:root {
  --bg: #f6f7fb; --surface: #fff; --text: #1f2433; --muted: #5f6b7f; --line: #e4e7ee;
  --accent: #4f46e5; --accent-strong: #3730a3; --accent-soft: #eef2ff; --note: #312e81;
  --code-bg: #f1f3f8; --pre-bg: #1f2433; --pre-text: #f3f4f6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d111b; --surface: #151a27; --text: #e6e8ef; --muted: #9aa3b5; --line: #262d3f;
    --accent: #8b93ff; --accent-strong: #b4b9ff; --accent-soft: rgb(79 70 229 / .18); --note: #e0e7ff;
    --code-bg: #232a3b; --pre-bg: #0a0d15; --pre-text: #e6e8ef;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-strong); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 72rem; margin: 0 auto; padding: 20px 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 20px; letter-spacing: -.5px; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: #4f46e5; color: #fff; }
.brand-sub { color: var(--muted); font-weight: 500; }
.version { color: var(--muted); font-size: 13px; }
main { max-width: 72rem; margin: 0 auto; padding: 0 16px 48px; }
.site-footer { max-width: 72rem; margin: 0 auto; padding: 24px 16px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

.hero { margin: 16px 0 32px; padding: 32px 24px; border-radius: 18px; background: linear-gradient(135deg, var(--accent-soft), var(--surface) 70%); border: 1px solid var(--line); }
.hero h1 { margin: 0; font-size: clamp(28px, 5vw, 40px); letter-spacing: -1px; line-height: 1.15; }
.hero p { margin: 8px 0 0; color: var(--muted); }
.search { margin-top: 20px; }
.search input { width: 100%; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; transition: border-color .15s, box-shadow .15s; }
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

.sections { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr)); }
.section { padding: 20px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); transition: border-color .15s, box-shadow .15s; }
.section:hover { border-color: var(--accent-soft); box-shadow: 0 6px 20px -12px rgb(79 70 229 / .35); }
.section h2 { margin: 0 0 8px; font-size: 15px; }
.section ul { list-style: none; margin: 0; padding: 0; }
.section a, .result { display: block; margin: 0 -8px; padding: 8px; border-radius: 8px; text-decoration: none; transition: background .15s; }
.section a:hover { background: var(--accent-soft); }
.link-title { display: block; color: var(--text); font-weight: 600; }
.link-summary { display: block; color: var(--muted); font-size: 14px; }
.badge { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 600; vertical-align: 2px; }

.results { display: grid; gap: 10px; }
.results .count { margin: 0 0 4px; color: var(--muted); font-size: 14px; }
.result { margin: 0; padding: 14px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; transition: border-color .15s, transform .15s; }
.result:hover { border-color: var(--accent); transform: translateY(-1px); }
.result-section { display: block; color: var(--accent); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }

.article-layout { display: grid; gap: 40px; margin-top: 16px; }
@media (min-width: 64rem) { .article-layout { grid-template-columns: minmax(0, 1fr) 15rem; } aside { position: sticky; top: 24px; align-self: start; } }
.crumbs { color: var(--muted); font-size: 14px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
article h1 { margin: 10px 0 0; font-size: clamp(26px, 4vw, 34px); letter-spacing: -.8px; line-height: 1.2; }
.lead { margin: 8px 0 0; color: var(--muted); font-size: 18px; }
.audience { display: inline-block; margin: 16px 0 0; padding: 4px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 600; }
aside h2 { margin: 0 0 10px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .6px; }
aside nav + nav { margin-top: 28px; }
aside ul { list-style: none; margin: 0; padding: 0; }
.toc { border-left: 1px solid var(--line); }
.toc a { display: block; margin-left: -1px; padding: 4px 12px; border-left: 1px solid transparent; color: var(--muted); font-size: 14px; text-decoration: none; }
.toc a:hover { border-color: var(--accent); color: var(--accent); }
.siblings a { display: block; padding: 6px 8px; border-radius: 6px; color: var(--muted); font-size: 14px; text-decoration: none; }
.siblings a:hover { background: var(--accent-soft); color: var(--text); }
.siblings a[aria-current] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.prose { max-width: 46rem; margin-top: 28px; }
.prose h2 { margin: 2.2em 0 .5em; font-size: 22px; letter-spacing: -.3px; scroll-margin-top: 24px; }
.prose h3 { margin: 1.6em 0 .4em; font-size: 18px; scroll-margin-top: 24px; }
.prose p, .prose ul, .prose ol, .prose pre, .prose table { margin: 0 0 1em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin-bottom: .35em; }
.prose code { padding: .1em .35em; border-radius: 4px; background: var(--code-bg); font: 0.875em ui-monospace, SFMono-Regular, Menlo, monospace; }
.prose pre { padding: 14px 16px; border-radius: 10px; background: var(--pre-bg); color: var(--pre-text); overflow-x: auto; font-size: 14px; line-height: 1.6; }
.prose pre code { padding: 0; background: none; color: inherit; font-size: inherit; }
.prose blockquote { margin: 0 0 1.25em; padding: 12px 16px; border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; background: var(--accent-soft); color: var(--note); }
.prose blockquote > :last-child { margin-bottom: 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { padding: 8px 12px; border: 1px solid var(--line); text-align: left; }
.prose th { background: var(--surface); }