:root {
  --serif: 'Libre Baskerville', Georgia, serif;
  --sans: 'Open Sans', Helvetica, Arial, sans-serif;
  --ink: #222;
  --muted: #555;
  --rule: #ddd;
  --accent: #b3261e;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font: 16px/1.6 var(--sans);
}
header.site {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 20px;
  border-bottom: 1px solid var(--rule);
}
header.site .brand {
  font: 15px var(--sans);
  text-decoration: none;
  color: var(--ink);
  letter-spacing: 0.02em;
}
header.site nav a {
  font: italic 15px var(--serif);
  color: var(--ink);
  text-decoration: none;
  margin-left: 22px;
}
header.site nav a[aria-current] { font-weight: 700; }
header.site nav a:hover { text-decoration: underline; }
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}
h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.25;
  margin: 1.6em 0 0.5em;
}
h1 { font-size: 44px; text-align: center; margin-top: 0.6em; }
h2 { font-size: 28px; }
h3 { font-size: 22px; }
p { margin: 0 0 1em; }
a { color: var(--accent); }
blockquote.epigraph {
  font: italic 16px/1.5 var(--serif);
  color: var(--muted);
  margin: 0 auto 2em;
  max-width: 600px;
}
blockquote.epigraph cite { font-style: normal; color: var(--ink); }
figure { margin: 1.5em 0; }
figure img { display: block; width: 100%; height: auto; border: 1px solid var(--rule); }
figcaption { font-size: 14px; color: var(--muted); margin-top: 6px; }
ul { padding-left: 1.3em; }
li { margin-bottom: 0.6em; }
.button {
  display: inline-block;
  padding: 10px 22px;
  border: 2px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  font: 600 14px var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.button:hover { background: var(--ink); color: #fff; }
.note { font-size: 14px; color: var(--muted); }

/* Accordion: the summary is the header, the panel flows in the page when open */
details.accordion { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin: 1.5em 0; }
details.accordion + details.accordion { border-top: 0; margin-top: -1.5em; }
details.accordion summary {
  cursor: pointer;
  list-style: none;
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: 24px/1.4 var(--serif);
  transition: background 0.2s;
}
details.accordion summary::-webkit-details-marker { display: none; }
details.accordion summary:hover { background: #f5f5f5; }
details.accordion summary::after { content: '+'; font-size: 20px; }
details.accordion[open] summary::after { content: '−'; }
details.accordion .panel { padding: 8px 16px 16px; color: #333; }

footer.site {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 600px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  details.accordion summary { font-size: 20px; }
}