:root {
  --bg: #fafaf9; --fg: #1c1917; --muted: #57534e; --accent: #7c3aed;
  --card: #ffffff; --border: #e7e5e4;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0c0a09; --fg: #f5f5f4; --muted: #a8a29e; --accent: #a78bfa;
          --card: #1c1917; --border: #292524; }
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }
header { padding-top: 2rem; padding-bottom: 1rem; display: flex; align-items: baseline;
         justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; }
header .brand { font-weight: 700; text-decoration: none; color: var(--fg); font-size: 1.1rem; }
header nav a { color: var(--muted); text-decoration: none; margin-left: 1rem; }
header nav a:hover, a:hover { color: var(--accent); }
a { color: var(--accent); }
main { padding-bottom: 3rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 1.5rem 0 .75rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .5rem; }
p, li { color: var(--fg); }
.lede { font-size: 1.15rem; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: .75rem;
        padding: 1.25rem 1.5rem; margin: 1.5rem 0; }
ol.steps { padding-left: 1.25rem; }
ol.steps li { margin: .5rem 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em;
       background: var(--card); border: 1px solid var(--border); padding: .1em .35em; border-radius: .3em; }
.meta { color: var(--muted); font-size: .9rem; }
footer { border-top: 1px solid var(--border); padding-top: 1rem; padding-bottom: 2rem;
         color: var(--muted); font-size: .85rem; }
footer a { color: var(--muted); }