:root {
  --bg: #fdfdfc;
  --fg: #1d1d1f;
  --muted: #5f6368;
  --accent: #1f4e79;
  --rule: #e2e2e0;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151618; --fg: #e8e8e6; --muted: #9aa0a6; --accent: #8ab4e8; --rule: #2c2e33; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0 auto;
  max-width: 46rem;
  padding: 3rem 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; overflow-wrap: anywhere; }
a:hover { text-decoration: underline; }

header { margin-bottom: 2.5rem; }
h1 { font-size: 2.1rem; font-weight: 650; letter-spacing: -0.02em; margin: 0; line-height: 1.15; }
h1 .cred { font-size: 1.2rem; font-weight: 400; color: var(--muted); }
.headline { margin: 0.35rem 0 0.6rem; color: var(--muted); }
.contacts { margin: 0; font-size: 0.92rem; }
.downloads { margin: 1rem 0 0; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.btn { border: 1px solid var(--rule); border-radius: 6px; padding: 0.3rem 0.75rem; font-size: 0.9rem; }
.btn:hover { border-color: var(--accent); text-decoration: none; }
nav { margin-top: 1.25rem; display: flex; flex-wrap: wrap; gap: 0.3rem 1rem; font-size: 0.85rem; }
nav a { color: var(--muted); }

h2 {
  font-size: 1.05rem; font-weight: 650; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--accent); border-bottom: 1px solid var(--rule); padding-bottom: 0.3rem; margin: 2.5rem 0 1rem;
}
section { scroll-margin-top: 1rem; }
p { margin: 0 0 0.8rem; }

.entry { margin-bottom: 1.4rem; }
.line { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.when { color: var(--muted); font-size: 0.9rem; white-space: nowrap; font-variant-numeric: tabular-nums; }
.entry p { margin: 0.5rem 0; }
ul, ol { padding-left: 1.25rem; margin: 0.4rem 0 0; }
li { margin-bottom: 0.4rem; }
.refs li { font-size: 0.95rem; }
.prior { color: var(--muted); font-size: 0.9rem; }
.note { color: var(--muted); font-style: italic; margin-top: 0.8rem; }

footer { margin-top: 3rem; color: var(--muted); font-size: 0.8rem; }