@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #111111;
  --text: rgba(255, 255, 255, .88);
  --strong: #ffffff;
  --amber: #f5b800;
  --muted: rgba(255, 255, 255, .62);
  --faint: rgba(255, 255, 255, .5);
  --line: rgba(255, 255, 255, .14);
  --surface: rgba(255, 255, 255, .045);
  --size: 13px;
  --lh: 21px;
  --measure: 680px;
  --pad-x: 40px;
}

* { box-sizing: border-box; }
::selection { background: var(--amber); color: var(--bg); }

html {
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 40px;
  background: var(--bg);
  color: var(--text);
  font: var(--size)/var(--lh) "JetBrains Mono", ui-monospace, monospace;
}

a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 4px; }

h1, h2, h3, h4, p, ul, ol, pre, table, blockquote { margin: 0 0 var(--lh); }
h1, h2, h3, h4 {
  color: var(--strong);
  font-size: inherit;
  line-height: inherit;
  font-weight: 700;
  text-transform: uppercase;
}
h1::before, h2::before, h3::before, h4::before { color: var(--faint); font-weight: 400; }
h1::before { content: "# "; }
h2::before { content: "## "; }
h3::before { content: "### "; }
h4::before { content: "#### "; }
h2, h3, h4 { margin-top: calc(var(--lh) * 2); }

ul, ol { padding-left: 2ch; }
li::marker { color: var(--faint); }
ul { list-style: "- "; }
strong { color: var(--strong); }

code, pre { font: inherit; }
code { color: var(--strong); }
pre {
  overflow-x: auto;
  padding: var(--lh) 2ch;
  background: var(--surface);
  color: var(--strong);
}

table { width: 100%; border-collapse: collapse; }
caption { margin-bottom: var(--lh); color: var(--muted); text-align: left; }
th, td {
  border: 1px solid var(--line);
  padding: calc(var(--lh) / 2) 2ch;
  text-align: left;
  vertical-align: top;
}
thead th { color: var(--faint); font-weight: 400; }

blockquote { padding-left: 2ch; border-left: 1px solid var(--amber); color: var(--muted); }
blockquote p:last-child { margin-bottom: 0; }
hr { margin: calc(var(--lh) * 2) 0; border: 0; color: var(--faint); }
hr::before { content: "~*~"; }

.skip-link { position: absolute; left: 40px; top: -80px; padding: 0 1ch; background: var(--amber); color: var(--bg); }
.skip-link:focus { top: 8px; }

.page { max-width: var(--measure); margin-inline: auto; }
.site-header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 3ch; margin-bottom: calc(var(--lh) * 3); }
.site-header nav { display: flex; flex-wrap: wrap; gap: 0 3ch; }
.wordmark { color: var(--strong); font-weight: 700; }
.wordmark span { color: var(--amber); }
.muted, .lede { color: var(--muted); }
.faint { color: var(--faint); }
.section { margin-top: calc(var(--lh) * 3); }
.cursor { color: var(--amber); }
/* Cua, the mascot: two lines of block characters. Its eyes are cut out of the middle row and blink. */
.mascot { width: max-content; margin: 0 0 var(--lh); padding: 0; background: none; border: 0; overflow: visible; color: var(--amber); font-family: monospace; line-height: 1; }
.mascot .eyes { display: inline-block; position: relative; }
.mascot .eyes::after { content: "███████"; position: absolute; inset: 0; opacity: 0; }

/* Build-time Highlights markup uses these variables; no browser highlighter. */
.highlights {
  --code-background: var(--surface);
  --code-foreground: var(--strong);
  --code-comment: var(--faint);
  --code-keyword: #ff678d;
  --code-string: #5ecc71;
  --code-number: #68cdf2;
  --code-function: #9d6afb;
  --code-type: #d568ea;
  --code-variable: #ffa359;
  --code-operator: #08c0ef;
}

.defs { display: grid; grid-template-columns: 16ch 1fr; gap: 0 2ch; margin: 0 0 var(--lh); }
.defs dt { color: var(--strong); }
.defs dd { margin: 0; color: var(--muted); }

.num { text-align: right; font-variant-numeric: tabular-nums; }
.crab-row > * { color: var(--amber); }
.table-wrap { overflow-x: auto; margin-bottom: var(--lh); }
.table-wrap table { margin: 0; table-layout: fixed; }
.table-wrap th:first-child { width: 46%; }
.table-wrap .num { white-space: nowrap; }
.table-wrap th, .table-wrap td { border-width: 0 0 1px; }
.table-wrap tr > :first-child { padding-left: 0; }
.table-wrap tr > :last-child { padding-right: 0; }
.table-wrap tbody th .faint { display: block; font-weight: 400; }

.benchmark-ping {
  display: block;
  position: relative;
  width: 100%;
  height: var(--lh);
  color: var(--faint);
}
.benchmark-ping::before { content: ""; position: absolute; inset-inline: 0; top: calc(50% - .5px); height: 1px; background: var(--line); }
/* The runner's full width is the square's travel distance, excluding its size. */
.benchmark-ping > span { display: block; position: relative; width: calc(100% - 6px); height: 100%; }
.benchmark-ping > span::before { content: ""; position: absolute; left: 0; top: calc(50% - 3px); width: 6px; height: 6px; background: currentColor; }
.crab-row .benchmark-ping { color: var(--amber); }
.benchmark-explainer { display: none; color: var(--faint); }

.site-footer { margin-top: calc(var(--lh) * 4); color: var(--faint); }

/* Documentation */
/* The header is as wide as the columns under it: navigation, gap and text. */
.docs-width { max-width: calc(28ch + var(--measure)); margin-inline: auto; }
.docs { display: grid; grid-template-columns: 22ch minmax(0, var(--measure)); gap: 0 6ch; justify-content: center; }
.docs-nav { position: sticky; top: 40px; align-self: start; max-height: calc(100vh - 80px); overflow-y: auto; }
.docs-nav, .toc { scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.docs-nav > summary { display: none; }
.docs-nav p { margin: 0; color: var(--faint); }
.docs-nav ul { list-style: none; padding: 0; }
.docs-nav a { color: var(--muted); }
.docs-nav a:hover, .docs-nav a[aria-current="page"] { color: var(--amber); }
.docs-nav a[aria-current="page"]::before { content: "> "; }
.doc { min-width: 0; }
summary { cursor: pointer; list-style: none; color: var(--strong); }
summary::-webkit-details-marker { display: none; }
summary::after { content: " +"; color: var(--amber); }
details[open] > summary::after { content: " −"; }
.toc { margin-bottom: calc(var(--lh) * 2); }
.toc > summary { color: var(--faint); }
.toc ul { margin: 0; color: var(--muted); }
.toc > ul { margin-top: calc(var(--lh) / 2); }
.doc :not(pre) > code { color: var(--strong); overflow-wrap: anywhere; }
.doc table { display: block; overflow-x: auto; }
.pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 3ch; margin-top: calc(var(--lh) * 3); }
.pager span { color: var(--faint); }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .cursor { animation: blink 1s steps(1) infinite; }
  .mascot .eyes::after { animation: shut 6s steps(1) 1s infinite; }
  .benchmark-ping > span { animation: benchmark-ping var(--hello-duration) linear infinite alternate; }
  .benchmark-explainer { display: block; }
}
@keyframes benchmark-ping { from { transform: translateX(0); } to { transform: translateX(100%); } }
@keyframes blink { 50% { opacity: 0; } }
/* Twice in quick succession, then a long pause. */
@keyframes shut { 0%, 4%, 7%, 100% { opacity: 0; } 2%, 5% { opacity: 1; } }

/* Wide screens: "On this page" leaves the text for a third column and stays in view. */
@media (min-width: 1280px) {
  .docs { grid-template-columns: 22ch minmax(0, var(--measure)) 24ch; }
  .docs-width { max-width: calc(58ch + var(--measure)); }
  .doc { position: relative; }
  .toc-rail { position: absolute; top: 0; bottom: 0; left: calc(100% + 6ch); width: 24ch; }
  .toc { position: sticky; top: 40px; max-height: calc(100vh - 80px); overflow-y: auto; margin: 0; }
  .toc > summary { pointer-events: none; }
  .toc[open] > summary::after { content: none; }
  .toc a { color: var(--muted); }
  .toc a:hover { color: var(--amber); }
}

/* Narrow screens: the docs nav becomes a bar that stays at the top and opens into a menu. */
@media (max-width: 860px) {
  html { scroll-padding-top: calc(var(--lh) * 3); }
  .docs { display: block; }
  .docs-nav {
    position: sticky; top: 0; z-index: 1;
    max-height: none; overflow: visible;
    margin: 0 calc(var(--pad-x) * -1) calc(var(--lh) * 2);
    padding: 0 var(--pad-x);
    background: var(--bg);
  }
  .docs-nav > summary {
    display: block;
    padding: calc(var(--lh) / 2) 0;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  .docs-nav > summary span { color: var(--amber); }
  .docs-nav[open] > summary { color: var(--muted); }
  .docs-nav nav {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(18ch, 1fr)); gap: 0 4ch; align-items: start;
    max-height: 70dvh;
    overflow-y: auto; overscroll-behavior: contain;
    padding-bottom: var(--lh);
  }
  .docs-nav ul { margin-bottom: calc(var(--lh) / 2); }
  .docs-nav a { display: block; padding: 4px 0; }
  .toc a, .pager a, .site-header a { display: inline-block; padding: 4px 0; }
  .site-header { align-items: baseline; }
}

@media (max-width: 560px) {
  :root { --size: 14px; --lh: 22px; --pad-x: 16px; }
  body { padding: 24px var(--pad-x); }
  .skip-link { left: var(--pad-x); }
  .site-header { margin-bottom: calc(var(--lh) * 2); }
  .defs { grid-template-columns: 1fr; }
  .defs dd { margin-bottom: calc(var(--lh) / 2); }
  /* Code runs to the screen's edges, so long lines get the full width to scroll in. */
  pre, .doc table { margin-inline: calc(var(--pad-x) * -1); padding-inline: var(--pad-x); }
  .doc pre { font-size: 13px; }
  .table-wrap th, .table-wrap td { padding-inline: .5ch; }
  .table-wrap th .faint { display: block; font-size: 12px; }
  .pager { flex-direction: column; gap: calc(var(--lh) / 2); }
  .pager span:empty { display: none; }
  main a, .site-footer a { display: inline-block; min-height: 28px; }
}