:root {
  --accent: #3b5bdb;
  --ink: #1a1a2e;
  --muted: #5c5f73;
  --bg: #ffffff;
  --line: #e7e8ef;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
header.site, footer.site {
  max-width: 680px;
  margin: 0 auto;
}
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand .dot { color: var(--accent); }
nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  font-size: 14px;
}
nav a:hover { color: var(--accent); }
.wrap { max-width: 680px; margin: 0 auto; padding: 56px 24px 88px; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 10px; }
.lede { font-size: 19px; color: var(--muted); margin: 0 0 32px; }
h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 36px 0 10px;
}
h3 { font-size: 17px; margin: 24px 0 6px; }
p { margin: 10px 0; }
ul { padding-left: 20px; margin: 10px 0; }
li { margin: 5px 0; }
a { color: var(--accent); }
code {
  background: #f3f4fa;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.9em;
}
ol.steps { counter-reset: step; list-style: none; padding-left: 0; }
ol.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 36px;
  margin: 12px 0;
}
ol.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 24px;
  height: 24px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}
footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  padding: 24px;
}
footer.site a { color: var(--muted); }