:root {
  --page-bg: #e9e4d4;
  --paper: #fffdf7;
  --border: #a39c84;
  --rule: #cbc3aa;
  --text: #17150f;
  --muted: #555041;
  --heading: #29461a;
  --link: #003399;
  --link-visited: #5a2b7a;
  --note-bg: #f4efdf;
  --code-bg: #f8f4e8;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page-bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", Times, serif;
  line-height: 1.5;
}

.site-logo {
  position: fixed;
  top: 12px;
  left: 12px;
  width: 72px;
  height: 72px;
  display: block;
  padding: 6px;
  border: 1px solid var(--border);
  background: #fff;
  z-index: 10;
}

.site-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

a {
  color: var(--link);
  text-decoration: underline;
}

a:visited {
  color: var(--link-visited);
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
}

p,
ul,
ol,
pre {
  margin: 0 0 1rem;
}

ul,
ol {
  padding-left: 1.45rem;
}

li {
  margin-bottom: 0.35rem;
}

code {
  padding: 0.08rem 0.28rem;
  border: 1px solid var(--rule);
  background: var(--code-bg);
  color: var(--text);
  font-family: "Liberation Mono", "DejaVu Sans Mono", monospace;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  background: var(--code-bg);
}

pre code {
  padding: 0;
  border: 0;
  background: transparent;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.75rem;
  color: var(--heading);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
  text-align: center;
}

h2 {
  font-size: 1.4rem;
}

h3 {
  font-size: 1.16rem;
}

h4 {
  font-size: 1rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 1.2rem 0;
}

.page-shell {
  width: min(100%, 1060px);
  margin: 0 auto;
  padding: 18px 18px 48px;
}

.doc-frame {
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 18px 28px 24px;
}

.book-header {
  text-align: center;
}

.book-subtitle {
  font-size: 1.18rem;
}

.book-meta,
.byline,
.copyright,
.lead,
.nav-links,
.page-footer,
.entry-meta,
.section-label {
  color: var(--muted);
}

.book-meta,
.byline,
.copyright {
  text-align: center;
}

.book-meta,
.byline {
  margin-bottom: 0.5rem;
}

.byline p,
.copyright p {
  margin-bottom: 0.3rem;
}

.nav-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.95rem;
}

.nav-links.is-bottom {
  margin-top: 1.5rem;
}

.nav-links span {
  color: #6a6555;
}

.toc-title,
.section-label {
  margin-bottom: 0.75rem;
}

.book-actions {
  text-align: center;
}

.book-actions p:last-child {
  margin-bottom: 0;
}

.toc,
.toc ul,
.toc ol {
  margin: 0;
  padding-left: 1.45rem;
}

.toc > li,
.toc ul > li,
.toc ol > li {
  margin-bottom: 0.45rem;
}

.toc-section {
  margin-top: 1rem;
}

.toc-section:first-of-type {
  margin-top: 0;
}

.toc-section > h3,
.toc-section > h4 {
  margin-bottom: 0.35rem;
}

.section-header {
  margin-bottom: 1rem;
}

.book-entry-header {
  margin-bottom: 1.2rem;
}

.lead {
  margin-bottom: 1.2rem;
}

.entry-meta {
  font-size: 0.95rem;
}

.pull-note {
  margin: 1rem 0 1.25rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--heading);
  background: var(--note-bg);
}

blockquote {
  margin: 1rem 0 1.25rem 1.2rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
}

.chapter-contents {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  background: var(--note-bg);
}

.chapter-contents h3 {
  margin-bottom: 0.5rem;
}

.chapter-contents ul {
  margin: 0;
  padding-left: 1.2rem;
}

.book-entries {
  display: block;
}

.book-entry {
  scroll-margin-top: 1rem;
}

.book-entry h2 {
  text-align: left;
}

.entry-divider {
  margin: 1.8rem 0;
}

.page-footer {
  font-size: 0.94rem;
}

.muted {
  color: var(--muted);
}

strong {
  color: #211d11;
}

@media (max-width: 720px) {
  .site-logo {
    position: static;
    margin: 12px auto 0;
  }

  .page-shell {
    padding: 12px 8px 30px;
  }

  .doc-frame {
    padding: 14px 16px 18px;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
  }
}