:root {
  --bg: #fbfaf7;
  --fg: #1f2328;
  --muted: #5b636d;
  --rule: #e2ded6;
  --accent: #1d6b5f;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --fg: #e6e6e3;
    --muted: #a0a7ae;
    --rule: #2c3238;
    --accent: #6cc4b4;
    --card: #1b1f23;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  flex-wrap: wrap; padding-top: 1.25rem; padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 650; font-size: 1.15rem;
  color: var(--fg); text-decoration: none; }
.brand img { width: 28px; height: 28px; }
nav { display: flex; gap: 1.1rem; font-size: .95rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }
main { padding-top: 2rem; padding-bottom: 3rem; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 .5rem; }
h2 { font-size: 1.25rem; margin: 2.2rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .25rem; }
.lede { font-size: 1.1rem; color: var(--muted); margin-top: 0; }
.updated { color: var(--muted); font-size: .9rem; }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 10px;
  padding: 1rem 1.25rem; margin: 1.25rem 0; }
ol.steps { padding-left: 1.3rem; }
ol.steps li { margin: .4rem 0; }
footer { border-top: 1px solid var(--rule); padding-top: 1.25rem; padding-bottom: 2rem;
  color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); }
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }