:root {
  --bg: #f7f8fa; --fg: #16181d; --muted: #5c6370; --line: #dcdfe5;
  --card: #fff; --accent: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11131a; --fg: #e8eaed; --muted: #9aa1ad; --line: #2a2f3a;
    --card: #171a22; --accent: #60a5fa;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 32px 16px 64px; background: var(--bg); color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 760px; margin: 0 auto; }
nav { font-size: 14px; color: var(--muted); margin-bottom: 28px; }
nav a { color: var(--accent); text-decoration: none; }
nav a:hover { text-decoration: underline; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 34px 0 10px; }
.date { color: var(--muted); font-size: 14px; margin: 0 0 8px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
code {
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 1px 5px; font-size: 14px;
}
a { color: var(--accent); }
table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
footer {
  margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}
.hero {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 24px; margin: 24px 0;
}
.download {
  display: inline-block; background: var(--accent); color: #fff; padding: 11px 20px;
  border-radius: 9px; text-decoration: none; font-weight: 600;
}
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; padding-left: 34px; position: relative; margin: 12px 0; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 1px;
  width: 23px; height: 23px; border-radius: 50%; background: var(--accent);
  color: #fff; font-size: 13px; display: grid; place-items: center;
}