:root {
  color-scheme: light;
  --accent-blue: #007acc;
  --light-highlight: #d4d4d4;
  --primary-text: #333333;
  --dark-highlight: #252525;
  --dark-background: #1e1e1e;
  --paper: #ffffff;
  --font-body: Georgia, "Times New Roman", serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  max-width: 50rem;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  color: var(--primary-text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

header { border-bottom: 2px solid var(--dark-background); padding-bottom: 1.5rem; }

h1, h2, h3, nav, .document-label, .entry-meta, dt, footer {
  font-family: var(--font-heading);
}

h1, h2, h3 { color: var(--dark-highlight); line-height: 1.35; }
h1 { margin: 0.25rem 0; font-size: 2.25rem; font-weight: 650; }
h2 { margin: 0 0 1rem; font-size: 1.25rem; }
h3 { margin: 0 0 0.25rem; font-size: 1rem; font-weight: 650; }
p { margin: 0 0 0.8rem; }
.document-label { margin: 0; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
.sample-marker { font-size: 0.75rem; font-weight: 400; vertical-align: middle; }
.subtitle { margin-bottom: 1.25rem; }
nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; font-size: 0.9rem; }
a { color: var(--accent-blue); text-underline-offset: 0.18em; }
a:hover { color: var(--dark-highlight); }
a:focus-visible { outline: 2px solid var(--dark-highlight); outline-offset: 4px; }
section { padding: 1.75rem 0; border-bottom: 1px solid var(--light-highlight); }
section > :last-child, article > :last-child { margin-bottom: 0; }
article + article { margin-top: 1.5rem; }
.entry-meta { margin-bottom: 0.65rem; font-size: 0.85rem; }
ul { margin: 0.5rem 0 0; padding-left: 1.35rem; }
li + li { margin-top: 0.35rem; }
dl { margin: 0; }
dt { font-size: 0.9rem; font-weight: 650; }
dd { margin: 0 0 0.75rem; }
dd:last-child { margin-bottom: 0; }
address { font-style: normal; }
footer { padding-top: 1.25rem; font-size: 0.8rem; }
.skip-link { position: absolute; top: -5rem; padding: 0.5rem; background: var(--paper); }
.skip-link:focus { top: 0.5rem; }

@media (max-width: 36rem) {
  body { padding: 1.5rem 1rem; }
  h1 { font-size: 1.8rem; }
  .sample-marker { display: block; }
  section { padding: 1.5rem 0; }
}

@media print {
  body { max-width: none; padding: 0; font-size: 10pt; }
  nav, .skip-link { display: none; }
  a { color: var(--primary-text); }
  h2, h3 { break-after: avoid; }
  article { break-inside: avoid; }
}