:root {
  --bg: #f7f7f8;
  --panel: #fff;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #171a21;
    --ink: #e7e9ee;
    --muted: #9aa3b2;
    --line: #262b36;
    --accent: #60a5fa;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
header {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
header a.home {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
}
main {
  max-width: 44rem;
  margin: 20px auto 0;
  padding: 4px 20px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
h1 { font-size: 20px; line-height: 1.3; margin: 1rem 0 0.25rem; font-weight: 600; }
h2 { font-size: 15px; margin: 1.5rem 0 0.1rem; font-weight: 600; }
p, li { margin: 0.4rem 0; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 12.5px; }
footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 16px 20px 32px;
  color: var(--muted);
  font-size: 12.5px;
}
footer a { margin-right: 1rem; }
@media (max-width: 46rem) {
  main { margin: 0; border-width: 1px 0; border-radius: 0; }
}