:root {
  --bg: #ffffff;
  --surface: #f7f7f8;
  --border: #e4e4e7;
  --text: #18181b;
  --muted: #52525b;
  --accent: #1f5f8b;
  --accent-soft: #eaf2f8;
  --radius: 10px;
  --maxw: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131316;
    --surface: #1b1b1f;
    --border: #2e2e35;
    --text: #ececee;
    --muted: #a1a1aa;
    --accent: #7db6db;
    --accent-soft: #17262f;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: baseline;
  justify-content: space-between;
}

.brand {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  margin-left: 18px;
}

nav a:hover, nav a:focus { color: var(--accent); text-decoration: underline; }

main { padding: 44px 0 8px; }

h1 {
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

h2 {
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 38px 0 10px;
  padding-top: 4px;
}

h3 { font-size: 16px; margin: 24px 0 6px; }

p, li { color: var(--text); }

.lead {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 26px;
}

.meta {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 30px;
}

ul, ol { padding-left: 22px; }
li { margin: 6px 0; }

a { color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 22px 0;
}

.card h2, .card h3 { margin-top: 0; }

.steps {
  list-style: none;
  padding: 0;
  margin: 18px 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 0 42px;
  margin: 16px 0;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps strong { display: block; }

.notdo li::marker { color: var(--muted); }

.pill {
  display: inline-block;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  margin: 2px 4px 2px 0;
}

.doclinks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 8px;
}

.doclinks a {
  flex: 1 1 200px;
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  background: var(--surface);
}

.doclinks a:hover, .doclinks a:focus {
  border-color: var(--accent);
}

.doclinks strong { display: block; color: var(--text); }
.doclinks span { font-size: 14px; color: var(--muted); }

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 52px;
  padding: 26px 0 40px;
  font-size: 14px;
  color: var(--muted);
}

footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--accent); }

footer.site .row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

@media (max-width: 520px) {
  nav a { margin: 0 16px 0 0; }
  header.site .wrap { flex-direction: column; align-items: flex-start; }
  main { padding-top: 32px; }
}