:root {
  --ink: #15241f;
  --muted: #61706a;
  --paper: #fffdf8;
  --canvas: #e9eee9;
  --green: #174f3d;
  --green-soft: #e4eee8;
  --gold: #b58638;
  --hold: #8d3e2f;
  --hold-soft: #f7e8e3;
  --line: #d6ddd8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(181, 134, 56, .12), transparent 28rem),
    var(--canvas);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

body > header,
body > nav,
body > main,
body > footer {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

body > header {
  margin-top: 34px;
  padding: 48px 54px;
  color: white;
  background: linear-gradient(135deg, #123b31, #1d5c47);
  border-radius: 24px 24px 0 0;
  box-shadow: 0 18px 50px rgba(21, 36, 31, .15);
}

header h1 {
  max-width: 820px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  font-weight: 500;
  letter-spacing: -.04em;
  line-height: 1.02;
}

header .subtitle {
  max-width: 720px;
  margin: 20px 0 0;
  color: #dfeae5;
  font-size: 1.08rem;
}

nav#TOC {
  padding: 28px 54px 34px;
  background: #f7f5ee;
  border-bottom: 1px solid var(--line);
}

nav#TOC::before {
  content: "Review contents";
  display: block;
  margin-bottom: 12px;
  color: var(--green);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

nav#TOC ul {
  columns: 2;
  gap: 36px;
  margin: 0;
  padding-left: 18px;
}

nav#TOC li { break-inside: avoid; margin: 4px 0; }
nav#TOC ul ul { display: none; }
nav#TOC a { color: var(--green); text-decoration: none; }
nav#TOC a:hover { text-decoration: underline; }

main {
  padding: 44px 54px 80px;
  background: var(--paper);
  box-shadow: 0 18px 50px rgba(21, 36, 31, .12);
}

h1, h2, h3 { scroll-margin-top: 24px; }

main h1 {
  margin: 84px -20px 30px;
  padding: 28px 28px 24px;
  color: white;
  background: var(--green);
  border-radius: 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 500;
  line-height: 1.1;
}

main h1:first-child { margin-top: 0; }

main h2 {
  margin-top: 52px;
  padding-bottom: 10px;
  color: var(--green);
  border-bottom: 2px solid var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.8rem;
  font-weight: 500;
}

main h3 {
  margin-top: 30px;
  color: #265f4c;
  font-size: 1.1rem;
}

p, li { max-width: 880px; }

blockquote {
  margin: 26px 0;
  padding: 18px 22px;
  color: #5b382c;
  background: var(--hold-soft);
  border-left: 5px solid var(--hold);
  border-radius: 0 10px 10px 0;
}

table {
  width: 100%;
  margin: 24px 0 34px;
  border-collapse: collapse;
  font-size: .92rem;
}

th, td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th { color: white; background: var(--green); }
tr:nth-child(even) td { background: #f3f6f3; }

code {
  padding: .15em .35em;
  color: #553c23;
  background: #f3eee3;
  border-radius: 4px;
  font-size: .9em;
}

strong { color: #103d30; }
a { color: #176449; }

hr {
  margin: 70px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

footer {
  margin-bottom: 34px;
  padding: 24px 54px;
  color: var(--muted);
  background: #f7f5ee;
  border-radius: 0 0 24px 24px;
}

@media (max-width: 760px) {
  body > header, body > nav, body > main, body > footer {
    width: 100%;
    border-radius: 0;
  }
  body > header, nav#TOC, main, footer { padding-left: 22px; padding-right: 22px; }
  nav#TOC ul { columns: 1; }
  main h1 { margin-inline: 0; }
  table { display: block; overflow-x: auto; }
}

@media print {
  body { background: white; font-size: 11pt; }
  body > header, body > nav, body > main, body > footer { width: 100%; box-shadow: none; }
  nav#TOC { break-after: page; }
  main h1 { break-before: page; }
  a { color: inherit; }
}