:root {
  --bg: #ffffff; --fg: #1f2328; --muted: #59636e; --line: #d1d9e0;
  --code-bg: #f6f8fa; --link: #0969da; --nav-bg: #f6f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117; --fg: #e6edf3; --muted: #9198a1; --line: #3d444d;
    --code-bg: #151b23; --link: #4493f8; --nav-bg: #010409;
  }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1rem; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  display: grid; grid-template-columns: 15rem minmax(0, 1fr);
}
header { display: none; }
nav {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--nav-bg); border-right: 1px solid var(--line); padding: 1.5rem 1rem;
}
nav a { display: block; padding: .3rem .6rem; border-radius: 6px; color: var(--fg); text-decoration: none; }
nav a:hover { background: var(--line); }
nav a[aria-current] { font-weight: 600; background: var(--line); }
nav .home { font-weight: 700; margin-bottom: .8rem; }
main { max-width: 56rem; padding: 2rem 2.5rem 4rem; }
a { color: var(--link); }
h1, h2 { border-bottom: 1px solid var(--line); padding-bottom: .3em; }
h1, h2, h3, h4 { line-height: 1.25; margin: 1.5em 0 .6em; }
code, pre { font: 85%/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--code-bg); padding: .15em .35em; border-radius: 6px; }
pre { background: var(--code-bg); padding: 1rem; border-radius: 6px; overflow-x: auto; }
pre code { background: none; padding: 0; font-size: inherit; }
pre.mermaid { background: none; text-align: center; }
table { border-collapse: collapse; display: block; overflow-x: auto; margin: 1rem 0; }
th, td { border: 1px solid var(--line); padding: .4rem .8rem; vertical-align: top; }
th { background: var(--code-bg); }
blockquote { margin: 1rem 0; padding: 0 1rem; color: var(--muted); border-left: .25em solid var(--line); }
img { max-width: 100%; }
hr { border: 0; border-top: 1px solid var(--line); }
.contains-task-list { list-style: none; padding-left: 1.2rem; }
@media (max-width: 50rem) {
  body { display: block; }
  header {
    display: flex; gap: .8rem; align-items: center; padding: .6rem 1rem;
    border-bottom: 1px solid var(--line); background: var(--nav-bg);
  }
  header label { cursor: pointer; font-size: 1.3rem; }
  header a { color: var(--fg); font-weight: 700; text-decoration: none; }
  nav { display: none; position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  #nav-toggle:checked ~ nav { display: block; }
  nav .home { display: none; }
  main { padding: 1rem 1rem 3rem; }
}