/* Minimal, readable, no JS, no fonts. */
:root {
  --fg: #1a1a1a;
  --fg-muted: #5a5a5a;
  --bg: #fafafa;
  --accent: #1f6feb;
  --rule: #e6e6e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --fg-muted: #a0a0a0;
    --bg: #141416;
    --accent: #66a3ff;
    --rule: #2a2a2e;
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}

header, main, footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}
header { padding-top: 48px; padding-bottom: 24px; border-bottom: 1px solid var(--rule); }
header h1 { margin: 0 0 4px; font-size: 28px; }
header h1 a { color: inherit; text-decoration: none; }
.tagline { margin: 0; color: var(--fg-muted); }

main { padding-top: 32px; padding-bottom: 64px; }
main section { margin-bottom: 48px; }
h2 { font-size: 22px; margin-top: 0; }
h3 { font-size: 17px; margin-top: 28px; margin-bottom: 8px; }

a { color: var(--accent); }
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: 4px; }
.prose code {
  background: rgba(127,127,127,0.12);
  padding: 1px 6px; border-radius: 4px;
  font-size: 14px;
}

footer {
  border-top: 1px solid var(--rule);
  padding-top: 20px; padding-bottom: 32px;
  color: var(--fg-muted);
  font-size: 14px;
}