:root { --bg: #ffffff; --fg: #1f2933; --muted: #52606d; --accent: #2e7d32; --line: #e4e7eb; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181c; --fg: #e4e7eb; --muted: #9aa5b1; --accent: #81c784; --line: #2a3138; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
header img { width: 40px; height: 40px; }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 20px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--accent); }
code { font-size: 0.9em; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }