:root {
  color-scheme: light dark;
  --background: #faf9f5;
  --surface: #fff;
  --text: #222;
  --muted: #616161;
  --border: #d4d4d0;
  --accent: #111;
  --header: #292929;
  --header-text: #f7f7f7;
  --note: #f0f0ed;
  --content-width: 790px;
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-family: var(--serif);
  background: var(--background);
  color: var(--text);
}

* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body { margin: 0; font-size: 18px; line-height: 1.78; background: var(--background); }
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
button, input { font: inherit; color: inherit; }
p { margin: 0 0 1.12em; }
h1, h2, h3 { line-height: 1.25; text-wrap: pretty; }
h1 { font-size: 2.5rem; font-weight: normal; letter-spacing: -.025em; margin: .2rem 0 .8rem; }
h2 { font-size: 1.65rem; font-weight: normal; margin: 2.6rem 0 1.1rem; }
h3 { font-size: 1.24rem; margin: 2rem 0 1rem; }
ol, ul { padding-left: 1.45rem; }
li { margin: .3rem 0; }

.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }
.skip-link { position: absolute; left: 1rem; top: -6rem; background: var(--surface); padding: .7rem 1rem; z-index: 1000; font-family: var(--sans); }
.skip-link:focus { top: 1rem; }
.site-header { background: var(--header); color: var(--header-text); border-bottom: 1px solid var(--border); }
.header-inner { max-width: 1530px; margin: 0 auto; padding: 1.2rem 2rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { color: inherit; text-decoration: none; display: flex; flex-direction: column; line-height: 1.3; }
.collection { font-family: var(--sans); font-size: .66rem; letter-spacing: .2em; margin-bottom: .25rem; }
.book-name { font-size: 1.62rem; }
.top-nav { font-family: var(--sans); display: flex; gap: 1.9rem; font-size: .85rem; }
.top-nav a { color: inherit; text-decoration: none; min-height: 44px; display: flex; align-items: center; }
.top-nav a:hover, .top-nav a[aria-current="page"] { text-decoration: underline; }
.site-header :focus-visible { outline-color: #f0f0f0; }
.menu-toggle { display: none; align-items: center; gap: .45rem; min-height: 44px; padding: .35rem .55rem; border: 1px solid #777; color: inherit; background: transparent; font-family: var(--sans); font-size: .78rem; }
.single-column { width: min(var(--content-width), calc(100% - 2.5rem)); margin: 0 auto; padding: 3rem 0 5rem; outline: none; }
.page-opening { border-bottom: 1px solid var(--border); padding-bottom: 1.2rem; margin-bottom: 1.8rem; }
.eyebrow { font: .66rem/1.65 var(--sans); letter-spacing: .11em; color: var(--muted); text-transform: uppercase; margin: 0 0 .85rem; }
.home-title { font-size: 2.9rem; }
.home-subtitle { font-size: 1.35rem; line-height: 1.55; color: var(--muted); max-width: 42rem; }
.home-intro { font-size: 1.08rem; }
.edition-ledger { display: flex; flex-wrap: wrap; gap: .35rem 1.3rem; font: .69rem/1.7 var(--sans); color: var(--muted); padding: .9rem 0; }
.edition-ledger strong { color: var(--text); font-weight: 650; }
.start-reading { margin: 1.4rem 0 1.7rem; padding: .95rem 0; border-block: 1px solid var(--border); }
.part-list { list-style: none; padding: 0; }
.part-list > li { border-top: 1px solid var(--border); padding: 1rem 0; margin: 0; }
.part-prefix { font: .65rem/1.5 var(--sans); letter-spacing: .11em; color: var(--muted); display: block; margin-bottom: .35rem; }
.part-name { font-size: 1.2rem; }
.part-list p { margin: .35rem 0 0; font-size: .9rem; color: var(--muted); }
.chapter-list { margin: .8rem 0 0; padding-left: 0; list-style: none; }
.chapter-list li { position: relative; padding: .45rem 7rem .45rem 2.3rem; margin: 0; border-bottom: 1px dotted var(--border); }
.chapter-list .chapter-number { position: absolute; left: 0; color: var(--muted); font-variant-numeric: tabular-nums; }
.status-label { float: right; margin-right: -7rem; font: .64rem/1.7 var(--sans); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.part-list.compact .chapter-list { display: none; }
.part-list.compact > li { display: grid; grid-template-columns: 1fr auto; column-gap: 1rem; }
.part-list.compact .part-prefix { grid-column: 1 / -1; }
.part-list.compact p { grid-column: 2; grid-row: 2; white-space: nowrap; }
.editorial-note { padding: 1rem 1.2rem; background: var(--note); border-left: 3px solid var(--accent); }
.draft-notice { margin: 0 0 1.5rem; padding: .8rem 1rem; background: var(--note); border: 1px solid var(--border); font: .76rem/1.6 var(--sans); }
.chapter-opening { padding-bottom: 1.4rem; margin-bottom: 1.7rem; border-bottom: 1px solid var(--border); }
.chapter-subtitle { color: var(--muted); font-size: 1.2rem; line-height: 1.55; }
.reading-meta, .breadcrumbs { font: .7rem/1.65 var(--sans); color: var(--muted); }
.breadcrumbs { display: flex; gap: .5rem; margin-bottom: 1.4rem; }
.chapter-toc { margin: 0 0 2.1rem; padding: 1rem 1.1rem; border-block: 1px solid var(--border); font: .78rem/1.55 var(--sans); }
.chapter-toc > p { margin: 0 0 .55rem; font-weight: 650; }
.chapter-toc ol { margin: 0; padding-left: 1.25rem; columns: 2; column-gap: 2.25rem; }
.chapter-toc li { break-inside: avoid; margin: .28rem 0; }
.chapter-toc .toc-subsection { margin-left: 1rem; color: var(--muted); }
.reading-content { overflow-wrap: break-word; }
.reading-content pre { overflow-x: auto; padding: 1rem; background: var(--note); border: 1px solid var(--border); }
.reading-content table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table-viewport { max-width: 100%; overflow-x: auto; overscroll-behavior-inline: contain; }
.table-mobile-hint { display: none; }
.reading-content th, .reading-content td { padding: .65rem .75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.reading-content th { font: 600 .78rem/1.5 var(--sans); background: var(--note); }
.reading-content figure { margin: 2rem 0; padding: 1rem 0; border-block: 1px solid var(--border); }
.reading-content figcaption { font: 600 .82rem/1.55 var(--sans); margin-bottom: .9rem; }
.figure-mobile-hint { display: block; margin: 0 0 .55rem; color: var(--muted); font: .7rem/1.5 var(--sans); }
.figure-viewport { max-width: 100%; overflow-x: auto; overscroll-behavior-inline: contain; padding-bottom: .45rem; }
.reading-content figure img { display: block; height: auto; margin: 0; }
.reading-content .figure-viewport img { width: 1200px; min-width: 1200px; max-width: none; }
.figure-note { color: var(--muted); font-size: .86rem; line-height: 1.65; margin: .8rem 0 0; }
.figure-pending { margin: 2rem 0; padding: 1rem 1.1rem; border: 1px dashed var(--border); background: var(--note); font: .78rem/1.6 var(--sans); color: var(--muted); }
.figure-pending strong { display: block; margin-bottom: .35rem; color: var(--text); }
.figure-pending p { margin: 0; }
.editorial-note h2 { margin-top: .25rem; }
.search-form { margin: 1.6rem 0; font-family: var(--sans); }
.search-form label { display: block; font-size: .76rem; color: var(--muted); margin-bottom: .6rem; }
.search-row { display: flex; gap: .6rem; }
.search-row input { flex: 1; min-height: 46px; padding: .6rem .8rem; background: var(--surface); border: 1px solid var(--border); }
.search-row button { min-height: 46px; padding: .6rem 1.2rem; background: var(--header); color: var(--header-text); border: 1px solid var(--header); }
.history-entry { border-left: 2px solid var(--border); padding: .1rem 0 .4rem 1.2rem; }
.history-entry h2 { margin: .25rem 0 .8rem; }
.site-footer { border-top: 1px solid var(--border); max-width: 1466px; margin: 0 auto; padding: 1.8rem 2rem 2.5rem; display: flex; justify-content: space-between; gap: 2rem; font: .72rem/1.7 var(--sans); color: var(--muted); }
.site-footer p { margin: .35rem 0; }
.footer-brand { font-family: var(--serif); font-size: 1rem; color: var(--text); }
.site-footer nav { display: flex; gap: .5rem 1.3rem; flex-wrap: wrap; align-content: start; }
.site-footer a { color: var(--muted); }

@media (max-width: 800px) {
  .header-inner { padding: 1rem 1.2rem; display: grid; grid-template-columns: 1fr auto; gap: .5rem 1rem; }
  .book-name { font-size: 1.45rem; }
  .collection { font-size: .6rem; }
  .menu-toggle { display: inline-flex; }
  .top-nav { display: none; grid-column: 1 / -1; flex-direction: column; gap: 0; padding-top: .65rem; }
  .top-nav.open { display: flex; }
  .top-nav a { min-height: 44px; border-top: 1px solid #4a4a4a; }
  .single-column { width: auto; padding: 2rem 1.25rem 3.5rem; }
  h1, .home-title { font-size: 2.12rem; }
  h2 { font-size: 1.46rem; margin-top: 2.2rem; }
  .home-subtitle { font-size: 1.18rem; }
  .part-list.compact > li { display: block; }
  .part-list.compact p { margin-top: .35rem; }
  .chapter-list li { padding-right: 0; padding-bottom: 1.7rem; }
  .chapter-toc ol { columns: 1; }
  .table-mobile-hint { display: block; margin: .5rem 0; color: var(--muted); font: .7rem/1.5 var(--sans); }
  .table-viewport table { width: max-content; min-width: 42rem; }
  .figure-mobile-hint { display: block; margin: 0 0 .55rem; color: var(--muted); font: .7rem/1.5 var(--sans); }
  .figure-viewport { overflow-x: auto; overscroll-behavior-inline: contain; padding-bottom: .45rem; }
  .reading-content .figure-viewport img { width: 1200px; min-width: 1200px; max-width: none; margin: 0; }
  .status-label { position: absolute; left: 2.3rem; bottom: .25rem; float: none; margin: 0; }
  .site-footer { padding: 1.5rem 1.25rem 2rem; display: block; }
  .site-footer nav { margin-top: 1rem; }
}

@media (prefers-color-scheme: dark) {
  :root { --background: #171717; --surface: #202020; --text: #e5e5e5; --muted: #aaa; --border: #444; --accent: #fff; --header: #292929; --header-text: #fff; --note: #242424; }
}

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

@media print {
  :root { color-scheme: light; --background: #fff; --surface: #fff; --text: #000; --muted: #333; --border: #bbb; --accent: #000; }
  body { font-size: 11pt; line-height: 1.55; }
  .site-header, .site-footer, .skip-link { display: none !important; }
  .single-column { width: 100%; padding: 0; }
  a { color: #000; text-decoration: none; }
}