:root {
  --bg: #ffffff;
  --fg: #1a2233;
  --muted: #475066;
  --brand: #0b4f9c;
  --brand-fg: #ffffff;
  --card: #f3f6fb;
  --border: #c9d3e3;
  --warn-bg: #fff4d6;
  --warn-fg: #4d3600;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151f;
    --fg: #e8edf6;
    --muted: #b4bfd3;
    --brand: #8ec0ff;
    --brand-fg: #0a1220;
    --card: #1a2232;
    --border: #3a4660;
    --warn-bg: #3a2f10;
    --warn-fg: #ffe9a8;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 1.0625rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
.container { max-width: 62rem; margin: 0 auto; padding: 0 1.25rem; }
a { color: var(--brand); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; border-radius: 2px; }
.skip-link {
  position: absolute; left: 0.5rem; top: -4rem;
  background: var(--brand); color: var(--brand-fg);
  padding: 0.6rem 1rem; z-index: 10; border-radius: 4px;
}
.skip-link:focus { top: 0.5rem; }
header[role="banner"], .site-header { border-bottom: 1px solid var(--border); }
.site-header .container { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1.5rem; padding-top: 1rem; padding-bottom: 1rem; }
.brand { font-weight: 700; font-size: 1.15rem; }
nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; margin: 0; padding: 0; }
nav a { display: inline-block; padding: 0.5rem 0.25rem; min-height: 44px; line-height: 28px; }
.hero { padding: 3rem 0 2rem; }
h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); line-height: 1.2; margin: 0 0 1rem; }
h2 { font-size: 1.6rem; margin: 0 0 1rem; line-height: 1.3; }
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }
section { padding: 2.25rem 0; border-top: 1px solid var(--border); scroll-margin-top: 1rem; }
.badge {
  display: inline-block; background: var(--warn-bg); color: var(--warn-fg);
  border: 1px solid var(--border); padding: 0.35rem 0.8rem; border-radius: 999px; font-weight: 600;
}
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1rem 1rem 1rem; }
.steps li::before { content: "Paso " counter(s); display: block; font-weight: 700; color: var(--brand); margin-bottom: 0.25rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1.1rem; }
.muted { color: var(--muted); }
footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2.5rem; color: var(--muted); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}