:root {
  --ink: #17242d;
  --muted: #586a73;
  --paper: #fbfcfa;
  --white: #ffffff;
  --line: #ccd5d2;
  --deep-green: #24594e;
  --brick: #9a462f;
  --gold: #b88424;
  --pale-green: #e8f1ed;
  --pale-blue: #e9f1f5;
  --pale-gold: #f6f0df;
  --pale-red: #f5eae6;
  --reading-width: 47rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.72;
}

a {
  color: var(--deep-green);
  text-underline-offset: 0.18em;
}

.site-header {
  align-items: baseline;
  background: var(--ink);
  color: var(--white);
  display: flex;
  gap: 1.25rem;
  min-height: 4.5rem;
  padding: 1rem clamp(1.25rem, 4vw, 3.75rem);
}

.site-header p {
  color: #cdd9d5;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.82rem;
  margin: 0;
}

.book-name {
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
}

.reader-layout {
  display: grid;
  grid-template-columns: minmax(15rem, 20rem) minmax(0, 1fr);
}

.reader-sidebar {
  background: #f0f3f1;
  border-right: 1px solid var(--line);
}

.sidebar-inner {
  max-height: calc(100vh - 4.5rem);
  overflow-y: auto;
  padding: 3rem 2rem;
  position: sticky;
  top: 0;
}

.sidebar-kicker,
.sidebar-chapter,
.nav-heading,
.download-link,
.chapter-number,
.chapter-meta,
.semantic-label,
.chapter-footer,
.chapter-list {
  font-family: Arial, Helvetica, sans-serif;
}

.sidebar-kicker {
  color: var(--brick);
  font-size: 0.72rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
  text-transform: uppercase;
}

.sidebar-chapter {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 2rem;
}

.nav-heading {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  margin: 0 0 0.8rem;
  padding-bottom: 0.55rem;
  text-transform: uppercase;
}

.reader-sidebar ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.reader-sidebar li {
  line-height: 1.35;
  margin: 0;
}

.reader-sidebar li + li {
  margin-top: 0.72rem;
}

.reader-sidebar nav a {
  color: #43545c;
  display: block;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.83rem;
  text-decoration: none;
}

.reader-sidebar nav a:hover,
.reader-sidebar nav a:focus-visible {
  color: var(--brick);
  text-decoration: underline;
}

.chapter-list {
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.8rem;
  padding-bottom: 1.3rem;
}

.chapter-list li + li {
  margin-top: 0.45rem;
}

.chapter-list a {
  align-items: baseline;
  display: grid !important;
  gap: 0.65rem;
  grid-template-columns: 1.1rem 1fr;
}

.chapter-list a span {
  color: var(--brick);
  font-size: 0.7rem;
  font-weight: 700;
}

.chapter-list a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.download-link {
  border-top: 1px solid var(--line);
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: 2rem;
  padding-top: 1rem;
}

main {
  min-width: 0;
}

.chapter-header {
  background: var(--pale-green);
  border-bottom: 1px solid #c2d2cc;
  padding: clamp(3rem, 7vw, 6rem) max(2rem, calc((100% - var(--reading-width)) / 2));
}

.chapter-number {
  color: var(--brick);
  font-size: 0.78rem;
  font-weight: 700;
  margin: 0 0 0.8rem;
  text-transform: uppercase;
}

.chapter-header h1 {
  font-size: clamp(2.5rem, 5vw, 4.35rem);
  line-height: 1.04;
  margin: 0;
  max-width: 13ch;
}

.chapter-deck {
  color: #344d52;
  font-size: 1.2rem;
  line-height: 1.5;
  margin: 1.5rem 0 0;
  max-width: 38rem;
}

.chapter-meta {
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.76rem;
  gap: 0.6rem 1.2rem;
  margin-top: 2rem;
}

.chapter-meta span + span::before {
  color: var(--gold);
  content: "|";
  margin-right: 1.2rem;
}

.chapter-body {
  margin: 0 auto;
  max-width: var(--reading-width);
  padding: 3.5rem 0 5rem;
}

.chapter-body h2,
.chapter-body h3 {
  scroll-margin-top: 1.5rem;
}

.chapter-body h2 {
  border-top: 1px solid var(--line);
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 4.25rem 0 1.25rem;
  padding-top: 1.5rem;
}

.chapter-body h2:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.chapter-body h3 {
  color: #304a50;
  font-size: 1.28rem;
  line-height: 1.3;
  margin: 2.5rem 0 0.8rem;
}

.chapter-body p {
  margin: 0 0 1.2rem;
}

.chapter-body strong {
  color: #102f37;
}

.chapter-body blockquote {
  border-left: 3px solid var(--gold);
  color: #3c4e55;
  margin: 2rem 0;
  padding: 0.2rem 0 0.2rem 1.5rem;
}

.semantic-block {
  border-left: 5px solid var(--deep-green);
  margin: 2.2rem 0;
  padding: 1.2rem 1.4rem 0.3rem;
}

.semantic-block p:last-child {
  margin-bottom: 0.8rem;
}

.semantic-keypoint {
  background: var(--pale-green);
}

.semantic-quickconcept {
  background: var(--pale-blue);
  border-color: #39708b;
}

.semantic-warning {
  background: var(--pale-red);
  border-color: var(--brick);
}

.semantic-sideline {
  background: var(--pale-gold);
  border-color: var(--gold);
}

.semantic-label {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.semantic-label + p {
  margin-top: 0;
}

.semantic-label + p strong {
  font-size: 1.05rem;
}

.table-scroll {
  margin: 2rem 0 2.4rem;
  overflow-x: auto;
}

.chapter-figure {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  margin: 2.8rem 0 3.2rem;
  padding: 1.5rem 0 1.15rem;
}

.chapter-figure > p:first-child {
  margin: 0;
}

.chapter-figure img {
  display: block;
  height: auto;
  margin: 0 auto;
  max-height: 34rem;
  max-width: 100%;
  width: auto;
}

.chapter-figure > p:last-child {
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.82rem;
  line-height: 1.55;
  margin: 1rem 0 0;
}

.katex-display {
  margin: 1.7rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.15rem 0;
}

table {
  border-collapse: collapse;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.84rem;
  line-height: 1.45;
  min-width: 38rem;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 0.8rem 0.9rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
}

tbody tr:nth-child(even) {
  background: #f1f4f2;
}

.chapter-body li + li {
  margin-top: 0.42rem;
}

.chapter-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  margin: 0 auto;
  max-width: var(--reading-width);
  padding: 1.5rem 0 3rem;
}

.chapter-footer p {
  margin: 0;
}

.chapter-jump {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
}

.chapter-jump a {
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
}

.chapter-jump a:hover,
.chapter-jump a:focus-visible {
  color: var(--brick);
  text-decoration: underline;
}

.chapter-jump a span {
  color: var(--muted);
  display: block;
  font-size: 0.68rem;
  font-weight: 400;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
}

.chapter-jump .next-chapter {
  text-align: right;
}

.chapter-footer-meta {
  display: flex;
  justify-content: space-between;
}

@media (max-width: 960px) {
  .reader-layout {
    display: block;
  }

  .reader-sidebar {
    border-bottom: 1px solid var(--line);
    border-right: 0;
  }

  .sidebar-inner {
    max-height: none;
    padding: 1.25rem max(1.25rem, calc((100% - var(--reading-width)) / 2));
    position: static;
  }

  .sidebar-kicker,
  .reader-sidebar nav {
    display: none;
  }

  .sidebar-chapter,
  .download-link {
    display: inline-block;
    margin: 0;
  }

  .download-link {
    border: 0;
    float: right;
    padding: 0;
  }

  .chapter-body,
  .chapter-footer {
    margin-left: 1.5rem;
    margin-right: 1.5rem;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 17px;
  }

  .site-header {
    align-items: flex-start;
    display: block;
  }

  .site-header p {
    margin-top: 0.15rem;
  }

  .chapter-header {
    padding: 3rem 1.5rem;
  }

  .chapter-header h1 {
    font-size: 2.7rem;
  }

  .chapter-meta span + span::before {
    content: none;
    margin: 0;
  }

  .chapter-body h2 {
    font-size: 1.65rem;
  }

  .chapter-footer {
    align-items: flex-start;
    display: block;
  }

  .chapter-footer-meta {
    display: block;
  }

  .chapter-footer-meta p + p {
    margin-top: 0.3rem;
  }

  .chapter-jump {
    display: block;
  }

  .chapter-jump a {
    display: block;
  }

  .chapter-jump .next-chapter {
    margin-top: 1.25rem;
    text-align: left;
  }

  #fig\:ch15-transaction-governance > p:first-child {
    overflow-x: auto;
  }

  #fig\:ch15-transaction-governance img {
    max-width: none;
    width: 42rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}