:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #57534e;
  --card: #ffffff;
  --border: #e7e5e4;
  --accent: #6d28d9;
  --accent-fg: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --card: #1c1917;
    --border: #292524;
    --accent: #c4b5fd;
    --accent-fg: #1c1917;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 46rem; margin: 0 auto; padding: 0 16px; }
header { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; padding-top: 1.5rem; }
header .brand { font-weight: 700; font-size: 1.15rem; text-decoration: none; color: var(--fg); margin-right: auto; }
nav a { margin-left: 1rem; }
main { padding-top: 1.5rem; padding-bottom: 3rem; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.3rem; margin-top: 2.2rem; }
h3 { font-size: 1.05rem; margin-top: 1.5rem; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 1rem 1.25rem; margin: 1rem 0; }
code { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 0.05rem 0.35rem; font-size: 0.92em; overflow-wrap: anywhere; }
ol li, ul li { margin: 0.35rem 0; }
footer { border-top: 1px solid var(--border); padding-top: 1rem; padding-bottom: 2rem; font-size: 0.9rem; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }