:root {
  --ink: #1b1f24;
  --muted: #5b6470;
  --accent: #2563eb;
  --bg: #ffffff;
  --soft: #f3f5f8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.hero {
  background: var(--soft);
  padding: 4rem 1.25rem 3rem;
  text-align: center;
}
.hero.small { padding: 2.5rem 1.25rem 2rem; }
.brand {
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
}
.brand a { color: inherit; text-decoration: none; }
.brand-icon { width: 28px; height: 28px; border-radius: 7px; vertical-align: -8px; margin-right: 4px; }
h1 { margin: 0 0 1rem; font-size: 2.4rem; line-height: 1.15; }
h2 { margin: 2.5rem 0 0.75rem; font-size: 1.35rem; }
.lead { max-width: 38rem; margin: 0 auto 0.75rem; color: var(--muted); }
.lead.strong { color: var(--ink); font-weight: 600; }
.sub { margin: 0.5rem 0 0; color: var(--muted); font-size: 0.95rem; }
.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.8rem 1.4rem;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}
main, footer { max-width: 40rem; margin: 0 auto; padding: 0 1.25rem 3rem; }
footer { color: var(--muted); font-size: 0.9rem; }
code {
  background: var(--soft);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.95em;
}
a { color: var(--accent); }
ul, ol { padding-left: 1.4rem; }
li { margin: 0.35rem 0; }