:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1f2430;
  --muted: #5d6573;
  --line: #e4e1d8;
  --accent: #0f7a5c;
  --accent-text: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --surface: #1b1f26;
    --text: #e8eaee;
    --muted: #a0a8b5;
    --line: #2a3039;
    --accent: #3fc79a;
    --accent-text: #0b1512;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header.sitio, main, footer.sitio { max-width: 760px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
header.sitio {
  display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; justify-content: space-between;
  padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line);
}
header.sitio .marca { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; white-space: nowrap; }
header.sitio .marca img { display: block; }
header.sitio nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
header.sitio nav a { color: var(--muted); text-decoration: none; }
header.sitio nav a:hover { color: var(--text); text-decoration: underline; }
main { padding-top: 32px; padding-bottom: 48px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { margin: 0 0 12px; }
ul, ol { padding-left: 22px; margin: 0 0 12px; }
.muted { color: var(--muted); font-size: 14px; }
.hero { padding: 24px 0 8px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 620px; }
.boton {
  display: inline-block; background: var(--accent); color: var(--accent-text);
  padding: 10px 18px; border-radius: 8px; text-decoration: none; font-weight: 600;
}
.tarjetas { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 16px 0; }
.tarjeta { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.tarjeta h3 { margin: 0 0 6px; font-size: 16px; }
.tarjeta p { margin: 0; color: var(--muted); font-size: 15px; }
.aviso { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 12px 16px; margin: 16px 0; }
footer.sitio { padding-top: 20px; padding-bottom: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer.sitio a { color: var(--muted); }