:root {
  --text: #231f1c;
  --muted: #6e645b;
  --bg: #fffdf9;
  --accent: #a3261c;
  --line: #ebe1d6;
  --box: #faf3eb;
  --serif: Georgia, "Times New Roman", serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.125rem/1.7 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.site, main { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }
header.site {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem 1.5rem;
  padding-top: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--line);
}
.brand { font: 700 1.6rem/1 var(--serif); color: var(--accent); text-decoration: none; }
nav { display: flex; gap: 1.25rem; font-size: .95rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current] { color: var(--accent); }
h1, h2, h3 { font-family: var(--serif); line-height: 1.25; }
h1 { font-size: clamp(1.9rem, 6vw, 2.6rem); margin: 2.5rem 0 1.5rem; }
h2 { font-size: 1.65rem; margin: 3rem 0 1rem; scroll-margin-top: 1rem; }
h3 { font-size: 1.25rem; margin: 2rem 0 .5rem; }
p, ul { margin: 0 0 1.1rem; }
li + li { margin-top: .5rem; }
li > p { margin: 0; }
a { color: var(--accent); }
img { display: block; max-width: 100%; height: auto; border-radius: 6px; margin-bottom: 2rem; }
.toc { background: var(--box); border: 1px solid var(--line); border-radius: 6px; padding: .9rem 1.25rem; margin: 2rem 0; }
.toc summary { font-weight: 600; cursor: pointer; }
.toc ol { margin: .75rem 0 0; padding-left: 1.4rem; font-size: 1rem; }
.toc li + li { margin-top: .15rem; }
footer.site {
  margin-top: 4rem; padding-top: 1.5rem; padding-bottom: 2.5rem;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem;
}
@media (max-width: 40rem) { /* phones: thumb-sized tap areas */
  header.site { padding-top: .5rem; padding-bottom: .5rem; }
  nav a { padding: .7rem 0; }
  .toc summary { padding: .5rem 0; }
  .toc a { display: block; padding: .55rem 0; }
  .toc li + li { margin-top: 0; }
}