:root {
  --bg: #fbfbf9;
  --bg-soft: #f2f2ee;
  --bg-code: #f4f3ef;
  --fg: #1f2328;
  --fg-soft: #57606a;
  --line: #deded8;
  --accent: #0b6e69;
  --accent-soft: #e3f1ef;
  --warn: #9a5b00;
  --warn-soft: #fbf1df;
  --c-com: #6e7781;
  --c-str: #0a6a3b;
  --c-key: #8250df;
  --c-num: #b35900;
  --c-kw: #cf222e;
  --side-w: 16rem;
  --measure: 70ch;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --bg-soft: #1c1f23;
    --bg-code: #1e2226;
    --fg: #e4e6e8;
    --fg-soft: #9aa3ad;
    --line: #2e333a;
    --accent: #4fc1b8;
    --accent-soft: #17302e;
    --warn: #e0a24a;
    --warn-soft: #2d2415;
    --c-com: #8b949e;
    --c-str: #7ee0a4;
    --c-key: #d2a8ff;
    --c-num: #f0a45d;
    --c-kw: #ff7b72;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

code, pre, kbd { font-family: ui-monospace, SFMono-Regular, "Cascadia Mono", Menlo, Consolas, monospace; font-size: .9em; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: .5rem; background: var(--bg); padding: .25rem .5rem; z-index: 10; }

/* header */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .6rem 1.25rem;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .5rem; color: var(--fg); text-decoration: none; font-weight: 650; letter-spacing: -.01em; }
.brand svg { width: 26px; height: 26px; flex: none; }
.brand small { font-weight: 400; color: var(--fg-soft); }
.topnav { display: flex; gap: 1.1rem; flex-wrap: wrap; font-size: .95rem; }
.topnav a { color: var(--fg-soft); text-decoration: none; }
.topnav a:hover, .topnav a[aria-current] { color: var(--fg); }
.nav-toggle { display: none; }

/* layout */
.layout { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr); max-width: 76rem; margin: 0 auto; }
.side {
  position: sticky; top: 3.2rem; align-self: start;
  max-height: calc(100vh - 3.2rem); overflow-y: auto;
  padding: 1.5rem 1rem 2rem 1.25rem;
  font-size: .92rem;
  border-right: 1px solid var(--line);
}
.side h2 { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--fg-soft); margin: 1.2rem 0 .4rem; }
.side h2:first-child { margin-top: 0; }
.side ul { list-style: none; margin: 0; padding: 0; }
.side li a { display: block; padding: .22rem .5rem; border-radius: 4px; color: var(--fg); text-decoration: none; }
.side li a:hover { background: var(--bg-soft); }
.side li a[aria-current] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.side .num { color: var(--fg-soft); font-variant-numeric: tabular-nums; margin-right: .3rem; }

.content { padding: 1.5rem 2rem 3rem; min-width: 0; }
.content > * { max-width: var(--measure); }
.content > .wide { max-width: none; }

.crumbs { font-size: .85rem; color: var(--fg-soft); margin-bottom: 1rem; }
.crumbs a { color: var(--fg-soft); }
.crumbs span[aria-hidden] { margin: 0 .35rem; }

/* typography */
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -.02em; margin: .2rem 0 1rem; }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2.2rem 0 .7rem; padding-top: .3rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 .5rem; }
h2 a.anchor, h3 a.anchor { color: var(--line); text-decoration: none; margin-left: .3rem; visibility: hidden; }
h2:hover a.anchor, h3:hover a.anchor { visibility: visible; }
p, ul, ol { margin: 0 0 1rem; }
li + li { margin-top: .25rem; }
.lead { font-size: 1.12rem; color: var(--fg-soft); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

:not(pre) > code { background: var(--bg-code); padding: .1em .35em; border-radius: 4px; }

.note, .warn { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: .75rem 1rem; border-radius: 0 6px 6px 0; margin: 0 0 1.2rem; }
.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.note p:last-child, .warn p:last-child { margin: 0; }
.note strong:first-child, .warn strong:first-child { display: block; margin-bottom: .2rem; }

/* code */
.code { position: relative; margin: 0 0 1.2rem; }
.code .lang { position: absolute; top: .35rem; left: .8rem; font: .7rem/1 ui-monospace, monospace; text-transform: uppercase; letter-spacing: .05em; color: var(--fg-soft); }
pre {
  margin: 0; padding: 1.7rem 1rem .9rem;
  background: var(--bg-code);
  border: 1px solid var(--line); border-radius: 6px;
  overflow-x: auto; line-height: 1.5;
  tab-size: 2;
}
.copy {
  position: absolute; top: .3rem; right: .4rem;
  font: .75rem system-ui, sans-serif; color: var(--fg-soft);
  background: var(--bg); border: 1px solid var(--line); border-radius: 4px;
  padding: .15rem .5rem; cursor: pointer;
}
.copy:hover { color: var(--fg); }
.tok-c { color: var(--c-com); font-style: italic; }
.tok-s { color: var(--c-str); }
.tok-k { color: var(--c-key); }
.tok-n { color: var(--c-num); }
.tok-w { color: var(--c-kw); }

/* tables */
.table { overflow-x: auto; margin: 0 0 1.2rem; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: .5rem .7rem; border-bottom: 1px solid var(--line); }
th { background: var(--bg-soft); font-weight: 600; }

/* figures */
figure { margin: 1.5rem 0; }
figure img { display: block; max-width: 100%; height: auto; margin: 0 auto; }
figcaption { font-size: .88rem; color: var(--fg-soft); text-align: center; margin-top: .5rem; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: 1rem; margin: 1.2rem 0 2rem; }
.card { display: block; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: 8px; color: var(--fg); text-decoration: none; background: var(--bg); }
.card:hover { border-color: var(--accent); }
.card b { display: block; color: var(--accent); margin-bottom: .25rem; }
.card span { font-size: .92rem; color: var(--fg-soft); }

.toc-list { padding-left: 1.2rem; }
.toc-list li { margin-bottom: .6rem; }
.toc-list p { margin: .1rem 0 0; font-size: .93rem; color: var(--fg-soft); }

dl.glossary dt { font-weight: 650; margin-top: 1.1rem; scroll-margin-top: 4rem; }
dl.glossary dd { margin: .2rem 0 0; }
.letters { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.letters a { padding: .1rem .45rem; border: 1px solid var(--line); border-radius: 4px; text-decoration: none; }

.checklist { list-style: none; padding-left: 0; }
.checklist li { padding-left: 1.6rem; position: relative; }
.checklist li::before { content: ""; position: absolute; left: 0; top: .35em; width: .9rem; height: .9rem; border: 1.5px solid var(--fg-soft); border-radius: 3px; }

/* prev/next */
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.pager a { display: block; text-decoration: none; max-width: 48%; }
.pager small { display: block; color: var(--fg-soft); font-size: .8rem; }
.pager .next { margin-left: auto; text-align: right; }

.foot { border-top: 1px solid var(--line); color: var(--fg-soft); font-size: .85rem; padding: 1.2rem 1.25rem 2rem; text-align: center; }
.foot p { margin: .2rem 0; }

@media (max-width: 860px) {
  .layout { display: block; }
  .top { flex-wrap: wrap; gap: .5rem 1rem; }
  .topnav { order: 3; width: 100%; gap: .8rem; font-size: .9rem; }
  .side { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); padding: 1rem 1.25rem; }
  .js .nav-toggle {
    display: inline-block; margin-left: auto;
    font: inherit; font-size: .9rem; color: var(--fg);
    background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: .25rem .7rem; cursor: pointer;
  }
  .js .side { display: none; }
  .js .side.open { display: block; }
  .content { padding: 1.2rem 1rem 2.5rem; }
  h1 { font-size: 1.6rem; }
  .pager a { max-width: none; }
}

@media print {
  .top, .side, .pager, .copy { display: none; }
  .layout { display: block; }
}