/* ============================================================
   个人技术文档库 — 样式表（零依赖，暗色默认 + 亮色可选）
   ============================================================ */

:root {
  --topbar-h: 3.5rem;
  --sidebar-w: 17rem;
  --toc-w: 14rem;
  --content-w: 48rem;
  /* 宽版页面（front matter: wide: true）：正文与整页外壳一起放宽 */
  --content-w-wide: 72rem;
  --layout-w-wide: 112rem;

  --bg: #0b1020;
  --bg-soft: #0f1730;
  --bg-elev: #121c38;
  --border: #24304f;
  --text: #dbe3f4;
  --text-dim: #93a0bd;
  --text-faint: #6b7899;
  --accent: #5eead4;
  --accent-soft: rgba(94, 234, 212, .12);
  --link: #7dd3fc;
  --code-bg: #0a1122;
  --mark: rgba(250, 204, 21, .28);
  --shadow: 0 1rem 3rem rgb(0 0 0 / 45%);
  --radius: .75rem;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei",
          "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Consolas,
          "Cascadia Mono", Menlo, monospace;
}

[data-theme="light"] {
  --bg: #f7f9fc;
  --bg-soft: #eef2f9;
  --bg-elev: #ffffff;
  --border: #dde4f0;
  --text: #1a2233;
  --text-dim: #5a6780;
  --text-faint: #8894ab;
  --accent: #0d9488;
  --accent-soft: rgba(13, 148, 136, .1);
  --link: #0369a1;
  --code-bg: #f1f5fb;
  --mark: rgba(250, 204, 21, .45);
  --shadow: 0 1rem 3rem rgb(15 23 42 / 12%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 1rem); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: #04201c; padding: .5rem 1rem;
  border-radius: 0 0 .5rem 0; font-weight: 700;
}
.skip-link:focus { left: 0; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: .75rem;
  height: var(--topbar-h); padding: 0 1rem;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: .5rem;
  font-weight: 800; color: var(--text); white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--accent); }
.brand-text { letter-spacing: .01em; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 2.25rem; height: 2.25rem; flex: none;
  background: transparent; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: .55rem;
  font-size: 1.05rem; cursor: pointer; transition: .15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.nav-toggle { display: none; }

.search { position: relative; margin-left: auto; width: min(24rem, 45vw); }
.search-icon {
  position: absolute; left: .7rem; top: 50%; transform: translateY(-50%);
  width: 1.05rem; height: 1.05rem; fill: none; stroke: var(--text-faint);
  stroke-width: 1.6; stroke-linecap: round; pointer-events: none;
}
#search-input {
  width: 100%; height: 2.25rem; padding: 0 .8rem 0 2.2rem;
  background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--border); border-radius: .6rem;
  font: inherit; font-size: .92rem; outline: none; transition: .15s;
}
#search-input::placeholder { color: var(--text-faint); }
#search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.search-results {
  position: absolute; top: calc(100% + .5rem); left: 0; right: 0;
  max-height: min(60vh, 26rem); overflow-y: auto;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: .4rem;
}
.search-results .sr-item {
  display: block; padding: .55rem .7rem; border-radius: .5rem; color: var(--text);
}
.search-results .sr-item:hover, .search-results .sr-item.is-active {
  background: var(--accent-soft); text-decoration: none;
}
.search-results .sr-title { font-weight: 700; font-size: .93rem; }
.search-results .sr-meta { font-size: .76rem; color: var(--text-faint); margin-top: .1rem; }
.search-results .sr-snippet { font-size: .82rem; color: var(--text-dim); margin-top: .2rem; }
.search-results mark { background: var(--mark); color: inherit; border-radius: .2rem; padding: 0 .1rem; }
.search-empty { padding: .8rem; color: var(--text-faint); font-size: .88rem; text-align: center; }

/* ---------- layout ---------- */
.layout {
  display: grid; gap: 2rem;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  max-width: 96rem; margin: 0 auto; padding: 1.75rem 1.5rem 4rem;
}

/* ---------- sidebar ---------- */
.sidebar {
  position: sticky; top: calc(var(--topbar-h) + 1.25rem);
  align-self: start; max-height: calc(100vh - var(--topbar-h) - 2.5rem);
  overflow-y: auto; padding-right: .35rem;
}
.nav-group + .nav-group { margin-top: 1.1rem; }
.nav-group-title {
  font-size: .74rem; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-faint);
  padding: 0 .6rem .35rem;
}
.nav ul { list-style: none; margin: 0; padding: 0; }
.nav a {
  display: block; padding: .34rem .6rem; border-radius: .5rem;
  color: var(--text-dim); font-size: .9rem; line-height: 1.5;
  border-left: 2px solid transparent;
}
.nav a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav a.active {
  background: var(--accent-soft); color: var(--accent);
  border-left-color: var(--accent); font-weight: 700;
}
/* 侧边栏里指向独立页面的条目，带一个小徽标以示区别（文字取 data-badge；配置里 badge 留空则不显示） */
.nav a.nav-app[data-badge]::after {
  content: attr(data-badge); margin-left: .45em; font-size: .62em; letter-spacing: .06em;
  text-transform: uppercase; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: .3em; padding: .05em .35em;
  vertical-align: .12em;
}
/* 分组内小标题（如 Learn Claude Code） */
.nav li.nav-sub {
  padding: .55rem .6rem .15rem;
  font-size: .7rem; font-weight: 800; letter-spacing: .08em;
  color: var(--text-faint);
}
/* 可折叠的父子导航 */
.nav .nav-parent-row { display: flex; align-items: center; }
.nav .nav-parent-row > a { flex: 1; min-width: 0; }
.nav .nav-caret {
  flex: none; width: 1.5rem; height: 1.5rem; display: inline-grid; place-items: center;
  background: transparent; border: 0; color: var(--text-faint); cursor: pointer;
  font-size: .78rem; border-radius: .35rem;
  transition: transform .15s, color .15s, background .15s;
}
.nav .nav-caret:hover { color: var(--accent); background: var(--accent-soft); }
.nav li.nav-parent.open > .nav-parent-row > .nav-caret { transform: rotate(90deg); }
.nav ul.nav-children {
  display: none; margin: .15rem 0 .25rem .5rem;
  padding-left: .5rem; border-left: 1px solid var(--border);
}
.nav li.nav-parent.open > ul.nav-children { display: block; }
.nav ul.nav-children a { font-size: .85rem; padding: .26rem .5rem; }



/* ---------- content ---------- */
.content { min-width: 0; max-width: var(--content-w); }
/* 宽版页面：外壳与正文一起放宽（见 front matter wide: true） */
.layout.is-wide { max-width: var(--layout-w-wide); }
.content.is-wide { max-width: var(--content-w-wide); }
.doc h1 { font-size: 2.05rem; line-height: 1.25; margin: 0 0 1rem; letter-spacing: -.015em; }
.doc h2 {
  font-size: 1.4rem; margin: 2.4rem 0 .85rem;
  padding-bottom: .4rem; border-bottom: 1px solid var(--border);
}
.doc h3 { font-size: 1.15rem; margin: 1.8rem 0 .6rem; }
.doc h4 { font-size: 1rem; margin: 1.4rem 0 .5rem; color: var(--text-dim); }
.doc p { margin: 0 0 1rem; }
.doc ul, .doc ol { margin: 0 0 1rem; padding-left: 1.4rem; }
.doc li { margin: .3rem 0; }
.doc li > ul, .doc li > ol { margin: .3rem 0 .1rem; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 2.2rem 0; }
.doc img { max-width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); }
.doc blockquote {
  margin: 0 0 1rem; padding: .7rem 1rem; color: var(--text-dim);
  background: var(--bg-soft); border-left: 3px solid var(--accent);
  border-radius: 0 .5rem .5rem 0;
}
.doc blockquote p:last-child { margin-bottom: 0; }

.anchor {
  float: left; margin-left: -1.15em; width: 1em;
  color: var(--text-faint); opacity: 0; font-weight: 400; text-decoration: none;
}
.doc h2:hover .anchor, .doc h3:hover .anchor, .doc h4:hover .anchor { opacity: .7; }

.doc code {
  font-family: var(--mono); font-size: .87em;
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: .3rem; padding: .1rem .35rem;
}
.code-block { position: relative; margin: 0 0 1.15rem; }
.code-block pre {
  margin: 0; padding: 1rem 1.1rem; overflow-x: auto;
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.code-block code {
  background: none; border: 0; padding: 0;
  font-size: .86rem; line-height: 1.65;
}
.copy-btn {
  position: absolute; top: .5rem; right: .5rem; z-index: 2;
  padding: .18rem .55rem; font-size: .72rem; font-family: var(--font);
  color: var(--text-dim); background: var(--bg-elev);
  border: 1px solid var(--border); border-radius: .4rem;
  cursor: pointer; opacity: 0; transition: .15s;
}
.code-block:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.copy-btn.done { color: var(--accent); border-color: var(--accent); }

.table-wrap { overflow-x: auto; margin: 0 0 1.15rem; }
.doc table { border-collapse: collapse; width: 100%; font-size: .9rem; }
.doc th, .doc td {
  border: 1px solid var(--border); padding: .5rem .7rem; text-align: left; vertical-align: top;
}
.doc th { background: var(--bg-soft); font-weight: 700; }

.doc-meta {
  margin-top: 2.5rem; padding-top: .9rem; border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--text-faint);
}

/* ---------- pager ---------- */
.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2rem 0 0;
}
.pager a {
  display: flex; flex-direction: column; gap: .15rem;
  padding: .7rem .9rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-soft);
  font-weight: 700; font-size: .92rem; color: var(--text);
}
.pager a:hover { border-color: var(--accent); text-decoration: none; background: var(--accent-soft); }
.pager a span { font-size: .72rem; font-weight: 600; color: var(--text-faint); }
.pager-next { text-align: right; }

.site-footer {
  margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--text-faint);
}

/* ---------- toc ---------- */
.toc {
  position: sticky; top: calc(var(--topbar-h) + 1.25rem);
  align-self: start; max-height: calc(100vh - var(--topbar-h) - 2.5rem);
  overflow-y: auto; font-size: .84rem; display: none;
}
.toc-title {
  font-size: .72rem; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: .5rem;
}
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a {
  display: block; padding: .22rem .6rem; color: var(--text-faint);
  border-left: 2px solid transparent; margin-left: -1px; line-height: 1.5;
}
.toc a:hover { color: var(--text); text-decoration: none; }
.toc .lvl-3 a { padding-left: 1.3rem; font-size: .8rem; }
.toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* ---------- 首页自动总览（build.py: front matter `home: auto`） ---------- */
.home-title { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .5rem; letter-spacing: -.015em; }
.home-sub { font-size: 1rem; color: var(--text-dim); margin: 0 0 .4rem; }
.home-sub span { display: block; }  /* 每行一条：中英双语副标题各占一行 */
.home-stats { font-size: .8rem; color: var(--text-faint); margin: 0 0 1.4rem; }
/* 顶部 hero 横幅：用户照片作背景，半透明（::before 的 opacity）+ 向页面底色渐隐（::after），
   两层都在文字之下（z-index 负值 + isolation），保证明暗两套主题下标题都清晰可读。
   换图：直接替换 static/home-hero.jpg（同名即可，无需改代码）。 */
.home-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 17rem;
  margin: 0 0 1.8rem;
  padding: 2rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("home-hero.jpg?v=383fdec5") center 24% / cover no-repeat;
  opacity: .42;  /* 半透明 */
}
/* 图里的主体（人物）在画面 3/4 处。hero 宽度 < 图片按高度铺满后的宽度（≈546px）时
   cover 改为横向裁切，居中裁会把人物右半边切掉 —— 窄屏把可视窗口贴到右边缘，
   人物就完整入镜（此时约落在 56%~64% 处）。宽屏不受影响（仍为 75% 处）。 */
@media (max-width: 570px) {
  .home-hero::before { background-position: 100% 24%; }
}
.home-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--bg) 40%, transparent) 0%,
    color-mix(in srgb, var(--bg) 58%, transparent) 62%,
    var(--bg) 100%);
}
.home-hero .home-stats { margin-bottom: 0; }
.cards {
  display: grid; gap: .8rem; margin: 0 0 1.2rem;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
}
.card {
  display: flex; flex-direction: column; gap: .35rem;
  padding: .85rem .95rem; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-soft); color: var(--text); text-decoration: none;
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
}
.card:hover {
  border-color: var(--accent); background: var(--accent-soft);
  text-decoration: none; transform: translateY(-1px);
}
.card-title { font-weight: 700; font-size: .95rem; }
.card-desc { margin: 0; font-size: .82rem; line-height: 1.5; color: var(--text-dim); }
.card-foot {
  display: flex; align-items: center; gap: .5rem; margin-top: auto;
  font-size: .74rem; color: var(--text-faint);
}
.card-kind {
  padding: .05rem .45rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.home-recent { list-style: none; margin: 0; padding: 0; }
.home-recent li {
  display: flex; align-items: baseline; gap: .75rem;
  padding: .35rem 0; border-bottom: 1px dashed var(--border); font-size: .9rem;
}
.home-recent li:last-child { border-bottom: 0; }
.home-date { margin-left: auto; font-size: .76rem; color: var(--text-faint); font-variant-numeric: tabular-nums; }

/* ---------- responsive ---------- */
@media (min-width: 1280px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w); }
  .toc { display: block; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-grid; }
  .layout { grid-template-columns: minmax(0, 1fr); padding: 1.25rem 1rem 3rem; }
  .sidebar {
    position: fixed; top: var(--topbar-h); left: 0; bottom: 0; z-index: 45;
    width: min(84vw, var(--sidebar-w)); max-height: none;
    padding: 1.1rem 1rem 2rem; background: var(--bg-elev);
    border-right: 1px solid var(--border);
    transform: translateX(-102%); transition: transform .22s ease;
  }
  .sidebar.open { transform: none; box-shadow: var(--shadow); }
  .scrim {
    position: fixed; inset: var(--topbar-h) 0 0; z-index: 44;
    background: rgb(0 0 0 / 45%);
  }
  .search { width: auto; flex: 1; }
  .brand-text { display: none; }
  .doc h1 { font-size: 1.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}