/* Vitro docs 本地预览样式
 * 目标：对齐 GitHub 仓库文件视图的 Markdown 排版（github-markdown-css 的取值口径）。
 * 明暗双主题通过 html[data-color-mode] 切换；默认跟随系统。
 */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans CJK SC",
    "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono",
    "DejaVu Sans Mono", "Microsoft YaHei Mono", monospace;
  --sidebar-w: 300px;
  --outline-w: 232px;
  --topbar-h: 48px;
  --radius: 6px;
}

html[data-color-mode="light"] {
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --bg-sidebar: #f6f8fa;
  --bg-hover: rgba(208, 215, 222, 0.32);
  --fg: #1f2328;
  --fg-muted: #59636e;
  --fg-subtle: #818b98;
  --border: #d1d9e0;
  --border-strong: #d0d7de;
  --accent: #0969da;
  --accent-subtle: #ddf4ff;
  --code-inline-bg: rgba(129, 139, 152, 0.12);
  --pre-bg: #f6f8fa;
  --mark-bg: #fff8c5;
  --chip-root-bg: #eaeef2; --chip-root-fg: #1f2328;
  --chip-current-bg: #dafbe1; --chip-current-fg: #116329;
  --chip-spec-bg: #ddf4ff; --chip-spec-fg: #0550ae;
  --chip-archive-bg: #eaeef2; --chip-archive-fg: #59636e;
  --chip-warn-bg: #fff1e5; --chip-warn-fg: #953800;
  --shadow: 0 1px 3px rgba(31, 35, 40, 0.06);
  --tok-comment: #6e7781;
  --tok-keyword: #cf222e;
  --tok-type: #953800;
  --tok-string: #0a3069;
  --tok-number: #0550ae;
  --tok-func: #8250df;
  --tok-var: #953800;
  --tok-preproc: #8250df;
  --tok-ins-bg: #dafbe1;
  --tok-del-bg: #ffebe9;
}

html[data-color-mode="dark"] {
  --bg: #0d1117;
  --bg-subtle: #151b23;
  --bg-sidebar: #0d1117;
  --bg-hover: rgba(177, 186, 196, 0.12);
  --fg: #e6edf3;
  --fg-muted: #9198a1;
  --fg-subtle: #6e7681;
  --border: #30363d;
  --border-strong: #30363d;
  --accent: #4493f8;
  --accent-subtle: #121d2f;
  --code-inline-bg: rgba(110, 118, 129, 0.4);
  --pre-bg: #151b23;
  --mark-bg: #514b1a;
  --chip-root-bg: #21262d; --chip-root-fg: #e6edf3;
  --chip-current-bg: #033a16; --chip-current-fg: #7ee787;
  --chip-spec-bg: #0c2d6b; --chip-spec-fg: #79c0ff;
  --chip-archive-bg: #21262d; --chip-archive-fg: #9198a1;
  --chip-warn-bg: #3d2300; --chip-warn-fg: #ffa657;
  --shadow: 0 1px 3px rgba(1, 4, 9, 0.5);
  --tok-comment: #8b949e;
  --tok-keyword: #ff7b72;
  --tok-type: #ffa657;
  --tok-string: #a5d6ff;
  --tok-number: #79c0ff;
  --tok-func: #d2a8ff;
  --tok-var: #ffa657;
  --tok-preproc: #d2a8ff;
  --tok-ins-bg: #033a16;
  --tok-del-bg: #67060c;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

/* ---------------------------------------------------------------- 顶栏 */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.crumbs {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12.5px;
  color: var(--fg-muted);
}

.topbar-search { position: relative; flex: 1; max-width: 380px; }
.topbar-search input {
  width: 100%;
  height: 32px;
  padding: 0 12px;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--fg);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.topbar-search input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg);
}
.topbar-search .search-hits {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
}

.topbar-right { display: flex; align-items: center; gap: 6px; margin-left: auto; }

.icon-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--fg-muted);
  border-radius: var(--radius);
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--fg); }
.icon-btn.gh { font-size: 12px; }

/* ---------------------------------------------------------------- 布局 */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--outline-w);
  align-items: start;
  min-height: calc(100vh - var(--topbar-h));
}
body.outline-off .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
body.outline-off .outline-wrap { display: none; }
body.nav-off .layout { grid-template-columns: minmax(0, 1fr) var(--outline-w); }
body.nav-off .sidebar { display: none; }
body.nav-off.outline-off .layout { grid-template-columns: minmax(0, 1fr); }

/* ---------------------------------------------------------------- 侧栏 */

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow: auto;
  border-right: 1px solid var(--border);
  background: var(--bg-sidebar);
  padding: 0 8px 32px;
}

/* 站点品牌块（参考 tokenizers-moonbit 文档站：侧栏顶部落款） */
.site-brand {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 16px 10px 14px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border);
  margin-bottom: 10px;
}
.brand-link {
  font-size: 17px;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand-link span { color: var(--accent); font-weight: 500; }
.brand-link:hover { color: var(--accent); }
.brand-sub { margin-top: 4px; font-size: 11.5px; color: var(--fg-subtle); }

.search-box { position: sticky; top: 0; z-index: 5; padding: 2px 4px 8px; background: var(--bg-sidebar); }
.search-box input {
  width: 100%;
  height: 30px;
  padding: 0 8px;
  font-size: 12.5px;
  font-family: var(--font-sans);
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.search-box input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.search-hits {
  margin-top: 6px;
  max-height: 46vh;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 4px;
  font-size: 12.5px;
}
.search-hits .hit-group {
  padding: 4px 6px 2px;
  color: var(--fg-subtle);
  font-size: 11px;
  letter-spacing: 0.03em;
}
.search-hits a {
  display: block;
  padding: 4px 6px;
  color: var(--fg);
  text-decoration: none;
  border-radius: 4px;
  line-height: 1.35;
}
.search-hits a:hover { background: var(--bg-hover); }
.search-hits .hit-path { color: var(--fg-subtle); font-size: 11px; font-family: var(--font-mono); }
.search-hits .hit-snip { color: var(--fg-muted); font-size: 11.5px; }
.search-hits mark { background: var(--mark-bg); color: inherit; }
.search-hits .hit-empty { padding: 6px; color: var(--fg-subtle); }

.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-list .nav-list { padding-left: 12px; }

.nav-dir > details > summary {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 13px;
  color: var(--fg);
  list-style: none;
}
.nav-dir > details > summary::-webkit-details-marker { display: none; }
.nav-dir > details > summary::before {
  content: "▸";
  color: var(--fg-subtle);
  font-size: 10px;
  width: 10px;
  flex: 0 0 10px;
  transition: transform 0.12s ease;
}
.nav-dir > details[open] > summary::before { transform: rotate(90deg); }
.nav-dir > details > summary:hover { background: var(--bg-hover); }
.nav-dir-a { color: var(--fg); text-decoration: none; font-weight: 600; }
.nav-dir-a:hover { color: var(--accent); }
.nav-cnt { margin-left: auto; color: var(--fg-subtle); font-size: 11px; font-variant-numeric: tabular-nums; }

.nav-link {
  display: block;
  padding: 4.5px 8px 4.5px 10px;
  margin: 1px 0;
  color: var(--fg-muted);
  text-decoration: none;
  border-radius: 5px;
  border-left: 2px solid transparent;
  font-size: 13px;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-link:hover { background: var(--bg-hover); color: var(--fg); }
.nav-link.is-active {
  color: var(--fg);
  font-weight: 600;
  background: var(--accent-subtle);
  border-left-color: var(--accent);
}
.nav-root-link { font-weight: 600; color: var(--fg); }

/* ---------------------------------------------------------------- 正文 */

.content { min-width: 0; display: flex; flex-direction: column; align-items: center; }

.doc-head, .markdown-body, .doc-foot { width: 100%; max-width: 900px; padding-left: 32px; padding-right: 32px; }

.doc-head { padding-top: 26px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  line-height: 18px;
  border: 1px solid transparent;
}
.chip-root { background: var(--chip-root-bg); color: var(--chip-root-fg); }
.chip-current { background: var(--chip-current-bg); color: var(--chip-current-fg); }
.chip-spec { background: var(--chip-spec-bg); color: var(--chip-spec-fg); }
.chip-archive { background: var(--chip-archive-bg); color: var(--chip-archive-fg); }
.chip-warn { background: var(--chip-warn-bg); color: var(--chip-warn-fg); }
.chip-other { background: var(--chip-root-bg); color: var(--chip-root-fg); }

/* 面包屑（博客式，参考 tokenizers-moonbit）：左侧 accent 竖线装饰 */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 12px;
  margin-bottom: 14px;
  border-left: 3px solid var(--accent);
  font-size: 13px;
}
.breadcrumbs .crumb { color: var(--fg-muted); text-decoration: none; }
.breadcrumbs a.crumb:hover { color: var(--accent); }
.breadcrumbs .crumb-home { color: var(--accent); }
.breadcrumbs .crumb.is-here { color: var(--fg); font-weight: 600; }
.breadcrumbs .crumb-sep { color: var(--fg-subtle); }

/* 文档大标题（自正文 h1 提取，统一博客式排版） */
.doc-title {
  margin: 0 0 14px;
  font-size: 2em;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.doc-title code { font-size: 0.82em; }

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fg-subtle);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.doc-meta .dot { color: var(--border); }
.doc-meta .meta-left, .doc-meta .meta-right { display: inline-flex; align-items: center; gap: 6px; }

.doc-foot {
  margin-top: 48px;
  padding-top: 16px;
  padding-bottom: 64px;
  border-top: 1px solid var(--border);
  color: var(--fg-subtle);
  font-size: 12.5px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
}
.doc-foot .edit-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
}
.doc-foot .edit-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.doc-foot .foot-meta code { font-size: 11.5px; color: var(--fg-muted); }

/* ------------------------------------------------- markdown-body（GitHub 口径） */

.markdown-body {
  padding-top: 28px;
  padding-bottom: 24px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  word-wrap: break-word;
}
.markdown-body > *:first-child { margin-top: 0 !important; }
.markdown-body > *:last-child { margin-bottom: 0 !important; }

.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  margin-top: 24px;
  margin-bottom: 16px;
  font-weight: 600;
  line-height: 1.3;
  scroll-margin-top: calc(var(--topbar-h) + 12px);
}
.markdown-body h1 { font-size: 1.85em; padding-bottom: 0.3em; border-bottom: 1px solid var(--border-strong); }
.markdown-body h2 { font-size: 1.45em; margin-top: 44px; padding-bottom: 0.3em; border-bottom: 1px solid var(--border-strong); }
.markdown-body h3 { font-size: 1.22em; margin-top: 30px; }
.markdown-body h4 { font-size: 1em; margin-top: 24px; }
.markdown-body h5 { font-size: 0.875em; }
.markdown-body h6 { font-size: 0.85em; color: var(--fg-muted); }

.markdown-body p, .markdown-body blockquote, .markdown-body ul,
.markdown-body ol, .markdown-body dl, .markdown-body table,
.markdown-body .table-wrap, .markdown-body pre, .markdown-body details {
  margin-top: 0;
  margin-bottom: 16px;
}

.markdown-body a { color: var(--accent); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }

.markdown-body strong { font-weight: 600; }
.markdown-body em { font-style: italic; }
.markdown-body del { text-decoration: line-through; }

.markdown-body hr {
  height: 0.25em;
  padding: 0;
  margin: 24px 0;
  background-color: var(--border-strong);
  border: 0;
}

.markdown-body blockquote {
  padding: 10px 18px;
  margin-left: 0;
  margin-right: 0;
  color: var(--fg-muted);
  background: var(--bg-subtle);
  border-left: 0.25em solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.markdown-body blockquote > :first-child { margin-top: 0; }
.markdown-body blockquote > :last-child { margin-bottom: 0; }

.markdown-body ul, .markdown-body ol { padding-left: 2em; }
.markdown-body ul ul, .markdown-body ul ol, .markdown-body ol ol, .markdown-body ol ul { margin-top: 0; margin-bottom: 0; }
.markdown-body li + li { margin-top: 0.25em; }
.markdown-body li > p { margin-top: 16px; }
.markdown-body li.task-list-item { list-style-type: none; }
.markdown-body li.task-list-item > input[type="checkbox"] {
  margin: 0 0.35em 0.25em -1.4em;
  vertical-align: middle;
}

.markdown-body code, .markdown-body tt {
  padding: 0.2em 0.4em;
  margin: 0;
  font-size: 85%;
  white-space: break-spaces;
  background-color: var(--code-inline-bg);
  border-radius: var(--radius);
  font-family: var(--font-mono);
}
.markdown-body pre {
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.55;
  background-color: var(--pre-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  word-wrap: normal;
}
.markdown-body pre code {
  padding: 0;
  margin: 0;
  font-size: 100%;
  background: transparent;
  border: 0;
  white-space: pre;
}
.markdown-body pre.code-hl { position: relative; }
.markdown-body pre.code-hl[data-lang]::after {
  content: attr(data-lang);
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 10.5px;
  color: var(--fg-subtle);
  font-family: var(--font-mono);
  pointer-events: none;
  opacity: 0.75;
}

/* 代码高亮 token（与 highlight.go 的 class 一一对应） */
.hl .tok-c { color: var(--tok-comment); }
.hl .tok-k { color: var(--tok-keyword); }
.hl .tok-t { color: var(--tok-type); }
.hl .tok-s { color: var(--tok-string); }
.hl .tok-m { color: var(--tok-number); }
.hl .tok-f { color: var(--tok-func); }
.hl .tok-v { color: var(--tok-var); }
.hl .tok-p { color: var(--tok-preproc); }
.hl .tok-ins { background: var(--tok-ins-bg); }
.hl .tok-del { background: var(--tok-del-bg); }

.markdown-body .table-wrap { overflow-x: auto; }
.markdown-body table {
  border-spacing: 0;
  border-collapse: collapse;
  display: block;
  width: max-content;
  max-width: 100%;
  overflow: auto;
  font-size: 14px;
}
.markdown-body table th { font-weight: 600; background-color: var(--bg-subtle); }
.markdown-body table th, .markdown-body table td {
  padding: 6px 13px;
  border: 1px solid var(--border-strong);
}
.markdown-body table tr { background-color: var(--bg); border-top: 1px solid var(--border-strong); }
.markdown-body table tr:nth-child(2n) { background-color: var(--bg-subtle); }
.markdown-body table td.col-m { color: var(--fg-muted); white-space: nowrap; }
.markdown-body table td.col-n { font-family: var(--font-mono); font-size: 12.5px; }

.markdown-body details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
}
.markdown-body details > summary { cursor: pointer; font-weight: 600; }

.markdown-body kbd {
  display: inline-block;
  padding: 3px 5px;
  font-size: 11px;
  line-height: 10px;
  color: var(--fg);
  vertical-align: middle;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: inset 0 -1px 0 var(--border-strong);
  font-family: var(--font-mono);
}

.markdown-body img { max-width: 100%; box-sizing: content-box; }

.markdown-body sub, .markdown-body sup { font-size: 75%; }

.markdown-body input[type="checkbox"] { accent-color: var(--accent); }

/* 检索命中高亮 */
.markdown-body mark.search-hit { background: var(--mark-bg); color: inherit; border-radius: 2px; }

/* 指向仓库外文件的链接（docs/ 之外的源码、脚本等，只能跳 GitHub） */
.markdown-body a.repo-link::after {
  content: "↗";
  font-size: 10px;
  margin-left: 2px;
  color: var(--fg-subtle);
  vertical-align: super;
}

/* ---------------------------------------------------------------- 打磨层（2026-09-30 视觉批） */

/* 侧边栏：archive 组整体降权（默认折叠已有；再灰化计数与标题） */
.nav-dir details[data-group^="archive"] > summary { color: var(--fg-subtle); }
.nav-dir details[data-group^="archive"] .nav-cnt { opacity: 0.6; }
.nav-dir details[data-group^="archive"] .nav-link { color: var(--fg-subtle); font-size: 12.5px; }

/* 侧边栏目录分组标题（summary）节奏 */
.nav-dir summary {
  padding: 5px 6px;
  border-radius: 5px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}
.nav-dir summary:hover { color: var(--fg); background: var(--bg-hover); }
.nav-dir > details { margin: 6px 0; }

/* 细滚动条（Webkit 系；Firefox 走 scrollbar-width） */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-subtle); }
::-webkit-scrollbar-track { background: transparent; }

::selection { background: var(--accent-subtle); color: var(--fg); }

/* 链接下划线偏移与过渡 */
.markdown-body a { text-underline-offset: 3px; transition: color 0.15s ease; }

/* topbar 毛玻璃 */
.topbar {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* 大纲条目行距放松 */
.outline a { padding: 3.5px 6px; line-height: 1.45; }

/* 平滑主题切换 */
body, .markdown-body, .sidebar, .topbar, .outline-wrap {
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* ---------------------------------------------------------------- 大纲 */

.outline-wrap {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow: auto;
  padding: 22px 16px 40px 8px;
  border-left: 1px solid var(--border);
}
.outline-title { font-size: 11.5px; color: var(--fg-subtle); letter-spacing: 0.06em; margin-bottom: 8px; }
.outline { display: flex; flex-direction: column; gap: 1px; border-left: 1px solid var(--border); }
.outline a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 12.5px;
  line-height: 1.35;
  padding: 3px 6px;
  border-left: 2px solid transparent;
  margin-left: -1px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.outline a:hover { color: var(--fg); }
.outline a.lv2 { padding-left: 16px; }
.outline a.lv3 { padding-left: 28px; font-size: 12px; }
.outline a.is-current { color: var(--fg); font-weight: 600; border-left-color: var(--accent); }
.outline-empty { color: var(--fg-subtle); font-size: 12px; }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 1240px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .outline-wrap { display: none; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    left: 0;
    top: var(--topbar-h);
    width: min(86vw, var(--sidebar-w));
    z-index: 40;
    box-shadow: var(--shadow);
  }
  body.nav-off .sidebar { display: none; }
  body:not(.nav-off) .sidebar { display: block; }
  .doc-head, .markdown-body, .doc-foot { padding-left: 18px; padding-right: 18px; }
  .topbar .crumbs { display: none; }
  .topbar-search { max-width: none; }
}

@media print {
  .topbar, .sidebar, .outline-wrap, .doc-foot { display: none !important; }
  .layout { display: block; }
  .markdown-body { max-width: none; padding: 0; }
  .markdown-body pre, .markdown-body table { break-inside: avoid; }
  .markdown-body a { color: inherit; text-decoration: underline; }
}