/* 生成式软件工程 · 零基础中文讲义 —— 阅读界面样式
   三栏布局：左侧全书目录、中间正文、右侧本页目录 */

:root {
  /* 纸面与墨色 */
  --bg: #fbfaf7;
  --bg-soft: #f4f1ea;
  --bg-code: #f5f2ec;
  --bg-card: #ffffff;
  --fg: #1b1a20;
  --fg-soft: #4b4854;
  --fg-mute: #6f6b7a;
  --border: #e2ddd3;
  --border-soft: #ece7dd;
  --link: #3b34b8;
  --link-hover: #2a248f;
  /* 主色与辅色，用于渐变、强调与装饰 */
  --accent: #4338ca;
  --accent-2: #9333ea;
  --gold: #a16207;
  --glow-1: rgba(67, 56, 202, .07);
  --glow-2: rgba(147, 51, 234, .06);
  --shadow-sm: 0 1px 2px rgba(27, 26, 32, .04);
  --shadow-md: 0 14px 32px -18px rgba(27, 26, 32, .35);
  /* 提示框 */
  --ok-bg: #f1f8f2; --ok-bd: #b7dfc3; --ok-fg: #14683a;
  --info-bg: #f0f3fd; --info-bd: #bcc6f2; --info-fg: #2f2c8f;
  --warn-bg: #fdf7e9; --warn-bd: #ecd8a2; --warn-fg: #7d5306;
  --danger-bg: #fdf0ef; --danger-bd: #efbdb8; --danger-fg: #9b2620;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --sans: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Cascadia Code", monospace;
  --header-h: 58px;
  --radius: 10px;
}

[data-theme="dark"] {
  --bg: #0e0f15;
  --bg-soft: #171923;
  --bg-code: #171923;
  --bg-card: #14161f;
  --fg: #e9e7f0;
  --fg-soft: #b3afc0;
  --fg-mute: #918d9e;
  --border: #2a2d3b;
  --border-soft: #212430;
  --link: #a7b0ff;
  --link-hover: #c9cfff;
  --accent: #8b93ff;
  --accent-2: #c084fc;
  --gold: #e0b062;
  --glow-1: rgba(90, 100, 240, .12);
  --glow-2: rgba(168, 85, 247, .09);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-md: 0 16px 36px -20px rgba(0, 0, 0, .9);
  --ok-bg: #10201a; --ok-bd: #1f5c3c; --ok-fg: #6ee7a8;
  --info-bg: #141a2e; --info-bd: #34418f; --info-fg: #a7b0ff;
  --warn-bg: #211b0d; --warn-bd: #6d5216; --warn-fg: #e8c477;
  --danger-bg: #241214; --danger-bd: #7f2d2a; --danger-fg: #ff9a92;
}

* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body {
  margin: 0; background: transparent; color: var(--fg);
  font-family: var(--sans); font-size: 16px; line-height: 1.85;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
/* 页面顶部的两团柔光，给纸面一点层次 */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(58% 42% at 18% -6%, var(--glow-1), transparent 72%),
    radial-gradient(46% 38% at 86% -4%, var(--glow-2), transparent 74%);
}
::selection { background: color-mix(in srgb, var(--accent) 22%, transparent); }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- 顶部栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  display: flex; align-items: center; gap: 14px; padding: 0 22px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid var(--border-soft);
}
.topbar::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  opacity: .28;
}
.topbar .brand {
  font-family: var(--serif); font-weight: 700; font-size: 16.5px; letter-spacing: .01em;
  color: var(--fg); white-space: nowrap;
}
.topbar .brand:hover { text-decoration: none; color: var(--accent); }
.topbar .topnav { display: flex; gap: 2px; margin-left: 10px; overflow-x: auto; }
.topbar .topnav a {
  position: relative; color: var(--fg-soft); font-size: 13.5px;
  padding: 5px 11px; border-radius: 7px; white-space: nowrap;
  transition: color .18s, background .18s;
}
.topbar .topnav a:hover { background: var(--bg-soft); color: var(--fg); text-decoration: none; }
.topbar .topnav a.cur { color: var(--fg); font-weight: 600; }
.topbar .topnav a.cur::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 0; height: 2px;
  border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.topbar .spacer { flex: 1; }

.search-wrap { position: relative; }
.search-wrap input {
  width: 196px; height: 32px; padding: 0 10px 0 30px; font-size: 13px;
  color: var(--fg); background: var(--bg-soft); border: 1px solid var(--border-soft);
  border-radius: 8px; outline: none; font-family: var(--sans);
  transition: width .2s, border-color .2s, background .2s;
}
.search-wrap input:focus { border-color: var(--accent); background: var(--bg-card); width: 236px; }
.search-wrap .ico { position: absolute; left: 10px; top: 8px; color: var(--fg-mute); font-size: 11.5px; }
.search-results {
  position: absolute; right: 0; top: 40px; width: 330px; max-height: 60vh; overflow-y: auto;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow-md); padding: 6px; display: none;
}
.search-results.open { display: block; }
.search-results a { display: block; padding: 7px 11px; border-radius: 7px; color: var(--fg); font-size: 13.5px; }
.search-results a:hover { background: var(--bg-soft); text-decoration: none; }
.search-results .sr-sec { font-size: 11px; color: var(--fg-mute); padding: 6px 11px 2px; }
.search-results .empty { padding: 12px; color: var(--fg-mute); font-size: 13px; }
.icon-btn {
  width: 32px; height: 32px; border: 1px solid var(--border-soft); background: var(--bg-card);
  color: var(--fg-soft); border-radius: 8px; cursor: pointer; font-size: 13px; line-height: 1;
  transition: color .18s, border-color .18s, transform .18s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); transform: rotate(-12deg); }

/* ---------- 三栏布局 ---------- */
.layout {
  display: grid; grid-template-columns: 240px minmax(0, 700px);
  max-width: 1080px; margin: 0 auto; padding: 0 24px; gap: 44px; justify-content: center;
}
.layout.has-toc { grid-template-columns: 232px minmax(0, 700px) 212px; max-width: 1260px; gap: 40px; justify-content: center; }
.layout.full { grid-template-columns: minmax(0, 1fr); max-width: 880px; }

/* 左侧：全书目录 */
.sidebar {
  position: sticky; top: var(--header-h); align-self: start;
  max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  padding: 26px 4px 48px 0; font-size: 13.5px;
  scrollbar-width: thin;
}
.sidebar::-webkit-scrollbar { width: 5px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.sidebar .nav-group { margin-bottom: 20px; position: relative; }
.sidebar .nav-group > .g-title {
  display: flex; align-items: center; gap: 7px;
  font-size: 11px; font-weight: 700; letter-spacing: .1em;
  color: var(--fg-mute); text-transform: uppercase;
  padding: 3px 8px; margin-bottom: 3px;
}
.sidebar .nav-group > .g-title::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--border); transition: background .2s, box-shadow .2s;
}
.sidebar .nav-group.cur-group > .g-title { color: var(--fg); }
.sidebar .nav-group.cur-group > .g-title::before {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}
.sidebar a.nav-item {
  display: block; padding: 4px 9px; color: var(--fg-soft); border-radius: 7px;
  line-height: 1.5; transition: background .16s, color .16s;
}
.sidebar a.nav-item:hover { background: var(--bg-soft); color: var(--fg); text-decoration: none; }
.sidebar a.nav-item.cur {
  color: var(--accent); font-weight: 600;
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  box-shadow: inset 2px 0 0 var(--accent);
}
.sidebar .nav-item .nn {
  color: var(--fg-soft); font-variant-numeric: tabular-nums; margin-right: 5px;
  font-size: 12px; font-family: var(--serif);
}
.sidebar .nav-item.cur .nn { color: var(--accent); }

/* 右侧：本页目录 */
.toc {
  position: sticky; top: calc(var(--header-h) + 26px); align-self: start;
  max-height: calc(100vh - var(--header-h) - 52px); overflow-y: auto;
  padding: 2px 0 40px; font-size: 13px;
  scrollbar-width: thin;
}
.toc::-webkit-scrollbar { width: 5px; }
.toc::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.toc .toc-title {
  display: block; font-size: 11px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--fg-mute); margin: 0 0 12px 15px;
}
.toc a {
  display: block; position: relative; padding: 5px 6px 5px 15px;
  color: var(--fg-soft); line-height: 1.5; font-size: 13px;
  border-left: 1px solid var(--border-soft);
  transition: color .18s, border-color .18s;
}
.toc a.lv3 { padding-left: 27px; font-size: 12.5px; color: var(--fg-mute); }
.toc a:hover { color: var(--fg); text-decoration: none; border-left-color: var(--fg-mute); }
.toc a.active { color: var(--accent); font-weight: 600; border-left-color: transparent; }
.toc a.active::before {
  content: ""; position: absolute; left: -1px; top: 3px; bottom: 3px; width: 2px;
  border-radius: 2px; background: linear-gradient(180deg, var(--accent), var(--accent-2));
}
.toc a.active::after {
  content: ""; position: absolute; left: -3px; top: 50%; width: 5px; height: 5px;
  margin-top: -2.5px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
/* 窄屏时本页目录折进左栏 */
.toc.toc-inline {
  position: static; max-height: none; overflow: visible; padding: 12px 0 0;
  border-top: 1px solid var(--border-soft); margin-top: 14px;
}
.toc.toc-inline .toc-title { margin-left: 8px; }
.toc.toc-inline a { padding-left: 10px; }
.toc.toc-inline a.lv3 { padding-left: 22px; }

/* ---------- 正文 ---------- */
main.doc { padding: 34px 0 96px; min-width: 0; }
.crumbs {
  font-size: 13px; color: var(--fg-soft); margin-bottom: 14px;
  letter-spacing: .01em;
}
.crumbs a { color: var(--fg-mute); }
.crumbs a:hover { color: var(--accent); text-decoration: none; }
.crumbs .sep { margin: 0 7px; opacity: .6; }
main.doc h1 {
  font-family: var(--serif); font-size: 38px; line-height: 1.28; margin: 0 0 12px;
  font-weight: 700; letter-spacing: -.015em;
}
.lede {
  font-size: 17px; color: var(--fg-soft); margin: 0 0 16px; line-height: 1.7;
  font-family: var(--serif);
}
.lede::before {
  content: ""; display: block; width: 34px; height: 2px; margin-bottom: 14px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}
.meta-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0 4px; }
.chip {
  display: inline-block; font-size: 12.5px; padding: 4px 12px; border-radius: 999px;
  color: var(--fg-soft); background: var(--bg-card); border: 1px solid var(--border);
  transition: color .18s, border-color .18s, box-shadow .18s, transform .18s;
}
.chip:hover {
  color: var(--accent); border-color: var(--accent); text-decoration: none;
  transform: translateY(-1px); box-shadow: var(--shadow-sm);
}
main.doc h2 {
  position: relative; font-family: var(--serif); font-size: 24px; font-weight: 700;
  margin: 52px 0 18px; padding-bottom: 0; letter-spacing: -.01em;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
main.doc h2::after {
  content: ""; display: block; width: 42px; height: 3px; margin-top: 11px;
  border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
main.doc h3 {
  font-size: 17.5px; margin: 30px 0 9px; font-weight: 700;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
main.doc h3::before {
  content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 9px;
  vertical-align: 3px; border-radius: 2px; transform: rotate(45deg);
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); opacity: .75;
}
main.doc p { margin: 12px 0; }
main.doc ul, main.doc ol { padding-left: 24px; margin: 12px 0; }
main.doc li { margin: 5px 0; }
main.doc li > ul, main.doc li > ol { margin: 5px 0; }
main.doc ul > li::marker { color: var(--fg-mute); }
main.doc ol > li::marker { color: var(--accent); font-variant-numeric: tabular-nums; }
strong { color: var(--fg); font-weight: 700; }
code {
  font-family: var(--mono); font-size: .875em; padding: .15em .4em;
  background: var(--bg-code); border: 1px solid var(--border-soft); border-radius: 5px;
  color: color-mix(in srgb, var(--fg) 88%, var(--accent));
}
pre {
  background: var(--bg-code); border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.65;
  box-shadow: var(--shadow-sm);
}
pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
blockquote {
  margin: 18px 0; padding: 2px 0 2px 16px; border-left: 2px solid var(--border);
  color: var(--fg-soft); font-family: var(--serif);
}
table {
  border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 14px;
  display: block; overflow-x: auto;
}
th, td { border: 1px solid var(--border-soft); padding: 8px 12px; text-align: left; vertical-align: top; }
th { background: var(--bg-soft); font-weight: 700; }
tbody tr:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }

/* ---------- 内容组件 ---------- */
.goal-box, .analogy, .warn-box, .keypoint, .try-box, .quote-block, .note-box {
  position: relative; border-radius: var(--radius); padding: 15px 18px 15px 20px;
  margin: 20px 0; font-size: 15px; overflow: hidden;
}
.goal-box { background: var(--info-bg); border: 1px solid var(--info-bd); }
.analogy { background: var(--bg-soft); border: 1px solid var(--border-soft); }
.warn-box { background: var(--warn-bg); border: 1px solid var(--warn-bd); }
.try-box { background: var(--ok-bg); border: 1px solid var(--ok-bd); }
.keypoint { background: var(--bg-card); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.quote-block { background: transparent; border-left: 2px solid var(--border); color: var(--fg-soft); }
.goal-box::before, .warn-box::before, .try-box::before, .keypoint::before, .analogy::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
}
.goal-box::before { background: linear-gradient(180deg, var(--info-fg), var(--accent-2)); }
.analogy::before { background: linear-gradient(180deg, var(--border), var(--fg-mute)); }
.warn-box::before { background: linear-gradient(180deg, var(--warn-fg), var(--gold)); }
.try-box::before { background: linear-gradient(180deg, var(--ok-fg), var(--accent-2)); }
.keypoint::before { background: linear-gradient(180deg, var(--accent), var(--accent-2)); }
.quote-block .quote-src { display: block; margin-top: 8px; font-size: 12.5px; color: var(--fg-mute); font-family: var(--sans); }
.goal-box .box-tag, .analogy .box-tag, .warn-box .box-tag,
.keypoint .box-tag, .try-box .box-tag {
  display: block; font-weight: 700; font-size: 12px; margin-bottom: 6px;
  letter-spacing: .08em;
}
.goal-box .box-tag { color: var(--info-fg); }
.analogy .box-tag { color: var(--fg-soft); }
.warn-box .box-tag { color: var(--warn-fg); }
.try-box .box-tag { color: var(--ok-fg); }
.keypoint .box-tag { color: var(--accent); }
.term { color: var(--accent); font-weight: 600; }

/* 自测 */
.selftest details {
  border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 12px 16px; margin: 10px 0; background: var(--bg-card);
  transition: border-color .18s, box-shadow .18s;
}
.selftest details:hover { border-color: var(--border); box-shadow: var(--shadow-sm); }
.selftest details[open] { border-color: var(--border); }
.selftest summary { cursor: pointer; font-weight: 600; }
.selftest summary:hover { color: var(--accent); }
.selftest .answer {
  margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border);
  color: var(--fg-soft); font-size: 14.5px;
}

/* 翻页 */
.pager { display: flex; gap: 14px; margin-top: 52px; }
.pager a {
  flex: 1; padding: 13px 16px; border: 1px solid var(--border-soft); border-radius: var(--radius);
  color: var(--fg); background: var(--bg-card); box-shadow: var(--shadow-sm);
  transition: border-color .18s, transform .18s, box-shadow .18s;
}
.pager a:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pager .dir { display: block; font-size: 11px; letter-spacing: .1em; color: var(--fg-mute); text-transform: uppercase; }
.pager .pt { color: var(--link); font-weight: 600; }
.pager a.next { text-align: right; }

/* ---------- 首页 ---------- */
.hero { position: relative; margin: 0; padding: 52px 0 10px; }
.hero::before {
  content: ""; position: absolute; left: -18px; top: 34px; width: 4px; height: 92px;
  border-radius: 3px; background: linear-gradient(180deg, var(--accent), var(--accent-2));
  opacity: .85;
}
.hero .kicker {
  font-size: 11.5px; letter-spacing: .22em; color: var(--gold); font-weight: 700;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--serif); font-size: 52px; line-height: 1.2; margin: 14px 0 14px;
  letter-spacing: -.025em;
}
.hero .sub { color: var(--fg-soft); font-size: 17px; margin-bottom: 18px; line-height: 1.75; max-width: 40em; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin: 20px 0; }
.card {
  position: relative; display: block; padding: 16px 18px; overflow: hidden;
  border: 1px solid var(--border-soft); border-radius: 12px;
  color: var(--fg); background: var(--bg-card); box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card::after {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  opacity: 0; transition: opacity .2s ease;
}
.card:hover {
  border-color: var(--border); text-decoration: none;
  transform: translateY(-3px); box-shadow: var(--shadow-md);
}
.card:hover::after { opacity: 1; }
.card .no {
  display: block; font-size: 11.5px; letter-spacing: .1em; color: var(--fg-mute);
  margin-bottom: 5px; font-family: var(--serif);
}
.card .ct { display: block; font-size: 16.5px; font-weight: 700; margin: 0 0 6px; line-height: 1.4; }
.card .cd { display: block; font-size: 13.5px; color: var(--fg-soft); line-height: 1.65; }
.section-title {
  position: relative; font-family: var(--serif); font-size: 27px; font-weight: 700;
  margin: 60px 0 8px; padding-bottom: 0; letter-spacing: -.015em;
}
.section-title::after {
  content: ""; display: block; width: 56px; height: 3px; margin-top: 12px;
  border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.section-sub { color: var(--fg-soft); margin: 14px 0 6px; font-size: 15px; }
.mermaid-box {
  border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 16px;
  margin: 20px 0; overflow-x: auto; background: var(--bg-card); box-shadow: var(--shadow-sm);
}
/* 目录网格（总览页） */
.toc-list { margin: 16px 0; }
.toc-list .row {
  display: flex; gap: 14px; padding: 10px 4px; border-bottom: 1px solid var(--border-soft);
  align-items: baseline; transition: background .16s;
}
.toc-list .row:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }
.toc-list .row .n { flex: 0 0 46px; color: var(--fg-mute); font-variant-numeric: tabular-nums; font-family: var(--serif); }
.toc-list .row > span:last-child { flex: 1; min-width: 0; }
.toc-list .row .t { display: block; font-weight: 600; }
.toc-list .row .d { display: block; color: var(--fg-soft); font-size: 13.5px; }

/* ---------- 页脚与进度 ---------- */
footer.site-footer {
  border-top: 1px solid var(--border-soft); margin-top: 56px; padding: 28px 22px 34px;
  color: var(--fg-soft); font-size: 13px; line-height: 2; text-align: center;
}
footer.site-footer a { color: var(--fg-soft); }
footer.site-footer a:hover { color: var(--accent); }
.progress {
  position: fixed; top: 0; left: 0; height: 2px; z-index: 60; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--gold));
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 45%, transparent);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .layout.has-toc { grid-template-columns: 210px minmax(0, 1fr); max-width: 960px; gap: 32px; }
  .layout.has-toc > .toc { display: none; }
  .layout.has-toc > .toc.toc-inline { display: block; }
}
@media (max-width: 900px) {
  .layout, .layout.has-toc { grid-template-columns: 1fr; gap: 0; padding: 0 20px; max-width: 100%; }
  .sidebar {
    position: static; max-height: none; padding: 8px 0 4px;
    border-bottom: 1px solid var(--border-soft);
  }
  .sidebar.open { padding-bottom: 10px; }
  .toc.toc-inline { margin-top: 10px; padding-top: 10px; }
  .sidebar:not(.open) .nav-group,
  .sidebar:not(.open) .toc.toc-inline { display: none; }
  .sidebar.open .toggle-label .arrow { transform: rotate(180deg); }
  .sidebar .toggle-label {
    display: flex; align-items: center; gap: 7px; cursor: pointer;
    font-size: 13px; color: var(--fg-soft); padding: 6px 2px; user-select: none;
  }
  .sidebar .toggle-label .arrow { transition: transform .18s; font-size: 10px; }
  .topbar .topnav { display: none; }
  .search-wrap input { width: 148px; }
  .search-wrap input:focus { width: 178px; }
  main.doc h1 { font-size: 28px; }
  .hero h1 { font-size: 34px; }
  .hero::before { display: none; }
  .hero { padding-top: 30px; }
  main.doc h2 { font-size: 21px; }
  .section-title { font-size: 22px; }
  .pager { flex-direction: column; }
}
@media (min-width: 901px) {
  .sidebar .toggle-label { display: none; }
}
@media print {
  .topbar, .sidebar, .toc, .progress { display: none; }
  .layout, .layout.has-toc { display: block; max-width: none; }
  body::before { display: none; }
}