:root {
  --bg: #fff; --fg: #1f2328; --muted: #59636e; --line: #d1d9e0; --soft: #f6f8fa;
  --link: #2a5aa8; --accent: #f2cf4a; --on-accent: #1f2328; --blue: #3d6fc4;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --fg: #f0f3f6; --muted: #9198a1; --line: #3d444d; --soft: #151b23;
    --link: #7fa8ec; --blue: #7fa8ec; }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif; }
.wrap { max-width: 820px; margin: 0 auto; padding: 0 16px; }

.top { position: sticky; top: 0; z-index: 1; background: var(--bg); border-bottom: 1px solid var(--line); }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 16px;
  min-height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 20px;
  color: var(--fg); text-decoration: none; }
.brand:hover { background: none; color: var(--fg); }
.top nav { display: flex; flex-wrap: wrap; gap: 0 18px; font-size: 15px; }
.top nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--fg); text-decoration: none; }
.top nav a[aria-current] { box-shadow: inset 0 -3px 0 var(--accent); font-weight: 600; }
.top nav a:hover { background: none; box-shadow: inset 0 -3px 0 var(--line); }
.top nav .lang { color: var(--muted); }

main { padding-top: 32px; padding-bottom: 48px; }
h1 { font-size: 34px; line-height: 1.2; margin: 8px 0 16px; }
.hero { font-size: 44px; margin-top: 24px; }
.hero span { display: block; font-size: 22px; font-weight: 400; color: var(--muted); margin-top: 6px; }
.lead { font-size: 21px; line-height: 1.5; }
h2 { font-size: 26px; line-height: 1.25; margin: 48px 0 12px; }
h3 { font-size: 20px; margin: 32px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 4px; }

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); text-decoration-thickness: 3px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

code { font: 0.88em/1.5 ui-monospace, "DejaVu Sans Mono", monospace; background: var(--soft);
  padding: 1px 4px; border-radius: 4px; }
pre { background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px;
  overflow-x: auto; margin: 12px 0 18px; }
pre code { background: none; padding: 0; font-size: 14px; }

img { max-width: 100%; height: auto; }
main p > img { display: block; margin: 8px 0; border-radius: 10px; }

table { border-collapse: collapse; width: 100%; margin: 12px 0 18px; font-size: 15px; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
th { background: var(--soft); }

.contents { background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; margin: 0 0 24px; font-size: 15px; }
.contents summary { cursor: pointer; font-weight: 600; min-height: 32px; }
.contents ul { margin: 6px 0 4px; padding-left: 20px; }
.contents li { margin: 2px 0; }

.foot { border-top: 1px solid var(--line); padding-top: 8px; padding-bottom: 40px; font-size: 15px; }
.foot h2 { font-size: 18px; margin: 16px 0 8px; }
.links { padding-left: 20px; }
.muted { color: var(--muted); }

.notfound { padding-top: 56px; }
.notfound h1 { font-size: 28px; margin-top: 32px; }

@media (max-width: 560px) {
  h1 { font-size: 28px; }
  .hero { font-size: 36px; }
  .hero span { font-size: 19px; }
  .lead { font-size: 19px; }
  .top nav { gap: 0 14px; }
}