/* LavaUI docs, on the NPRPC site's stylesheet: the accent is the only
   difference. Plain CSS: no build step between editing and reloading. */

:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --text: #1d1f23;
  --muted: #676b73;
  --border: #e4e1dc;
  --accent: #c0322a;
  --accent-soft: #fce8e5;
  --code-bg: #f3f1ed;
  --kind: #56607a;
  --kind-bg: #eceef4;
  --shadow: 0 1px 2px rgb(0 0 0 / 5%), 0 4px 16px rgb(0 0 0 / 5%);
  /* syntax highlighting (web/code.js) */
  --syn-keyword: #a3361a;
  --syn-type: #2f5f8a;
  --syn-title: #6b3fa0;
  --syn-string: #3d7a2a;
  --syn-number: #a0611b;
  --syn-comment: #8a8d93;
  --syn-meta: #7a5d1e;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --surface: #1c1f23;
    --text: #e6e4df;
    --muted: #979ba3;
    --border: #2d3137;
    --accent: #ff7b5c;
    --accent-soft: #3d1f1a;
    --code-bg: #23272c;
    --kind: #aeb6cc;
    --kind-bg: #272c36;
    --shadow: none;
    --syn-keyword: #f0875a;
    --syn-type: #7fb4e0;
    --syn-title: #c9a2f0;
    --syn-string: #9fcf7e;
    --syn-number: #e6b56a;
    --syn-comment: #7d828b;
    --syn-meta: #d7bf7f;
  }
}

* { box-sizing: border-box; }

html { scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre { font-family: var(--mono); font-size: 0.9em; }

/* ---- frame ------------------------------------------------------------ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand span { color: var(--accent); font-weight: 500; }

.search { position: relative; flex: 1; max-width: 32rem; }
.search input {
  width: 100%;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.search-results:not(:empty) {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  right: 0;
  max-height: 70vh;
  overflow-y: auto;
  padding: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.shell {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  max-width: 80rem;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 3.6rem;
  align-self: start;
  max-height: calc(100vh - 3.6rem);
  overflow-y: auto;
  padding: 1.5rem 1rem 2rem 1.5rem;
  font-size: 0.92rem;
}
.sidebar h2 {
  margin: 1.2rem 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.sidebar h2:first-child { margin-top: 0; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a { display: block; padding: 0.2rem 0.5rem; border-radius: 6px; color: var(--text); }
.sidebar li a:hover { background: var(--accent-soft); text-decoration: none; }

main { padding: 2rem 2.5rem 4rem; min-width: 0; }

/* htmx adds this class while a request is in flight */
main.htmx-request { opacity: 0.6; transition: opacity 120ms 80ms; }

@media (max-width: 52rem) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    max-height: none;
    padding: 1rem 1.5rem 0;
    border-bottom: 1px solid var(--border);
  }
  .sidebar ul { display: flex; flex-wrap: wrap; gap: 0.25rem; }
  main { padding: 1.5rem 1.25rem 3rem; }
  .topbar { gap: 1rem; padding: 0.75rem 1rem; }
}

/* ---- page parts ------------------------------------------------------- */

.page-head h1 { margin: 0 0 0.25rem; font-size: 1.9rem; line-height: 1.25; word-break: break-word; }
.page-head { margin-bottom: 1.5rem; }
.muted { color: var(--muted); }

.crumbs { font-size: 0.88rem; color: var(--muted); margin-bottom: 0.75rem; word-break: break-word; }
.crumbs span[aria-hidden] { margin: 0 0.4rem; }

.kind {
  display: inline-block;
  padding: 0.05rem 0.45rem;
  border-radius: 999px;
  background: var(--kind-bg);
  color: var(--kind);
  font: 500 0.72rem/1.5 var(--sans);
  letter-spacing: 0.02em;
  vertical-align: middle;
}
h1 .kind { font-size: 0.8rem; vertical-align: 0.35em; }

.section-title {
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.2rem;
}

.decl {
  margin: 0 0 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.decl:target { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.decl-link { padding: 0.75rem 1.25rem; }

.signature {
  margin: 0 0 0.75rem;
  padding: 0.6rem 0.8rem;
  overflow-x: auto;
  background: var(--code-bg);
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-word;
}
.decl > :last-child { margin-bottom: 0; }

.params { margin: 0.75rem 0; display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1rem; }
.params dt { font-weight: 500; }
.params dd { margin: 0; }
.returns { margin: 0.5rem 0; }
.location { font: 0.78rem var(--mono); color: var(--muted); margin: 0.75rem 0 0; }
.undocumented { font-style: italic; font-size: 0.9rem; }
.summary { margin: 0.2rem 0 0; color: var(--muted); font-size: 0.93rem; }

.item-list, .hits, .link-list { list-style: none; margin: 0; padding: 0; }
.item-list li, .hits li {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
}
.item-list li:last-child, .hits li:last-child { border-bottom: 0; }
.search-results .hits li { padding: 0.4rem 0.5rem; }
.link-list li { padding: 0.2rem 0; }
.no-hits { margin: 0.5rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card {
  display: block;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
}
.card:hover { border-color: var(--accent); text-decoration: none; }
.card h2 { margin: 0 0 0.3rem; font-size: 1.25rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.card p.card-summary { color: var(--text); margin-bottom: 0.5rem; }

/* ---- rendered Markdown -------------------------------------------------- */

.prose { max-width: 48rem; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0.6rem 0; }
.prose .lead { font-size: 1.1rem; color: var(--muted); }
.prose h1 { font-size: 2rem; line-height: 1.25; }
.prose h2 { margin-top: 2rem; padding-bottom: 0.3rem; border-bottom: 1px solid var(--border); }
.prose code { padding: 0.1rem 0.3rem; background: var(--code-bg); border-radius: 4px; }
.prose pre { padding: 0.8rem 1rem; overflow-x: auto; background: var(--code-bg); border-radius: 8px; }
.prose pre code { padding: 0; background: none; }
.prose table { border-collapse: collapse; margin: 1rem 0; display: block; overflow-x: auto; }
.prose th, .prose td { padding: 0.4rem 0.7rem; border: 1px solid var(--border); text-align: left; }
.prose blockquote { margin: 1rem 0; padding: 0 1rem; border-left: 3px solid var(--border); color: var(--muted); }
.guide { max-width: 52rem; }

a.xref code { color: var(--accent); }

/* ---- syntax highlighting (highlight.js classes) ------------------------- */

.hljs-keyword, .hljs-built_in, .hljs-literal, .hljs-selector-tag { color: var(--syn-keyword); }
.hljs-type, .hljs-class .hljs-title { color: var(--syn-type); }
.hljs-title, .hljs-title.class_, .hljs-title.function_ { color: var(--syn-title); }
.hljs-string, .hljs-regexp, .hljs-char { color: var(--syn-string); }
.hljs-number, .hljs-symbol { color: var(--syn-number); }
.hljs-comment, .hljs-quote, .hljs-doctag { color: var(--syn-comment); font-style: italic; }
.hljs-meta, .hljs-attr, .hljs-attribute, .hljs-variable, .hljs-template-variable { color: var(--syn-meta); }
.hljs-params { color: inherit; }

/* ---- articles (/article/<slug>) ----------------------------------------
   Long-form pages with figures and diagrams. The diagrams are inline SVG
   whose fills name the tokens below, so they follow the theme like the
   text does. Prose keeps a reading measure; figures and diagrams take the
   whole column. */

:root { --cool: #356491; --cool-soft: #e2eaf3; }
@media (prefers-color-scheme: dark) {
  :root { --cool: #79addd; --cool-soft: #141d28; }
}

/* The diagrams were laid out against JetBrains Mono (OFL), and a wider
   fallback runs their labels out of their boxes. These are the subsets the
   article shipped with: Latin and the few symbols it uses, 5 KiB each. */
@font-face { font-family: "JB"; src: url(/fonts/jb-subset-400.woff2) format("woff2"); font-weight: 400; font-display: block; }
@font-face { font-family: "JB"; src: url(/fonts/jb-subset-700.woff2) format("woff2"); font-weight: 700; font-display: block; }
@font-face { font-family: "JB"; src: url(/fonts/jb-subset-800.woff2) format("woff2"); font-weight: 800; font-display: block; }

.essay {
  --mono: "JB", ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --measure: 38rem;
  --hot: var(--accent);
  --hot-soft: var(--accent-soft);
  --ink: var(--text);
  --faint: color-mix(in srgb, var(--muted) 75%, var(--bg));
  --rule: var(--border);
  --sunken: var(--code-bg);
  max-width: 56rem;
  font-size: 1.05rem;
  line-height: 1.65;
}
.essay > header,
.essay > section > p,
.essay > section > h2,
.essay > section > ul,
.essay > section > figure { max-width: var(--measure); }

.essay-head { padding: 1.5rem 0 1rem; }
.essay .eyebrow {
  display: flex; gap: 0.6rem; align-items: center;
  margin: 0 0 1.25rem;
  font: 700 0.7rem var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--hot);
}
.essay .eyebrow::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
.essay h1 {
  margin: 0 0 1.25rem;
  font: 800 clamp(2rem, 6vw, 3.2rem)/1.05 var(--mono);
  letter-spacing: -0.045em;
  text-wrap: balance;
}
.essay .standfirst { margin: 0; font-size: 1.2rem; line-height: 1.5; color: var(--muted); text-wrap: pretty; }
.essay .standfirst strong { color: var(--ink); font-weight: 600; }

.essay .figures {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 1px; margin: 2rem 0 0;
  background: var(--rule); border: 1px solid var(--rule); border-radius: 8px; overflow: hidden;
}
.essay .fig { padding: 1.2rem 1.1rem; background: var(--surface); }
.essay .fig b {
  display: block;
  font: 800 1.75rem/1.1 var(--mono); letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums; color: var(--hot);
}
.essay .fig span { display: block; margin-top: 0.4rem; font-size: 0.82rem; line-height: 1.4; color: var(--muted); }

.essay section { padding-top: 3rem; }
.essay .stage {
  margin: 0 0 0.6rem;
  font: 700 0.7rem var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--faint);
}
.essay h2 {
  margin: 0 0 1rem;
  font: 800 1.5rem/1.15 var(--mono); letter-spacing: -0.035em;
  text-wrap: balance;
}
.essay h2.essay-sub { margin-top: 2.5rem; }
.essay p { margin: 0 0 1.1rem; text-wrap: pretty; }
.essay li { margin-bottom: 0.55rem; }
.essay li::marker { color: var(--faint); }
.essay :not(pre) > code { padding: 0.08em 0.32em; background: var(--sunken); border: 1px solid var(--rule); border-radius: 4px; }

.essay figure { margin: 1.75rem 0; }
.essay figure pre {
  margin: 0; padding: 1.2rem 1.3rem; overflow-x: auto;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
  font-size: 0.83rem; line-height: 1.7;
}
.essay figcaption { margin-top: 0.7rem; font-size: 0.83rem; line-height: 1.5; color: var(--muted); }

.essay .pull {
  margin: 2rem 0; padding: 0.15rem 0 0.15rem 1.3rem;
  border-left: 2px solid var(--hot);
  font-size: 1.1rem; line-height: 1.5;
}

.essay .diagram {
  margin: 2rem 0; padding: 1.5rem 1.2rem 1.2rem; overflow-x: auto;
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
}
.essay .diagram svg { display: block; width: 100%; height: auto; min-width: 26rem; }
.essay .dlabel { font: 700 11px var(--mono); letter-spacing: 0.04em; }
.essay .dsub { font: 400 9.5px var(--mono); }

.essay .close {
  margin-top: 3.5rem; padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem; color: var(--muted);
}