:root {
  --bg: #fbfaf7;
  --text: #1d1d1f;
  --muted: #5f6368;
  --accent: #1f4e79;
  --border: #dedad2;
  --note-bg: #f1eee6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --text: #e6e4df;
    --muted: #a3a7ad;
    --accent: #8ab4e0;
    --border: #33373c;
    --note-bg: #22252a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  max-width: 46rem;
  padding: 0 16px 3rem;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 Georgia, "Times New Roman", serif;
  overflow-wrap: break-word;
}
a { color: var(--accent); }
.site-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding: 1.25rem 0 0.75rem;
  border-bottom: 2px solid var(--text);
}
.site-title {
  font: 700 1.5rem/1.2 system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  text-decoration: none;
}
nav a {
  margin-left: 1rem;
  font: 600 0.95rem system-ui, -apple-system, "Segoe UI", sans-serif;
  text-decoration: none;
}
.disclaimer {
  margin: 1rem 0;
  padding: 0.6rem 0.8rem;
  background: var(--note-bg);
  border-left: 3px solid var(--muted);
  color: var(--muted);
  font: 0.85rem/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
.brief-date {
  color: var(--muted);
  font: 600 0.9rem system-ui, -apple-system, "Segoe UI", sans-serif;
}
.brief h1 { font-size: 1.6rem; line-height: 1.25; }
.brief h2, .brief h3 {
  margin-top: 2rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--border);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
.brief p { margin: 0.6rem 0; }
.archive { padding-left: 1.2rem; }
.archive li { margin: 0.35rem 0; }
footer {
  margin-top: 3rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font: 0.85rem system-ui, -apple-system, "Segoe UI", sans-serif;
}