/* lab theme — dark terminal aesthetic for squirrel.filed.fyi */
:root {
  --bg: #0b0f14;
  --panel: #10161d;
  --panel-2: #0d1319;
  --ink: #c9d4de;
  --bright: #eef4fa;
  --muted: #6b7a89;
  --accent: #5eead4;
  --accent2: #f0abfc;
  --rule: #1e2833;
  --code-bg: #0d1319;
  --mark: rgba(94,234,212,.22);
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

::selection { background: var(--mark); color: var(--bright); }

body {
  margin: 0 auto;
  max-width: 66rem;
  padding: 1.25rem 1.5rem 3rem;
  font-family: var(--sans);
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(94,234,212,.05), transparent),
    radial-gradient(900px 400px at -10% 10%, rgba(240,171,252,.04), transparent),
    var(--bg);
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- header ---------- */
.site-header { border-bottom: 1px solid var(--rule); padding-bottom: .9rem; margin-bottom: 1.5rem; }
.masthead { display: flex; flex-wrap: wrap; align-items: baseline; gap: .75rem 1.5rem; justify-content: space-between; }
.masthead-controls { display: flex; align-items: center; gap: .5rem; flex: 0 1 22rem; min-width: 14rem; }
.masthead-controls .search { flex: 1 1 auto; }
.site-title { font-family: var(--mono); font-size: 1.15rem; font-weight: 700; margin: 0; color: var(--bright); letter-spacing: -.01em; display: flex; align-items: center; gap: .5rem; }
.site-title .x { color: var(--accent); }
.site-mark { width: 1.35em; height: 1.35em; flex: none; }
.site-mark .fur { fill: var(--accent); }
.site-mark .tail { stroke: var(--accent); }
.site-mark .eye { fill: var(--bg); }
html[data-theme="pride"] .site-mark .fur { fill: url(#squirrel-pride); }
html[data-theme="pride"] .site-mark .tail { stroke: url(#squirrel-pride); }

/* ---------- search ---------- */
.search { position: relative; flex: 0 1 20rem; min-width: 12rem; }
.search input {
  width: 100%; background: var(--panel-2); color: var(--bright);
  border: 1px solid var(--rule); border-radius: 8px;
  font: .85rem/1.4 var(--mono); padding: .45rem .8rem;
}
.search input::placeholder { color: var(--muted); }
.search input:focus { border-color: var(--accent); outline: none; }
.search-results {
  position: absolute; z-index: 30; top: calc(100% + .4rem); right: 0;
  width: min(30rem, 90vw); max-height: 60vh; overflow: auto;
  background: var(--panel); border: 1px solid var(--rule); border-radius: 10px;
  box-shadow: 0 14px 40px rgba(0,0,0,.5); padding: .3rem;
}
.sr-item { display: block; padding: .5rem .6rem; border-radius: 8px; text-decoration: none; }
.sr-item:hover, .sr-item.is-active { background: rgba(94,234,212,.07); }
.sr-title { display: inline-block; color: var(--bright); font-weight: 600; font-size: .9rem; }
.sr-path { color: var(--muted); font-family: var(--mono); font-size: .72rem; margin-left: .5rem; }
.sr-snippet { margin: .15rem 0 0; color: var(--ink); font-size: .8rem; line-height: 1.45; }
.sr-snippet mark { background: var(--mark); color: var(--accent); padding: 0 .1em; border-radius: 3px; }
.sr-empty { color: var(--muted); font-family: var(--mono); font-size: .82rem; padding: .5rem .6rem; margin: 0; }

/* ---------- breadcrumb ---------- */
.site-breadcrumb { color: var(--muted); font-size: .8rem; font-family: var(--mono); margin-bottom: 1.1rem; }
.site-breadcrumb:has(li:only-child) { display: none; }
.site-breadcrumb a { color: var(--muted); }
.site-breadcrumb a:hover { color: var(--accent); }
.site-breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .35rem; margin: 0; padding: 0; }
.site-breadcrumb li + li::before { content: "/"; margin-right: .35rem; color: var(--rule); }
.site-breadcrumb li[aria-current] { color: var(--ink); }

/* ---------- columns ---------- */
.site-cols { display: grid; grid-template-columns: minmax(0,1fr); gap: 1.75rem; }
@media (min-width: 58rem) {
  .site-cols { grid-template-columns: 14.5rem minmax(0,1fr); }
}

.site-rail { display: none; }
@media (min-width: 58rem) {
  .site-rail { display: block; align-self: start; position: sticky; top: 1rem;
    max-height: calc(100vh - 2rem); overflow: auto; }
}

/* ---------- nav tree (boris {{nav}} markup) ---------- */
.treewrap ul { list-style: none; margin: 0; padding-left: 0; }
.treewrap ul ul { padding-left: .85rem; border-left: 1px solid var(--rule); margin-left: .3rem; }
.treewrap a {
  display: block; padding: .16rem .4rem; border-radius: 6px;
  color: var(--ink); text-decoration: none; font-size: .84rem; line-height: 1.5;
}
.treewrap a:hover { color: var(--accent); background: rgba(94,234,212,.06); }
.treewrap .is-current > a,
.treewrap a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.treewrap { padding-bottom: 1.25rem; margin-bottom: 1.25rem; border-bottom: 1px dashed var(--rule); }
.treewrap .site-nav__trunk > a { display: none; }

/* ---------- long feed lists: show first N, expand on demand ---------- */
/* theme.js marks entries past the cap with data-overflow and adds a
   "… N more" toggle. The current page's entry always stays visible. */
.treewrap ul > li.site-nav__satellite[data-overflow] { display: none; }
.treewrap ul.nav-expanded > li.site-nav__satellite[data-overflow] { display: block; }
.treewrap ul > li.site-nav__satellite.is-current,
.treewrap ul > li.site-nav__satellite.is-ancestor { display: block; }
.nav-more { margin: .2rem 0 .1rem; }
.nav-more > button {
  display: block; width: 100%; text-align: left;
  padding: .16rem .4rem; border-radius: 6px; border: 0; background: none;
  color: var(--muted); font: inherit; font-size: .8rem; cursor: pointer;
}
.nav-more > button:hover { color: var(--accent); background: rgba(94,234,212,.06); }

/* ---------- toc ---------- */
.site-toc { font-size: .86rem; }
.site-toc:empty, .page-toc:empty { display: none; }
.site-toc ul { list-style: none; margin: 0; padding: 0; }
.site-toc .page-toc__l1 > a { font-weight: 600; color: var(--bright); }
.site-toc ul ul { padding-left: .8rem; }
.site-toc a { color: var(--muted); text-decoration: none; display: block; padding: .12rem .3rem; }
.site-toc a:hover { color: var(--accent); }

/* ---------- content ---------- */
.site-content h1 { font-size: 1.65rem; color: var(--bright); margin-top: 0; letter-spacing: -.01em; scroll-margin-top: 1rem; }
.site-content h2 { font-size: 1.18rem; color: var(--bright); border-bottom: 1px solid var(--rule); padding-bottom: .3rem; margin-top: 2.1rem; scroll-margin-top: 1rem; }
.site-content h3 { font-size: 1.02rem; color: var(--bright); scroll-margin-top: 1rem; }
.site-content :is(h4,h5,h6) { color: var(--ink); scroll-margin-top: 1rem; }
.site-content a { color: var(--accent); }
.site-content a:hover { text-decoration: underline; }
.site-content a[href^="http"]::after { content: " ↗"; color: var(--muted); font-size: .8em; }
.graph-panel a[href^="http"]::after, .site-footer a[href^="http"]::after { content: none; }
.site-content strong { color: var(--bright); }
.site-content img { max-width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 8px; background: #fff; padding: .35rem; }

.site-content code { font-family: var(--mono); font-size: .85em; background: var(--code-bg); border: 1px solid var(--rule); border-radius: 4px; padding: .08em .35em; color: var(--accent2); }
.site-content pre { background: var(--code-bg); border: 1px solid var(--rule); border-radius: 8px; padding: .8rem 1rem; overflow-x: auto; line-height: 1.55; }
.site-content pre code { border: 0; padding: 0; background: transparent; color: var(--ink); font-size: .82rem; }

.site-content table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .92rem; display: block; overflow-x: auto; }
.site-content th { text-align: left; color: var(--bright); border-bottom: 1px solid var(--muted); padding: .45rem .6rem; white-space: nowrap; }
.site-content td { border-bottom: 1px solid var(--rule); padding: .45rem .6rem; vertical-align: top; }
.site-content tbody tr:hover { background: rgba(255,255,255,.02); }

blockquote { border-left: 3px solid var(--accent); margin: 1rem 0; padding: .1rem 0 .1rem 1rem; color: var(--muted); }
blockquote blockquote { border-left-color: var(--accent2); }
blockquote blockquote blockquote { border-left-color: var(--muted); }

hr { border: 0; border-top: 1px dashed var(--rule); margin: 2rem 0; }

section.footnotes { color: var(--muted); font-size: .88rem; border-top: 1px dashed var(--rule); margin-top: 2rem; }
sup.footnote-ref a { text-decoration: none; }

mark { background: var(--mark); color: var(--bright); }

/* ---------- homepage venn ---------- */
.venn { margin: 1rem auto 2.25rem; max-width: 33rem; }
.venn svg { width: 100%; height: auto; display: block; }
.venn figcaption { font-family: var(--mono); font-size: .74rem; color: var(--muted); text-align: center; margin-top: .35rem; letter-spacing: .04em; }

/* ---------- boris components ---------- */
.admonition { border: 1px solid var(--rule); border-left: 3px solid var(--accent); border-radius: 8px; background: var(--panel); padding: .65rem 1rem .75rem; margin: 1.25rem 0; }
.admonition--note { border-left-color: #7dd3fc; }
.admonition--tip { border-left-color: var(--accent); }
.admonition--info { border-left-color: #a5b4fc; }
.admonition--warning { border-left-color: #fbbf24; }
.admonition--danger { border-left-color: #f87171; }
.admonition__title { font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin: 0 0 .3rem; }
.admonition__body p:first-child { margin-top: 0; }
.admonition__body p:last-child { margin-bottom: 0; }

.details { border: 1px solid var(--rule); border-radius: 8px; background: var(--panel); padding: .55rem 1rem; margin: 1.25rem 0; }
.details summary { cursor: pointer; font-family: var(--mono); font-size: .88rem; color: var(--accent); }
.details[open] summary { margin-bottom: .35rem; }
.details__body p:first-child { margin-top: .4rem; }

/* ---------- graph panel ---------- */
.graph-panel { margin-top: 2.5rem; border-top: 1px dashed var(--rule); padding-top: 1rem; display: grid; gap: 1.25rem; }
@media (min-width: 48rem) { .graph-panel { grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); } }
.gp-block:not(:has(a)) { display: none; }
.gp-title { font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin: 0 0 .4rem; }
.graph-panel ul { list-style: none; padding-left: 0; margin: 0; font-family: var(--mono); font-size: .82rem; }
.graph-panel li { margin: .18rem 0; }
.graph-panel [data-relation-kind] a::before { content: "⟶ "; color: var(--muted); }
.graph-panel a { color: var(--accent); text-decoration: none; }
.graph-panel a:hover { text-decoration: underline; }

.semantic-relations ul, .semantic-backlinks ul, .page-children ul { margin: 0; }

/* ---------- footer ---------- */
.site-footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: .82rem; font-family: var(--mono); }
.site-footer:empty { display: none; }

/* ---------- print ---------- */
@media print {
  body { background: #fff; color: #111; max-width: none; padding: 0; }
  .site-header, .site-rail, .search, .graph-panel, .site-breadcrumb { display: none !important; }
  .site-content a { color: inherit; text-decoration: underline; }
  .site-content pre, .site-content code, .admonition, .details { border-color: #ccc; background: #fafafa; }
  .site-content h2 { border-color: #999; }
}