:root {
  --fg: #1f2328;
  --muted: #59636e;
  --bg: #ffffff;
  --subtle: #f6f8fa;
  --border: #d1d9e0;
  --link: #0969da;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6edf3;
    --muted: #9198a1;
    --bg: #0d1117;
    --subtle: #161b22;
    --border: #30363d;
    --link: #4493f8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.site-header,
#content {
  max-width: 48rem;
  margin: 0 auto;
}

.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.site-header a {
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}

a { color: var(--link); }

h1, h2, h3, h4 { line-height: 1.25; margin: 1.5em 0 0.5em; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }

img { max-width: 100%; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--subtle);
  border-radius: 6px;
}
code { padding: 0.15em 0.35em; }
pre { padding: 1rem; overflow-x: auto; }
pre code { padding: 0; background: none; }

blockquote {
  margin: 1em 0;
  padding: 0 1em;
  color: var(--muted);
  border-left: 0.25em solid var(--border);
}

table { border-collapse: collapse; display: block; overflow-x: auto; }
th, td { padding: 0.4em 0.8em; border: 1px solid var(--border); }
th { background: var(--subtle); }

li:has(> input[type="checkbox"]) { list-style: none; }
li > input[type="checkbox"] { margin: 0 0.4em 0 -1.4em; }

hr { border: 0; border-top: 1px solid var(--border); }

.footnotes { font-size: 0.875em; color: var(--muted); }