body {
  max-width: 42em;
  margin: 0 auto;
  padding: 1.5em;
  font-family: system-ui, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafafa;
}
nav {
  display: flex;
  gap: 1.2em;
  align-items: baseline;
  border-bottom: 1px solid #ddd;
  padding-bottom: 0.6em;
  margin-bottom: 1.5em;
}
nav .brand { font-weight: 700; font-size: 1.15em; }
nav a { color: #333; text-decoration: none; }
nav a:hover { text-decoration: underline; }
h1 { font-size: 1.7em; line-height: 1.25; }
.lede { font-size: 1.1em; }
.cmd {
  background: #1a1a2e;
  color: #e0e0e0;
  padding: 1em;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.9em;
}
footer {
  margin-top: 3em;
  border-top: 1px solid #ddd;
  padding-top: 1em;
  font-size: 0.8em;
  color: #666;
}
a { color: #0645ad; }