:root {
  --ink: #1a2332;
  --muted: #5c6b7f;
  --line: #d8dee8;
  --bg: #f7f8fa;
  --card: #ffffff;
  --accent: #1f4e8c;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header, main, footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}
header {
  padding-top: 28px;
  padding-bottom: 8px;
}
header a.home {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}
nav {
  margin: 8px 0 0;
  font-size: 14px;
}
nav a {
  color: var(--accent);
  margin-right: 16px;
}
main {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px 28px 32px;
  margin: 16px auto 24px;
}
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 24px 0 8px; }
p, li { color: var(--ink); }
.lede, .meta, footer {
  color: var(--muted);
  font-size: 14px;
}
.meta { margin: 0 0 20px; }
footer { padding-bottom: 32px; }
ul { padding-left: 20px; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: #eef2f7;
  padding: 1px 4px;
  border-radius: 4px;
}