:root {
  color-scheme: light;
  --background: #fff;
  --surface: #f7f7fb;
  --text: #24252a;
  --muted: #6c6f7b;
  --border: #e2e3ea;
  --code: #f1f1f6;
}
:root[data-theme="dark"] { color-scheme: dark; --background: #17181d; --surface: #202127; --text: #e9e9ee; --muted: #a7a8b2; --border: #34353d; --code: #282930; }
* { box-sizing: border-box; }
html { background: var(--background); color: var(--text); font-family: var(--font-body); }
body { margin: 0; line-height: 1.65; }
a { color: var(--accent); text-underline-offset: .18em; }
img, video { max-width: 100%; height: auto; border-radius: .5rem; }
.site-header { position: sticky; z-index: 10; top: 0; display: flex; align-items: center; justify-content: space-between; min-height: 3.5rem; padding: .6rem 1rem; border-bottom: 1px solid var(--border); background: var(--background); }
.site-title { color: var(--text); font-weight: 750; text-decoration: none; }
.site-actions { display: flex; align-items: center; gap: .5rem; }
.site-search { position: relative; }
.site-search input { width: min(34vw, 22rem); padding: .45rem .65rem; border: 1px solid var(--border); border-radius: .45rem; background: var(--surface); color: var(--text); }
.search-results { position: absolute; top: calc(100% + .35rem); right: 0; display: grid; width: min(70vw, 28rem); padding: .35rem; border: 1px solid var(--border); border-radius: .45rem; background: var(--background); box-shadow: 0 .8rem 2rem #0002; }
.search-results a { padding: .4rem .5rem; text-decoration: none; }
.theme-toggle { width: 2.25rem; height: 2.25rem; border: 1px solid var(--border); border-radius: .45rem; background: var(--surface); color: var(--text); cursor: pointer; }
.site-layout { display: grid; grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width)) minmax(190px, 240px); justify-content: center; gap: 2rem; min-width: 0; padding: 1.5rem; }
.site-layout[data-left-collapsed="true"] { grid-template-columns: 2.5rem minmax(0, var(--content-width)) minmax(190px, 240px); }
.site-layout[data-right-collapsed="true"] { grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width)) 2.5rem; }
.site-layout[data-left-collapsed="true"][data-right-collapsed="true"] { grid-template-columns: 2.5rem minmax(0, var(--content-width)) 2.5rem; }
.site-sidebar, .site-toc { position: sticky; top: 5rem; align-self: start; min-width: 0; max-height: calc(100vh - 6rem); overflow: auto; }
.site-sidebar { margin-left: -1rem; }
.site-sidebar, .site-toc, .page-content pre, .page-content .math-scroll { scrollbar-color: var(--border) var(--surface); scrollbar-width: thin; }
.site-sidebar::-webkit-scrollbar, .site-toc::-webkit-scrollbar, .page-content pre::-webkit-scrollbar, .page-content .math-scroll::-webkit-scrollbar { width: .65rem; height: .65rem; }
.site-sidebar::-webkit-scrollbar-track, .site-toc::-webkit-scrollbar-track, .page-content pre::-webkit-scrollbar-track, .page-content .math-scroll::-webkit-scrollbar-track { background: var(--surface); border-radius: .4rem; }
.site-sidebar::-webkit-scrollbar-thumb, .site-toc::-webkit-scrollbar-thumb, .page-content pre::-webkit-scrollbar-thumb, .page-content .math-scroll::-webkit-scrollbar-thumb { background: var(--border); border: 2px solid var(--surface); border-radius: .4rem; }
.site-sidebar::-webkit-scrollbar-thumb:hover, .site-toc::-webkit-scrollbar-thumb:hover, .page-content pre::-webkit-scrollbar-thumb:hover, .page-content .math-scroll::-webkit-scrollbar-thumb:hover { background: var(--muted); }
.sidebar-header { display: flex; align-items: center; justify-content: space-between; gap: .35rem; min-height: 2rem; margin-bottom: .35rem; color: var(--muted); font-size: .85rem; font-weight: 700; }
.sidebar-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-toggle { flex: 0 0 auto; width: 1.75rem; height: 1.75rem; padding: 0; border: 1px solid var(--border); border-radius: .35rem; background: var(--surface); color: var(--text); cursor: pointer; font: inherit; line-height: 1; }
.sidebar-toggle:hover { border-color: var(--accent); color: var(--accent); }
.site-sidebar.is-collapsed, .site-toc.is-collapsed { overflow: visible; }
.site-sidebar.is-collapsed > :not(.sidebar-header), .site-toc.is-collapsed > :not(.sidebar-header) { display: none; }
.site-sidebar.is-collapsed .sidebar-header, .site-toc.is-collapsed .sidebar-header { justify-content: center; }
.site-sidebar.is-collapsed .sidebar-title, .site-toc.is-collapsed .sidebar-title { display: none; }
.site-sidebar.is-collapsed .sidebar-toggle, .site-toc.is-collapsed .sidebar-toggle { transform: rotate(180deg); }
.site-main { min-width: 0; overflow-x: clip; }
.nav-tree, .nav-tree ul { margin: 0; padding-left: 1rem; list-style: none; }
.nav-tree { padding-left: 0; }
.nav-file a, .nav-folder summary { display: block; padding: .2rem .35rem; border-radius: .35rem; color: var(--text); text-decoration: none; }
.nav-file a[aria-current="page"] { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); font-weight: 650; }
.nav-folder summary { cursor: pointer; font-weight: 650; }
.nav-folder summary a { color: inherit; text-decoration: none; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .35rem; color: var(--muted); font-size: .9rem; }
.page-content h1 { line-height: 1.2; margin-top: 1.2rem; }
.page-content h2, .page-content h3, .page-content h4 { scroll-margin-top: 5rem; line-height: 1.3; }
.page-content pre { overflow: auto; padding: 1rem; border-radius: .5rem; background: var(--code); }
.page-content code { font-family: var(--font-mono); }
.page-content :not(pre) > code { padding: .1rem .3rem; border-radius: .25rem; background: var(--code); }
.page-content table { width: 100%; border-collapse: collapse; }
.page-content th, .page-content td { padding: .45rem .6rem; border: 1px solid var(--border); text-align: left; }
.page-content { min-width: 0; }
.page-content .math-scroll { display: inline-block; min-width: 0; max-width: 100%; overflow-x: auto; overflow-y: hidden; vertical-align: middle; contain: layout; }
.page-content .math-scroll.math-display { display: block; width: 100%; padding-block: .15rem; }
.page-content .math-scroll .katex-display { margin: 0; overflow: visible; }
.page-content blockquote { margin-inline: 0; padding: .1rem 1rem; border-left: .25rem solid var(--border); color: var(--muted); }
.page-content .callout { border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border)); border-left-width: .3rem; border-radius: .4rem; background: color-mix(in srgb, var(--accent) 8%, transparent); color: var(--text); }
.callout-title { display: block; margin-block: .7rem .2rem; color: var(--accent); text-transform: capitalize; }
.broken-link, .math-error { color: #c33; text-decoration: underline wavy; }
.table-of-contents { font-size: .88rem; }
.table-of-contents > strong { display: block; margin-bottom: .45rem; color: var(--muted); font-size: .76rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.table-of-contents ol { margin: 0; padding: 0; list-style: none; }
.table-of-contents li { margin: .1rem 0; }
.table-of-contents li.toc-level-2 { margin-top: .42rem; }
.table-of-contents a { display: block; padding: .28rem .55rem; border-radius: .35rem; color: var(--muted); line-height: 1.45; text-decoration: none; transition: background-color .15s ease, color .15s ease; }
.table-of-contents a:hover, .table-of-contents a:focus-visible { background: var(--surface); color: var(--text); }
.table-of-contents li.toc-level-2 > a { color: var(--text); font-weight: 650; }
.table-of-contents li.toc-level-3 > a { margin-left: 1.25rem; border-left: 2px solid var(--border); padding-left: .75rem; }
.table-of-contents li.toc-level-4 > a { margin-left: 2.5rem; border-left: 2px solid var(--border); padding-left: .75rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 1050px) { .site-layout, .site-layout[data-left-collapsed="true"], .site-layout[data-right-collapsed="true"], .site-layout[data-left-collapsed="true"][data-right-collapsed="true"] { grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width)); } .site-toc { display: none; } }
@media (max-width: 760px) { .site-header { position: static; } .site-layout { display: block; padding: 1rem; } .site-sidebar { position: static; max-height: none; margin: 0 0 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); } .site-search input { width: 11rem; } }