:root {
  color-scheme: light dark;
  --bg: #f6f4ef;
  --fg: #161513;
  --muted: #5c5852;
  --line: #d9d4c8;
  --accent: #1f4f8a;
  --code-bg: #ece8df;
  --max: 72rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161513;
    --fg: #f3efe6;
    --muted: #b7b1a6;
    --line: #3a372f;
    --accent: #8cb4e8;
    --code-bg: #24211b;
  }
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Sans", "Noto Sans JP", ui-sans-serif, system-ui, sans-serif;
  line-height: 1.65;
}
a { color: var(--accent); }
header {
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 1.25rem;
}
header a {
  color: inherit;
  font-weight: 700;
  text-decoration: none;
}
.wrap {
  display: grid;
  grid-template-columns: 16rem minmax(0, 1fr);
  max-width: var(--max);
  margin: 0 auto;
}
nav {
  border-right: 1px solid var(--line);
  padding: 1.25rem;
}
nav a { color: inherit; text-decoration: none; }
nav a[aria-current="page"] { font-weight: 700; }
nav ul { list-style: none; margin: 0; padding: 0; }
nav li { margin: 0.35rem 0; }
nav .group { margin-top: 1.1rem; }
nav .group > p {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
main { padding: 1.5rem 1.5rem 4rem; }
article { max-width: 46rem; }
h1, h2, h3, h4 { line-height: 1.3; }
h1 { font-size: 2rem; margin: 0 0 1rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.7rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
p { margin: 0.85rem 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--code-bg); padding: 0.1em 0.35em; font-size: 0.9em; }
pre {
  background: var(--code-bg);
  padding: 0.9rem 1rem;
  overflow: auto;
}
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 0.4rem 0.6rem; text-align: left; }
blockquote {
  margin: 1rem 0;
  padding: 0.1rem 1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}
img { max-width: 100%; }
.lead { color: var(--muted); margin-top: -0.4rem; }
@media (max-width: 800px) {
  .wrap { grid-template-columns: 1fr; }
  nav { border-right: 0; border-bottom: 1px solid var(--line); }
}