:root { --fg: #1f2328; --muted: #59636e; --bg: #ffffff; --card: #f6f8fa; --line: #d1d9e0; --link: #0969da; }
@media (prefers-color-scheme: dark) {
  :root { --fg: #e6edf3; --muted: #9198a1; --bg: #0d1117; --card: #151b23; --line: #3d444d; --link: #4493f8; }
}
* { 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: 860px; margin: 0 auto; padding: 32px 16px 48px; }
h1 { font-size: 2.2rem; margin: 0 0 4px; }
h2 { font-size: 1.4rem; margin: 0 0 8px; }
h3 { font-size: 1.1rem; margin: 24px 0 8px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0 0 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 20px; margin: 16px 0; }
.tag { font-size: .75rem; border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; color: var(--muted); vertical-align: middle; }
code, pre { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9rem; }
pre { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 12px; overflow-x: auto; }
table { border-collapse: collapse; width: 100%; margin: 8px 0; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
img { max-width: 100%; height: auto; border-radius: 6px; }
nav { margin-bottom: 16px; font-size: .95rem; }
footer { margin-top: 32px; color: var(--muted); font-size: .9rem; }