:root{
  --ink:#172f3d;
  --muted:#526975;
  --paper:#fff;
  --accent:#c55432;
  --teal:#2f746c;
  --line:#cbdadd;
  --toolbar-height:4.4rem;
}

*{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;color:var(--ink);background:#eef3f3;font:17px/1.62 Georgia,serif}
a{color:#175f7b;overflow-wrap:anywhere}
img,svg{max-width:100%;height:auto}

.skip-link{
  position:fixed;
  top:.5rem;
  left:.5rem;
  z-index:100;
  padding:.65rem .9rem;
  color:#fff;
  background:var(--ink);
  border-radius:.25rem;
  font:700 .9rem/1.2 system-ui,sans-serif;
  transform:translateY(-200%);
}
.skip-link:focus{transform:translateY(0)}

.reader-toolbar{
  position:sticky;
  top:0;
  z-index:20;
  color:var(--ink);
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 9px rgba(23,47,61,.08);
  font:700 .88rem/1.2 system-ui,sans-serif;
}
.reader-toolbar__inner{
  width:min(100%,1100px);
  min-height:var(--toolbar-height);
  margin:auto;
  padding:.6rem 1rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}
.book-home,.chapter-button{
  display:inline-flex;
  align-items:center;
  min-height:2.6rem;
  padding:.55rem .75rem;
  border:1px solid var(--line);
  border-radius:.3rem;
  color:var(--ink);
  background:#fff;
  text-decoration:none;
}
.book-home:hover,.book-home:focus-visible,.chapter-button:hover,.chapter-button:focus-visible,.chapter-menu summary:hover,.chapter-menu summary:focus-visible{
  border-color:var(--teal);
  outline:2px solid transparent;
  background:#eef7f5;
}
.chapter-button[hidden]{display:none}
.reader-controls{display:flex;align-items:center;gap:.45rem;min-width:0}
.chapter-menu{position:relative}
.chapter-menu summary{
  min-height:2.6rem;
  padding:.62rem .8rem;
  border:1px solid var(--line);
  border-radius:.3rem;
  background:#fff;
  cursor:pointer;
  list-style:none;
}
.chapter-menu summary::-webkit-details-marker{display:none}
.chapter-menu summary::after{content:" ▾";color:var(--teal)}
.chapter-menu[open] summary::after{content:" ▴"}
.chapter-menu__panel{
  position:absolute;
  top:calc(100% + .45rem);
  right:0;
  width:min(34rem,calc(100vw - 2rem));
  max-height:min(70vh,38rem);
  overflow:auto;
  padding:.6rem .8rem;
  border:1px solid var(--line);
  border-radius:.35rem;
  background:#fff;
  box-shadow:0 12px 35px rgba(23,47,61,.2);
}
.compact-toc{margin:0;padding-left:1.65rem;font-weight:400}
.compact-toc li{margin:.3rem 0}
.compact-toc a{
  display:block;
  padding:.2rem .35rem;
  color:var(--ink);
  text-decoration:none;
}
.compact-toc a:hover,.compact-toc a:focus-visible{background:#eef7f5;text-decoration:underline}
.compact-toc a[aria-current="location"]{color:#0f5d55;background:#e2f1ee;font-weight:700}
.chapter-position{
  min-width:0;
  overflow:hidden;
  color:var(--muted);
  font-weight:600;
  white-space:nowrap;
  text-overflow:ellipsis;
}

.shell{
  width:min(100%,940px);
  min-width:0;
  margin:auto;
  overflow-wrap:anywhere;
  background:var(--paper);
  padding:5rem 6rem;
}
.cover{min-height:92vh;display:flex;flex-direction:column;justify-content:center;border-bottom:8px solid var(--accent)}
.eyebrow{font:700 .8rem/1.2 system-ui,sans-serif;text-transform:uppercase;letter-spacing:.16em;color:var(--teal)}
h1,h2,h3,h4{font-family:system-ui,sans-serif;line-height:1.16}
h1{font-size:2.35rem;margin-top:2.5rem}
h2{font-size:1.8rem;margin-top:2.5rem}
h3{font-size:1.4rem;margin-top:2.2rem}
h4{font-size:1.12rem;margin-top:1.8rem}
[id]{scroll-margin-top:calc(var(--toolbar-height) + 1rem)}
.cover h1{font-size:4.6rem;max-width:12ch;margin:.3em 0}
.subtitle{font:1.45rem/1.4 system-ui,sans-serif;color:var(--muted);max-width:29em}
.byline{margin-top:4rem;font:700 1rem system-ui,sans-serif}
.edition{color:var(--accent);font:700 1rem system-ui,sans-serif}
.notice{border:2px solid var(--accent);padding:1rem 1.25rem;background:#fff8f4}
.toc{columns:2;column-gap:3rem}
.toc li{break-inside:avoid;margin:.45em 0}
.toc a{color:var(--ink)}
.chapter{break-before:page;border-top:1px solid var(--line);padding-top:1rem}
.chapter>h2{color:#153f55}

.table-scroll{
  max-width:100%;
  margin:1.5rem 0;
  overflow-x:auto;
  overscroll-behavior-inline:contain;
  -webkit-overflow-scrolling:touch;
}
.table-scroll:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
table{width:100%;min-width:34rem;border-collapse:collapse;font-size:.9rem}
th,td{border:1px solid var(--line);padding:.55rem;text-align:left;vertical-align:top}
th{background:#eaf2f3;font-family:system-ui,sans-serif}
blockquote{border-left:4px solid var(--accent);margin-left:0;padding-left:1rem;color:var(--muted)}
code{font-size:.88em}
pre{
  max-width:100%;
  overflow:auto;
  padding:1rem;
  border:1px solid var(--line);
  border-radius:.25rem;
  background:#f5f8f8;
  font-size:.82rem;
  line-height:1.5;
  tab-size:2;
  -webkit-overflow-scrolling:touch;
}
pre code{white-space:pre}
:not(pre)>code{overflow-wrap:anywhere}
figure{max-width:100%;margin:2rem 0;break-inside:avoid}
figure img,p>img{display:block;width:auto;max-width:100%;height:auto;margin-inline:auto;border:1px solid var(--line)}
figcaption{font:italic .86rem/1.4 Georgia,serif;color:var(--muted)}
.chapter-notes{font-size:.84rem;color:var(--muted)}
.download-note{font-family:system-ui,sans-serif;background:#eaf2f3;padding:1rem}
.chapter-pagination{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:.75rem;
  margin-top:3rem;
  padding-top:1.25rem;
  border-top:1px solid var(--line);
  font:700 .9rem/1.3 system-ui,sans-serif;
}
.chapter-pagination a{padding:.55rem 0}
.chapter-pagination .next{text-align:right}
.chapter-pagination__position{color:var(--muted);font-weight:500;text-align:center}

@page{size:Letter;margin:.65in}
@media print{
  body{background:#fff}
  .skip-link,.reader-toolbar,.chapter-pagination{display:none!important}
  .shell{max-width:none;padding:0}
  .cover{min-height:9.2in}
  .toc{columns:2}
  a{color:inherit;text-decoration:none}
  .chapter{break-before:page}
  .table-scroll{overflow:visible}
  table{min-width:0}
}

@media(max-width:700px){
  :root{--toolbar-height:7.2rem}
  body{font-size:16px}
  .reader-toolbar__inner{align-items:stretch;flex-wrap:wrap;gap:.45rem}
  .book-home{flex:1}
  .chapter-position{order:2;width:100%;font-size:.78rem;text-align:center}
  .reader-controls{margin-left:auto}
  .chapter-menu__panel{position:fixed;top:calc(var(--toolbar-height) - .2rem);right:1rem;left:1rem;width:auto;max-height:calc(100vh - var(--toolbar-height) - 1rem)}
  .shell{padding:2rem 1.25rem}
  .cover{min-height:calc(100vh - var(--toolbar-height) - 3rem)}
  .cover h1{font-size:clamp(2.6rem,14vw,3.6rem)}
  .subtitle{font-size:1.18rem}
  .toc{columns:1}
  table{min-width:30rem}
  .chapter-pagination{grid-template-columns:1fr 1fr}
  .chapter-pagination__position{grid-column:1/-1;grid-row:1}
}