:root { color-scheme: light dark; --bg:#f8f7f3; --paper:#fff; --ink:#243440; --muted:#626e77; --line:#dce2e4; --accent:#126778; --code:#edf2f4; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-padding-top:6rem; }
body { margin:0; background:var(--bg); color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; line-height:1.85; }
a { color:var(--accent); text-underline-offset:4px; }
a:focus-visible, summary:focus-visible { outline:3px solid #d89026; outline-offset:5px; }
.skip { position:fixed; top:-100px; padding:12px; z-index:10; background:var(--paper); }
.skip:focus { top:0; }
.topbar { position:sticky; top:0; z-index:2; min-height:72px; padding:14px 4vw; display:flex; align-items:center; justify-content:space-between; gap:16px; background:var(--paper); border-bottom:1px solid var(--line); }
.brand { color:var(--ink); text-decoration:none; line-height:1.5; }
.topbar nav { display:flex; gap:22px; font-size:14px; flex-shrink:0; }
.layout { display:grid; grid-template-columns:270px minmax(0,900px); max-width:1330px; margin:auto; gap:50px; padding:0 28px; }
aside { position:sticky; top:94px; height:calc(100dvh - 110px); overflow:auto; padding:20px 16px 30px 0; font-size:13px; }
summary { cursor:pointer; font-weight:700; font-size:15px; margin-bottom:18px; }
aside ul { list-style:none; padding-left:0; }
aside li { margin:8px 0; }
aside li ul { margin:5px 0 12px; padding-left:14px; border-left:1px solid var(--line); }
aside a { text-decoration:none; color:var(--muted); display:block; }
aside a:hover { color:var(--accent); }
main { min-width:0; padding-bottom:60px; }
.hero { display:flex; gap:25px; align-items:center; padding:64px 0 48px; border-bottom:1px solid var(--line); }
.hero>div { flex:1; }
.hero img { width:180px; height:auto; border-radius:5px; box-shadow:10px 15px 30px #142c4233; transform:rotate(3deg); }
.eyebrow { font-size:12px; letter-spacing:2px; color:var(--accent); font-weight:700; }
.hero h1 { font-size:clamp(28px,3.2vw,42px); line-height:1.3; margin:20px 0; letter-spacing:-1px; }
.hero h1 span { color:var(--accent); }
.lead { font-size:17px; max-width:30em; }
.meta,.edition { font-size:12px; color:var(--muted); }
.button { display:inline-flex; gap:30px; padding:10px 22px; background:#126778; color:white; border-radius:5px; text-decoration:none; margin:15px 0 5px; }
article { max-width:760px; font-size:17px; }
article h1 { margin:72px 0 28px; padding-top:20px; border-top:1px solid var(--line); font-size:29px; line-height:1.5; }
article h1:first-child { border-top:0; margin-top:35px; }
article h2 { font-size:21px; margin:35px 0 15px; }
article p { margin:18px 0; }
article li { margin-bottom:10px; }
pre { padding:20px; background:var(--code); border-radius:6px; white-space:pre-wrap; overflow-wrap:anywhere; line-height:1.7; font-size:14px; }
code { font-family:ui-monospace,SFMono-Regular,Consolas,monospace; }
blockquote { margin:24px 0; border-left:3px solid var(--accent); background:var(--code); padding:1px 22px; }
table { width:100%; border-collapse:collapse; font-size:14px; margin:25px 0; }
th,td { border:1px solid var(--line); padding:11px; text-align:left; overflow-wrap:anywhere; }
th { background:var(--code); }
footer { border-top:1px solid var(--line); margin-top:60px; padding-top:25px; color:var(--muted); font-size:13px; }
@media (max-width:1000px) { .layout { gap:24px; grid-template-columns:220px minmax(0,1fr); } .hero img { width:125px; } }
@media (max-width:720px) { html { scroll-padding-top:100px; } .topbar { padding:12px 18px; align-items:flex-start; } .brand { font-size:12px; } .brand strong { display:block; } .topbar nav { gap:14px; font-size:12px; padding-top:8px; } .layout { display:block; padding:0 22px; } aside { position:relative; top:auto; height:auto; padding:20px 0 0; } aside nav { max-height:250px; overflow:auto; border:1px solid var(--line); padding:12px; border-radius:5px; } .hero { padding:32px 0; } .hero img { display:none; } article { font-size:16px; } article h1 { font-size:25px; margin-top:48px; } article h2 { font-size:20px; } th,td { padding:8px; font-size:13px; } }
@media (prefers-color-scheme:dark) { :root { --bg:#15202a; --paper:#1c2a35; --ink:#e2e9ed; --muted:#a6b5bf; --line:#354550; --accent:#7ed9d0; --code:#20313e; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }
@media print { .topbar,aside,.button { display:none; } .layout { display:block; } .hero img { display:none; } body { color:#111; background:#fff; } article { max-width:none; } article h1 { break-before:page; } }

/* BEGIN AIAS SHARED READER */
/* Aias Reader 1.0 — vendored into each book; no remote assets required. */
@media screen {
  :root {
    --reader-page: #f7f7f3 !important;
    --reader-surface: #fffefa !important;
    --reader-text: #292e34 !important;
    --reader-muted: #626b74 !important;
    --reader-line: #dedfd9 !important;
    --reader-accent: #28685c !important;
    --reader-soft: #eaf0eb !important;
    --reader-code: #eff0ec !important;
    --reader-keyword: #73579d !important;
    --reader-string: #28685c !important;
    --reader-number: #955028 !important;
    color-scheme: light !important;
  }
  :root[data-theme="dark"], body.dark, body[data-md-color-scheme="slate"] {
    --reader-page: #1c1f24 !important;
    --reader-surface: #22262c !important;
    --reader-text: #d7dce2 !important;
    --reader-muted: #a0a8b3 !important;
    --reader-line: #3b414a !important;
    --reader-accent: #91c5b5 !important;
    --reader-soft: #2b3835 !important;
    --reader-code: #282d34 !important;
    --reader-keyword: #c6afe8 !important;
    --reader-string: #a4c6a0 !important;
    --reader-number: #dfb385 !important;
    color-scheme: dark !important;
  }
  /* Adapt the existing readers without changing their content or navigation. */
  :root, body {
    --bg: var(--reader-page) !important;
    --page-bg: var(--reader-page) !important;
    --paper: var(--reader-surface) !important;
    --surface: var(--reader-surface) !important;
    --panel: var(--reader-surface) !important;
    --surface-muted: var(--reader-code) !important;
    --ink: var(--reader-text) !important;
    --fg: var(--reader-text) !important;
    --text: var(--reader-text) !important;
    --heading: var(--reader-text) !important;
    --muted: var(--reader-muted) !important;
    --line: var(--reader-line) !important;
    --accent: var(--reader-accent) !important;
    --accent-hover: var(--reader-accent) !important;
    --accent-soft: var(--reader-soft) !important;
    --code: var(--reader-code) !important;
    --code-bg: var(--reader-code) !important;
    --focus: var(--reader-accent) !important;
    --header-bg: var(--reader-page) !important;
    --md-default-bg-color: var(--reader-page) !important;
    --md-default-fg-color: var(--reader-text) !important;
    --md-default-fg-color--light: var(--reader-muted) !important;
    --md-default-fg-color--lighter: var(--reader-line) !important;
    --md-primary-fg-color: var(--reader-surface) !important;
    --md-primary-bg-color: var(--reader-text) !important;
    --md-accent-fg-color: var(--reader-accent) !important;
    --md-typeset-color: var(--reader-text) !important;
    --md-typeset-a-color: var(--reader-accent) !important;
    --md-code-bg-color: var(--reader-code) !important;
    --md-code-fg-color: var(--reader-text) !important;
    --md-code-hl-comment-color: var(--reader-muted) !important;
    --md-code-hl-keyword-color: var(--reader-keyword) !important;
    --md-code-hl-string-color: var(--reader-string) !important;
    --md-code-hl-number-color: var(--reader-number) !important;
  }
  html { -webkit-text-size-adjust: 100%; scrollbar-color: var(--reader-line) var(--reader-page); }
  body {
    background: var(--reader-page) !important;
    color: var(--reader-text) !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif !important;
    -webkit-font-smoothing: antialiased;
  }
  ::selection { background: var(--reader-accent); color: var(--reader-page); }
  :focus-visible { outline: 2px solid var(--reader-accent); outline-offset: 4px; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) {
    font-family: inherit;
    font-size: var(--reader-size, var(--body-size, var(--reading-size, var(--size, 18px)))) !important;
    line-height: 1.95;
    overflow-wrap: break-word;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) :is(h1, h2, h3, h4) {
    color: var(--reader-text) !important;
    font-family: inherit;
    line-height: 1.5;
    font-weight: 650;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) p { text-align: start; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) a {
    color: var(--reader-accent) !important;
    text-decoration-color: var(--reader-accent);
    text-underline-offset: .2em;
    overflow-wrap: anywhere;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre {
    background: var(--reader-code) !important;
    color: var(--reader-text) !important;
    border: 1px solid var(--reader-line) !important;
    border-radius: 8px;
    max-width: 100%;
    overflow-x: auto;
    white-space: pre;
    overflow-wrap: normal;
    line-height: 1.75;
    tab-size: 4;
    scrollbar-width: thin;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-variant-ligatures: none;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) :not(pre) > code {
    background: var(--reader-code) !important;
    color: var(--reader-text) !important;
    border-radius: 4px;
    padding: .12em .3em;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code {
    background: transparent !important;
    color: inherit !important;
    padding: 0;
    white-space: pre;
    overflow-wrap: normal;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code span { color: inherit !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code :is(.kw, .cf, .dt, .bu, .fu, .k, .kn, .kd, .kc, .kt) { color: var(--reader-keyword) !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code :is(.st, .ch, .vs, .s, .s1, .s2) { color: var(--reader-string) !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code :is(.dv, .bn, .fl, .mi, .mf) { color: var(--reader-number) !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) pre code :is(.co, .cv, .an, .do, .c, .c1, .cm, .cp) { color: var(--reader-muted) !important; font-style: normal; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) blockquote {
    background: var(--reader-soft) !important;
    color: var(--reader-text) !important;
    border-left: 3px solid var(--reader-accent) !important;
  }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) :is(th, td) { border-color: var(--reader-line) !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) th { background: var(--reader-code) !important; color: var(--reader-text) !important; }
  :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) :is(img, svg) { max-width: 100%; height: auto; }
  :is(.sidebar, #sidebar, .book-sidebar, .md-sidebar, .mobile-header, .mobile-menu nav) {
    background: var(--reader-surface) !important;
    color: var(--reader-text) !important;
    border-color: var(--reader-line) !important;
  }
  :is(aside, .sidebar, .md-sidebar) a { color: var(--reader-muted); }
  :is(aside, .sidebar, .md-sidebar) a:hover,
  :is(aside, .sidebar, .md-sidebar) a[aria-current] { color: var(--reader-accent) !important; background: var(--reader-soft) !important; }
  :is(.brand-title, .brand-subtitle, .nav-number, .sidebar-brand .eyebrow, .edition) { color: var(--reader-muted) !important; }
  :is(.primary-action, .button-primary, .primary-button, .start, .hero .button) {
    background: var(--reader-accent) !important;
    color: var(--reader-page) !important;
    border-color: var(--reader-accent) !important;
  }
  .contents-list a:hover { background: var(--reader-soft) !important; }
  .aias-basic-reader > #title-block-header { display: none; }
  .aias-basic-reader #TOC:not(:has(a)) { display: none; }
  .aias-basic-reader h1 { font-size: 1.7em; margin-top: 1.4em; }
  .aias-basic-reader blockquote { margin-inline: 0; padding: .5em 1.1em; }
  .aias-reader-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 12px; padding: 12px 0; margin: 0 0 16px; font-size: 13px; }
  .aias-reader-tools a { color: var(--reader-muted); }
  .aias-reader-theme {
    color: var(--reader-text) !important;
    background: var(--reader-surface) !important;
    border: 1px solid var(--reader-line) !important;
    border-radius: 6px;
    padding: 7px 11px;
    font: inherit;
    font-size: 12px;
    line-height: 1.5;
    min-height: 34px;
    cursor: pointer;
  }
  @media (max-width: 680px) {
    :is(main, article, .prose, .book-content, #book, .md-typeset, .aias-basic-reader) {
      font-size: var(--reader-size, var(--body-size, var(--reading-size, var(--size, 17px)))) !important;
    }
  }
}
/* END AIAS SHARED READER */