:root {
  --fg: #1d2327;
  --bg: #f6f7f7;
  --card: #ffffff;
  --muted: #646970;
  --line: #dcdcde;
  --accent: #2271b1;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e8ea;
    --bg: #15181b;
    --card: #1d2125;
    --muted: #a0a5aa;
    --line: #33383d;
    --accent: #6fb0e8;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
.pagina { max-width: 60rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
header { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; align-items: center; border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: 2rem; }
header .marca { font-weight: 700; letter-spacing: 0.02em; color: var(--fg); text-decoration: none; }
header nav { margin-left: auto; display: flex; gap: 1.25rem; font-size: 0.92rem; }
a { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 0.75rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.5rem; }
.entrada { font-size: 1.1rem; }
.nota { color: var(--muted); }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 0 0.3em; overflow-wrap: anywhere; }
li { margin-bottom: 0.4rem; }
footer { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1rem; font-size: 0.85rem; color: var(--muted); }