { font-size: 1.35rem; margin: 1.8rem 0 .8rem; }
.doc h4 { font-size: 1.1rem; margin: 1.5rem 0 .6rem; }
.doc p, .doc ul, .doc ol, .doc blockquote, .doc table, .doc pre { margin: 0 0 1.1rem; }
.doc ul, .doc ol { padding-left: 1.6rem; }
.doc li + li { margin-top: .25rem; }
.doc li > ul, .doc li > ol { margin: .25rem 0 0; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
.doc img { max-width: 100%; height: auto; border-radius: 4px; }
.doc strong { color: var(--text-strong); }

.doc .anchor {
  position: absolute; left: -1.1em; top: 0;
  width: 1em; text-align: center;
  color: var(--text-muted); opacity: 0; text-decoration: none !important;
  font-weight: 400;
}
.doc :is(h1,h2,h3,h4,h5,h6):hover .anchor { opacity: 1; }

.doc a.external::after {
  content: "";
  display: inline-block;
  width: .7em; height: .7em;
  margin-left: .2em;
  vertical-align: baseline;
  background: currentColor;
  opacity: .8;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M9 1h6v6h-2V4.4L7.7 9.7 6.3 8.3 11.6 3H9V1zM2 3h4v2H4v7h7v-2h2v4H2V3z'/></svg>") center / contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M9 1h6v6h-2V4.4L7.7 9.7 6.3 8.3 11.6 3H9V1zM2 3h4v2H4v7h7v-2h2v4H2V3z'/></svg>") center / contain no-repeat;
}

.doc code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  color: var(--text-strong);
  font: 0.88em/1.4 ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}
.code-block { position: relative; margin: 0 0 1.1rem; }
.code-block pre { margin: 0; }
.doc pre {
  padding: 14px 16px;
  overflow-x: auto;
  border-radius: 6px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  line-height: 1.5;
}
.doc pre code { padding: 0; border: 0; background: transparent; font-size: .88rem; color: var(--text); }
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  padding: 2px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-sidebar);
  color: var(--text-muted);
  font-size: 12px;
  opacity: 0;
  transition: opacity .15s;
}
html:not(.js) .copy-btn { display: none; }
.code-block:hover .copy-btn, .copy-btn:focus { opacity: 1; }
.copy-btn:hover { color: var(--text-strong); }

.hljs-comment, .hljs-quote { color: var(--hl-comment); font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-literal, .hljs-built_in, .hljs-name { color: var(--hl-keyword); }
.hljs-string, .hljs-regexp, .hljs-addition, .hljs-attr, .hljs-template-variable { color: var(--hl-string); }
.hljs-number, .hljs-symbol, .hljs-bullet, .hljs-variable { color: var(--hl-number); }
.hljs-title, .hljs-section, .hljs-function .hljs-title { color: var(--hl-title); }
.hljs-type, .hljs-class .hljs-title, .hljs-attribute, .hljs-params { color: var(--hl-type); }
.hljs-meta, .hljs-deletion { color: var(--hl-meta); }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

.table-wrap { overflow-x: auto; margin: 0 0 1.1rem; }
.doc table { border-collapse: collapse; width: 100%; margin: 0; }
.doc th, .doc td { padding: 8px 12px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
.doc th { background: var(--bg-hover); color: var(--text-strong); }
.doc tbody tr:nth-child(even) { background: color-mix(in srgb, var(--bg-hover) 45%, transparent); }

.doc blockquote:not(.admonition) {
  padding: 4px 16px;
  border-left: 4px solid var(--border);
  color: var(--text-muted);
}
.doc blockquote > :last-child { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   Admonitions: > [!NOTE] / [!TIP] / [!IMPORTANT] / [!WARNING] / [!CAUTION]
   -------------------------------------------------------------------------- */
.admonition {
  margin: 0 0 1.4rem;
  border-radius: 3px;
  box-shadow: var(--shadow);
  overflow: hidden;
  --a-bg: var(--note-bg); --a-head: var(--note-head); --a-text: var(--note-text);
}
.admonition.tip       { --a-bg: var(--tip-bg);       --a-head: var(--tip-head);       --a-text: var(--tip-text); }
.admonition.important { --a-bg: var(--important-bg); --a-head: var(--important-head); --a-text: var(--important-text); }
.admonition.warning   { --a-bg: var(--warning-bg);   --a-head: var(--warning-head);   --a-text: var(--warning-text); }
.admonition.caution   { --a-bg: var(--caution-bg);   --a-head: var(--caution-head);   --a-text: var(--caution-text); }
.admonition-title {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 16px;
  background: var(--a-head);
  color: var(--text-strong);
  font-weight: 700;
}
.admonition-title .ico {
  width: 18px; height: 18px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: currentColor;
  font-size: 12px; line-height: 1;
}
.admonition-title .ico span { color: var(--a-head); font-weight: 800; }
.admonition-body { padding: 12px 16px; background: var(--a-bg); color: var(--a-text); }
.admonition-body > :last-child { margin-bottom: 0; }
.admonition-body code { color: var(--a-text); }
.admonition-body a { color: inherit; text-decoration: underline; }

/* --------------------------------------------------------------------------
   Home page tiles (written as HTML inside the .md)
   <div class="tiles"><a class="tile green" href="path/to/page.md">…</a></div>
   -------------------------------------------------------------------------- */
.doc .tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin: 1.4rem 0; }
.doc .tile {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 76px;
  padding: 12px 16px;
  border-radius: 4px;
  background: var(--tile-green);
  color: #fff;
  text-align: center;
  line-height: 1.4;
  text-decoration: none !important;
  transition: filter .15s, transform .15s;
}
.doc .tile:hover { filter: brightness(1.15); color: #fff; transform: translateY(-1px); }
.doc .tile strong { color: #fff; }
.doc .tile.teal { background: var(--tile-teal); }
.doc .tile.blue { background: var(--tile-blue); }
.doc .tile.red  { background: var(--tile-red); }

/* --------------------------------------------------------------------------
   Previous / next pager and footer
   -------------------------------------------------------------------------- */
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--border); }
.pager:empty { display: none; }
.pager a {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-weight: 600;
}
.pager a:hover { background: var(--bg-hover); text-decoration: none; }
.pager .next { margin-left: auto; text-align: right; }
.site-footer { margin-top: 2rem; color: var(--text-muted); font-size: 14px; }

/* --------------------------------------------------------------------------
   Accessibility and no-JavaScript fallbacks
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute; left: 8px; top: -48px; z-index: 100;
  padding: 8px 14px;
  border-radius: 4px;
  background: var(--accent); color: #fff;
  font-weight: 700;
}
.skip-link:focus { top: 8px; color: #fff; text-decoration: none; }
html:not(.js) .search, html:not(.js) .theme-btn, html:not(.js) .icon-btn { display: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --------------------------------------------------------------------------
   Mobile / tablet
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .topbar {
    position: sticky; top: 0; z-index: 30;
    display: flex; align-items: center; gap: 12px;
    padding: 10px 16px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
  }
  .topbar-title { color: var(--text-strong); font-weight: 800; }
  .icon-btn { border: 0; background: transparent; font-size: 22px; line-height: 1; padding: 2px 6px; }
  .layout { display: block; }
  .sidebar {
    position: fixed; z-index: 50; left: 0; top: 0;
    width: min(328px, 88vw); height: 100dvh;
    transform: translateX(-100%);
    transition: transform .2s;
  }
  body.nav-open .sidebar { transform: none; box-shadow: var(--shadow); }
  body.nav-open .backdrop { display: block; position: fixed; inset: 0; z-index: 40; background: rgba(0, 0, 0, .5); }
  .content { padding: 24px 16px 48px; }
  .content-head { flex-direction: column; gap: 10px; }
  .head-links { text-align: left; white-space: normal; }
  .doc .tiles { grid-template-columns: 1fr; }
  .doc .anchor { display: none; }
  html:not(.js) .sidebar { position: static; transform: none; width: auto; height: auto; }
  html:not(.js) .sidebar-body { overflow: visible; }
}

@media print {
  .sidebar, .topbar, .head-links, .pager, .copy-btn, .skip-link { display: none !important; }
  .layout { display: block; }
  body, .content { background: #fff; color: #000; }
}