:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --border: #e3e6ea;
  --text: #11161d;
  --muted: #5b6574;
  --brand: #1b4965;
  --accent: #e4572e;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1319;
    --surface: #161d26;
    --border: #273140;
    --text: #e9edf2;
    --muted: #9aa6b6;
    --brand: #7fb2d4;
    --accent: #ff7a52;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  margin-bottom: 48px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.brand svg { width: 34px; height: 34px; color: var(--brand); flex: none; }
.brand b { font-size: 17px; font-weight: 650; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 6vw, 42px); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 16px; }
h2 { font-size: 22px; letter-spacing: -.01em; margin: 44px 0 12px; }
h3 { font-size: 17px; margin: 28px 0 6px; }
p, li { color: var(--text); }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 32px; }
.tag {
  display: inline-block; font-size: 13px; font-weight: 600;
  color: var(--accent); border: 1px solid currentColor;
  border-radius: 999px; padding: 3px 12px; margin-bottom: 20px;
}
.steps { list-style: none; padding: 0; counter-reset: s; }
.steps li {
  counter-increment: s; position: relative;
  padding: 16px 0 16px 48px; border-top: 1px solid var(--border);
}
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 16px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--brand); font-weight: 650; font-size: 14px;
  display: grid; place-items: center;
}
.note {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; margin: 32px 0;
  font-size: 15px; color: var(--muted);
}
.note strong { color: var(--text); }
a { color: var(--brand); text-underline-offset: 3px; }
footer {
  margin-top: 64px; padding: 28px 0 48px;
  border-top: 1px solid var(--border);
  font-size: 14px; color: var(--muted);
}
footer p { margin: 6px 0; color: inherit; }
.toc { font-size: 15px; background: var(--surface); border: 1px solid var(--border);
       border-radius: var(--radius); padding: 16px 20px; margin: 28px 0; }
.toc ol { margin: 8px 0 0; padding-left: 20px; }
.toc li { margin: 4px 0; }
.updated { font-size: 14px; color: var(--muted); margin-top: -8px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.narrow { max-width: 540px; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  border-radius: 10px; padding: 11px 20px; font-size: 16px;
  border: 1px solid var(--border); color: var(--text); background: var(--surface);
}
.btn:hover { border-color: var(--brand); }
.btn-sm { padding: 7px 15px; font-size: 15px; }
.btn-primary {
  background: var(--brand); border-color: var(--brand); color: #fff;
  display: block; text-align: center; margin: 28px 0 10px;
}
@media (prefers-color-scheme: dark) { .btn-primary { color: #0e1319; } }
.btn-primary:hover { opacity: .9; }
.hint { font-size: 14px; color: var(--muted); margin: 0 0 8px; }
.metodos { list-style: none; padding: 0; display: grid; gap: 8px; }
.metodos li {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; background: var(--surface);
  color: var(--muted); font-size: 15px;
}