/* PATINA documentation styles.
   Hand written. No build step, no imports, no third party fonts.
   Design language: engraved plates, strata rules, ring cross sections,
   bronze that ages into verdigris as depth increases.

   The token block below is shared with site/assets/site.css, name for name and
   value for value. The public site and these pages are one product at two
   depths. site/tools/check-site.mjs proves the two files stay in step. */

/* ------------------------------------------------------------ tokens */
:root {
  color-scheme: dark;

  --bg:            #14110d;
  --bg-deep:       #0d0b08;
  --surface:       #1b1712;
  --surface-2:     #232019;
  --rule:          #352d24;
  --rule-strong:   #52463a;
  --edge:          #7d7161;
  --ink:           #f0e8dc;
  --ink-2:         #cdbfab;
  --ink-3:         #a4977f;
  --bronze:        #e0a463;
  --bronze-deep:   #b97a3c;
  --verdigris:     #6cc7ab;
  --verdigris-deep: #2f7d68;
  --umber:         #c08658;
  --alert:         #f0937f;
  --focus:         #ffd28f;

  --code-bg:       #100d0a;
  --code-ink:      #ece3d4;
  --code-rule:     #3a3128;
  --code-accent:   #b97a3c;

  --plate:         #191510;

  /* Tier ramp. Cold raw metal, through cast bronze and earth, into verdigris. */
  --t0: #9a9086;
  --t1: #d8b57e;
  --t2: #c9954f;
  --t3: #b6a05a;
  --t4: #a89464;
  --t5: #8aa472;
  --t6: #63b294;
  --t7: #4ab7a4;

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --radius: 3px;

  --shadow:        0 1px 0 rgba(0, 0, 0, .5);
  --sidebar-w: 17.5rem;
  --toc-w: 13rem;
  --measure: 46rem;
}

:root[data-theme="light"] {
  color-scheme: light;

  --bg:            #f3eee3;
  --bg-deep:       #e7dfd0;
  --surface:       #fdfaf3;
  --surface-2:     #f6f0e3;
  --rule:          #dcd0ba;
  --rule-strong:   #b9a888;
  --edge:          #8a7c66;
  --ink:           #1d1811;
  --ink-2:         #453c30;
  --ink-3:         #62563f;
  --bronze:        #86500f;
  --bronze-deep:   #6d4009;
  --verdigris:     #0e6250;
  --verdigris-deep: #0a4b3d;
  --umber:         #7c4a22;
  --alert:         #9b2f16;
  --focus:         #7a4a10;

  --code-bg:       #17130f;
  --code-ink:      #ece3d4;
  --code-rule:     #3a3128;
  --code-accent:   #b97a3c;

  --plate:         #fffdf7;

  --t0: #5b544c;
  --t1: #8a6117;
  --t2: #7d5410;
  --t3: #695a17;
  --t4: #61511d;
  --t5: #435f33;
  --t6: #1c6a53;
  --t7: #135f4d;

  --shadow:        0 1px 0 rgba(120, 96, 60, .18);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;

    --bg:            #f3eee3;
    --bg-deep:       #e7dfd0;
    --surface:       #fdfaf3;
    --surface-2:     #f6f0e3;
    --rule:          #dcd0ba;
    --rule-strong:   #b9a888;
    --edge:          #8a7c66;
    --ink:           #1d1811;
    --ink-2:         #453c30;
    --ink-3:         #62563f;
    --bronze:        #86500f;
    --bronze-deep:   #6d4009;
    --verdigris:     #0e6250;
    --verdigris-deep: #0a4b3d;
    --umber:         #7c4a22;
    --alert:         #9b2f16;
    --focus:         #7a4a10;

    --plate:         #fffdf7;

    --t0: #5b544c;
    --t1: #8a6117;
    --t2: #7d5410;
    --t3: #695a17;
    --t4: #61511d;
    --t5: #435f33;
    --t6: #1c6a53;
    --t7: #135f4d;

    --shadow:        0 1px 0 rgba(120, 96, 60, .18);
  }
}

/* Tier colour applied by index, so markup names a tier and never a colour. */
[data-tier="0"] { --tier-ink: var(--t0); }
[data-tier="1"] { --tier-ink: var(--t1); }
[data-tier="2"] { --tier-ink: var(--t2); }
[data-tier="3"] { --tier-ink: var(--t3); }
[data-tier="4"] { --tier-ink: var(--t4); }
[data-tier="5"] { --tier-ink: var(--t5); }
[data-tier="6"] { --tier-ink: var(--t6); }
[data-tier="7"] { --tier-ink: var(--t7); }

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 var(--sans);
  overflow-wrap: break-word;
}

/* Strata: faint horizontal layers behind the whole page, like sediment. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    color-mix(in srgb, var(--rule) 34%, transparent) 0 1px,
    transparent 1px 7rem
  );
  opacity: .5;
}

a { color: var(--bronze); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--verdigris); }

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--ink);
  padding: .6rem 1rem;
  z-index: 60;
  border: 1px solid var(--edge);
}
.skip:focus { left: .5rem; top: .5rem; }

/* ------------------------------------------------------------ topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .5rem clamp(.75rem, 2vw, 1.25rem);
  background: var(--bg-deep);
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-size: 1.05rem;
  letter-spacing: .04em;
  white-space: nowrap;
}
.brand:hover { color: var(--ink); }
.brand b { font-weight: 600; letter-spacing: .12em; }
.brand span.sub { color: var(--ink-3); font-family: var(--sans); font-size: .8rem; letter-spacing: 0; }

/* Ring cross section mark, drawn as a mask so it takes the theme colour. */
.mark {
  width: 22px;
  height: 22px;
  flex: none;
  background: linear-gradient(150deg, var(--bronze), var(--verdigris));
  -webkit-mask-image: var(--mark-svg);
  mask-image: var(--mark-svg);
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}
:root {
  --mark-svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cg fill='none' stroke='%23000' stroke-width='1.4'%3E%3Ccircle cx='12' cy='12' r='10.5'/%3E%3Ccircle cx='12' cy='12' r='7.5'/%3E%3Ccircle cx='12' cy='12' r='4.5'/%3E%3C/g%3E%3Ccircle cx='12' cy='12' r='2' fill='%23000'/%3E%3C/svg%3E");
}

.topbar .spacer { flex: 1 1 auto; }

.iconbtn {
  font: inherit;
  font-size: .82rem;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: .4rem .6rem;
  cursor: pointer;
  white-space: nowrap;
}
.iconbtn:hover { color: var(--ink); border-color: var(--bronze); }

.menubtn { display: none; }

/* ------------------------------------------------------------ search */
.search {
  position: relative;
  flex: 0 1 22rem;
  min-width: 8rem;
}
.search input {
  width: 100%;
  font: inherit;
  font-size: .9rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: .42rem .6rem;
}
.search input::placeholder { color: var(--ink-3); }
.search input:hover { border-color: var(--bronze); }

.results {
  position: absolute;
  top: calc(100% + .35rem);
  left: 0;
  right: 0;
  max-height: min(70vh, 30rem);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .45);
  padding: .3rem;
  margin: 0;
  list-style: none;
}
.results:empty { display: none; }
.results li { margin: 0; }
.results a {
  display: block;
  padding: .45rem .55rem;
  border-radius: 2px;
  text-decoration: none;
  color: var(--ink);
}
.results a:hover, .results a:focus-visible { background: var(--surface-2); }
.results .r-sec { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); }
.results .r-title { display: block; font-weight: 600; color: var(--bronze); }
.results .r-snip { display: block; font-size: .82rem; color: var(--ink-2); }
.results .r-none { padding: .5rem .55rem; color: var(--ink-2); font-size: .88rem; }
.results mark { background: color-mix(in srgb, var(--bronze) 30%, transparent); color: inherit; }

/* ------------------------------------------------------------ layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 0;
  align-items: start;
  max-width: 96rem;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 3.1rem;
  max-height: calc(100vh - 3.1rem);
  overflow-y: auto;
  padding: 1.25rem .75rem 3rem 1rem;
  border-right: 1px solid var(--rule);
}

.content {
  min-width: 0;
  padding: 1.25rem clamp(1rem, 3vw, 2.5rem) 4rem;
}
.content > article { max-width: var(--measure); }

.toc {
  position: sticky;
  top: 3.1rem;
  max-height: calc(100vh - 3.1rem);
  overflow-y: auto;
  padding: 1.5rem 1rem 3rem .5rem;
  font-size: .85rem;
}

/* ------------------------------------------------------------ sidebar nav */
.navsection { margin: 0 0 1.1rem; }
.navsection > h2 {
  font: 600 .72rem/1.3 var(--sans);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-3);
  margin: 0 0 .35rem;
  padding: 0 0 .3rem .5rem;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: baseline;
  gap: .4rem;
}
.navsection > h2 .idx {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--bronze-deep);
}
.navsection ul { list-style: none; margin: 0; padding: 0; }
.navsection li { margin: 0; }
.navsection a {
  display: block;
  padding: .28rem .5rem;
  color: var(--ink-2);
  text-decoration: none;
  font-size: .88rem;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
}
.navsection a:hover { color: var(--ink); background: var(--surface); }
.navsection a[aria-current="page"] {
  color: var(--ink);
  background: var(--surface);
  border-left-color: var(--bronze);
  font-weight: 600;
}

/* The way back to the public site, kept beside the brand where it belongs. */
.tosite {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: .3rem .55rem;
  white-space: nowrap;
}
.tosite::before { content: "\2190"; margin-right: .4rem; color: var(--bronze); }
.tosite:hover { color: var(--ink); border-color: var(--bronze); }

/* ------------------------------------------------------------ breadcrumb, pager */
.crumb {
  font-size: .8rem;
  color: var(--ink-3);
  margin: 0 0 1.1rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1rem;
}
.crumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.crumb li::after { content: "/"; margin-left: .4rem; color: var(--rule-strong); }
.crumb li:last-child::after { content: ""; }
.crumb a { color: var(--ink-3); }

/* What kind of page this is, where it sits, and how long it takes to read. */
.pagemeta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.pagemeta .kind {
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  padding: .15rem .55rem;
  cursor: help;
}
.pagemeta .kind[data-kind="normative"] { border-color: var(--bronze); color: var(--bronze); }
.pagemeta .kind[data-kind="generated"] { border-color: var(--verdigris-deep); color: var(--verdigris); }
.pagemeta .kind[data-kind="operational"] { border-color: var(--rule-strong); color: var(--ink-2); }
.pagemeta .where::before,
.pagemeta .read::before { content: "\00B7"; margin-right: .5rem; color: var(--rule-strong); }

/* A compact promise at the top of a long page. */
.willknow {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--verdigris);
  background: var(--surface);
  border-radius: var(--radius);
  padding: .85rem 1rem;
  margin: 0 0 1.6rem;
  font-size: .93rem;
}
.willknow .lbl {
  display: block;
  font: 600 .7rem/1.4 var(--sans);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--verdigris);
  margin-bottom: .35rem;
}
.willknow ul { margin: 0; padding-left: 1.1rem; }
.willknow li { margin: .2rem 0; color: var(--ink-2); }

/* Intent routes on the front page. Doorways, not a table of contents. */
.intents {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: .8rem;
  margin: 0 0 1.6rem;
  padding: 0;
  list-style: none;
}
.intents li { margin: 0; }
.intents a {
  display: block;
  height: 100%;
  padding: .9rem 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-top: 2px solid var(--rule-strong);
  border-radius: var(--radius);
  text-decoration: none;
}
.intents a:hover { border-top-color: var(--bronze); }
.intents .i-said {
  display: block;
  font-family: var(--serif);
  font-size: 1.06rem;
  color: var(--bronze);
  margin-bottom: .2rem;
}
.intents .i-desc { display: block; font-size: .87rem; color: var(--ink-2); }
.intents .i-where {
  display: block;
  margin-top: .5rem;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.pager {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  max-width: var(--measure);
}
.pager a {
  flex: 1 1 14rem;
  padding: .7rem .9rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  color: var(--ink);
}
.pager a:hover { border-color: var(--bronze); }
.pager .dir { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3); }
.pager .ttl { display: block; font-weight: 600; color: var(--bronze); }
.pager .next { text-align: right; }

/* ------------------------------------------------------------ typography */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; line-height: 1.2; color: var(--ink); }
h1 {
  font-size: clamp(1.7rem, 1.2rem + 2vw, 2.35rem);
  margin: 0 0 .35rem;
  letter-spacing: -.01em;
}
.lede {
  font-size: 1.06rem;
  color: var(--ink-2);
  margin: 0 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}
h2 {
  font-size: 1.4rem;
  margin: 2.6rem 0 .6rem;
  padding-top: .5rem;
  border-top: 1px solid var(--rule);
}
h3 { font-size: 1.1rem; margin: 1.8rem 0 .4rem; }
h4 { font-size: .95rem; margin: 1.4rem 0 .3rem; font-family: var(--sans); letter-spacing: .02em; }

p, ul, ol, dl { margin: 0 0 1rem; }
li { margin: .25rem 0; }
ul, ol { padding-left: 1.25rem; }

strong { color: var(--ink); font-weight: 600; }

.anchor {
  float: left;
  margin-left: -1.05rem;
  width: 1.05rem;
  color: var(--rule-strong);
  text-decoration: none;
  font-family: var(--mono);
  font-size: .8em;
  opacity: 0;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus-visible { opacity: 1; }
@media (max-width: 60rem) { .anchor { display: none; } }

/* ------------------------------------------------------------ code */
code {
  font-family: var(--mono);
  font-size: .88em;
  background: color-mix(in srgb, var(--rule) 45%, transparent);
  padding: .1em .32em;
  border-radius: 2px;
}

.codewrap { position: relative; margin: 0 0 1.2rem; }
pre {
  margin: 0 0 1.2rem;
  overflow-x: auto;
  background: var(--code-bg);
  color: var(--code-ink);
  border: 1px solid var(--code-rule);
  border-left: 3px solid var(--code-accent);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  font-size: .84rem;
  line-height: 1.6;
  tab-size: 2;
}
.codewrap pre { margin: 0; }
pre code { background: none; padding: 0; font-size: 1em; color: inherit; }
.codelabel {
  display: flex;
  align-items: center;
  gap: .5rem;
  font: .72rem/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--surface-2);
  border: 1px solid var(--rule);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  padding: .45rem .7rem;
}
.codelabel + pre { border-top-left-radius: 0; border-top-right-radius: 0; }
.copybtn {
  position: absolute;
  top: .4rem;
  right: .4rem;
  font: .72rem/1 var(--sans);
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--edge);
  border-radius: 2px;
  padding: .3rem .5rem;
  cursor: pointer;
}
.codelabel ~ .copybtn { top: .3rem; }
.copybtn:hover { color: var(--ink); border-color: var(--bronze); }
.copybtn[data-state="done"] { color: var(--verdigris); border-color: var(--verdigris); }

/* ------------------------------------------------------------ tables */
.tablewrap { overflow-x: auto; margin: 0 0 1.3rem; border: 1px solid var(--rule); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: .88rem; background: var(--surface); }
caption { text-align: left; font-size: .82rem; color: var(--ink-3); padding: .5rem .7rem; border-bottom: 1px solid var(--rule); }
th, td { text-align: left; padding: .5rem .7rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
thead th { background: var(--surface-2); color: var(--ink); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
tbody tr:last-child td { border-bottom: 0; }
td code, th code { white-space: nowrap; }

/* ------------------------------------------------------------ callouts */
.note, .warn, .honest {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--bronze);
  background: var(--surface);
  border-radius: var(--radius);
  padding: .85rem 1rem;
  margin: 0 0 1.3rem;
  font-size: .93rem;
}
.note > :last-child, .warn > :last-child, .honest > :last-child { margin-bottom: 0; }
.note .lbl, .warn .lbl, .honest .lbl {
  display: block;
  font: 600 .72rem/1.4 var(--sans);
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--bronze);
  margin-bottom: .2rem;
}
.warn { border-left-color: var(--alert); }
.warn .lbl { color: var(--alert); }
.honest { border-left-color: var(--verdigris); }
.honest .lbl { color: var(--verdigris); }

/* ------------------------------------------------------------ cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: .8rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}
.cards li { margin: 0; }
.cards a {
  display: block;
  height: 100%;
  padding: .85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  text-decoration: none;
}
.cards a:hover { border-color: var(--bronze); }
.cards .t { display: block; font-family: var(--serif); font-size: 1.05rem; color: var(--bronze); margin-bottom: .15rem; }
.cards .d { display: block; font-size: .87rem; color: var(--ink-2); }

/* Definition lists used for fields and parameters. */
dl.fields { margin: 0 0 1.3rem; }
dl.fields dt { font-family: var(--mono); font-size: .85rem; color: var(--bronze); margin-top: .8rem; }
dl.fields dd { margin: .15rem 0 0; color: var(--ink-2); font-size: .93rem; }

/* Step list for walkthroughs. */
ol.steps { list-style: none; padding: 0; counter-reset: step; }
ol.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.2rem 2.4rem;
  border-left: 1px solid var(--rule);
  margin-left: .9rem;
}
ol.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -.9rem;
  top: 0;
  width: 1.8rem;
  height: 1.8rem;
  display: grid;
  place-items: center;
  font: 600 .8rem/1 var(--mono);
  color: var(--bg-deep);
  background: var(--bronze);
  border-radius: 50%;
}
ol.steps > li > h3 { margin-top: .1rem; }

/* Tier strip: raw metal ageing into verdigris. The colour comes from the tier
   index, so this strip and the discs on the public site can never disagree. */
.tierstrip { display: flex; flex-wrap: wrap; gap: 2px; margin: 0 0 1.3rem; list-style: none; padding: 0; }
.tierstrip li {
  flex: 1 1 5.5rem;
  margin: 0;
  padding: .5rem .55rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--tier-ink, var(--bronze));
  font-size: .78rem;
}
.tierstrip .n { display: block; font-family: var(--serif); font-size: .98rem; color: var(--tier-ink, var(--ink)); }
.tierstrip .b { display: block; color: var(--ink-3); font-family: var(--mono); }

/* On this page. */
.toc h2 { font: 600 .72rem/1.3 var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); border: 0; margin: 0 0 .4rem; padding: 0; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--rule); }
.toc li { margin: 0; }
.toc a { display: block; padding: .22rem .6rem; color: var(--ink-3); text-decoration: none; border-left: 2px solid transparent; margin-left: -1px; }
.toc a:hover { color: var(--ink); }
.toc a.here { color: var(--ink); border-left-color: var(--bronze); }
.toc .lvl3 a { padding-left: 1.2rem; font-size: .95em; }

/* Live probe panel on the API page. */
.probe { border: 1px solid var(--rule); border-radius: var(--radius); background: var(--surface); padding: 1rem; margin: 0 0 1.4rem; }
.probe form { display: flex; flex-wrap: wrap; gap: .5rem; align-items: flex-end; }
.probe label { display: block; font-size: .8rem; color: var(--ink-2); margin-bottom: .25rem; }
.probe input {
  font: inherit; font-size: .9rem; color: var(--ink); background: var(--bg);
  border: 1px solid var(--edge); border-radius: var(--radius); padding: .45rem .6rem; min-width: 15rem; flex: 1 1 18rem;
}
.probe button {
  font: inherit; font-size: .9rem; cursor: pointer; color: var(--bg-deep); background: var(--bronze);
  border: 1px solid var(--bronze); border-radius: var(--radius); padding: .48rem .9rem; font-weight: 600;
}
.probe button:hover { background: var(--verdigris); border-color: var(--verdigris); }
.probe .state { margin: .8rem 0 0; font-size: .88rem; color: var(--ink-2); }
.probe pre { margin: .8rem 0 0; }

.footnote { font-size: .85rem; color: var(--ink-3); }
.mono { font-family: var(--mono); }
.nowrap { white-space: nowrap; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 78rem) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}

/* The backdrop only exists while the drawer is open, and only on narrow screens. */
.backdrop { display: none; }

@media (max-width: 56rem) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .menubtn { display: inline-block; }

  /*
   * The contents list becomes an overlay drawer rather than a block that
   * shoves the page down. A reader who opens it to look for a page should not
   * lose their place in the one they are on.
   */
  .sidebar {
    display: none;
    position: fixed;
    top: 3.1rem;
    left: 0;
    bottom: 0;
    z-index: 45;
    width: min(21rem, 88vw);
    max-height: none;
    overflow-y: auto;
    padding: 1rem 1rem 3rem;
    border-right: 1px solid var(--rule);
    border-bottom: 0;
    background: var(--bg-deep);
    box-shadow: 6px 0 24px rgba(0, 0, 0, .4);
  }
  .sidebar.open { display: block; }

  .backdrop {
    display: block;
    position: fixed;
    inset: 3.1rem 0 0 0;
    z-index: 44;
    background: rgba(0, 0, 0, .5);
  }
  .backdrop[hidden] { display: none; }

  .navsection a { padding: .5rem .55rem; font-size: .95rem; }

  .search { flex: 1 1 100%; order: 3; }
  .topbar { flex-wrap: wrap; }
  .brand span.sub { display: none; }
  .tosite { order: 2; }

  /* 44 pixels of target on anything driven by a finger. */
  .iconbtn { min-height: 2.75rem; }
  .copybtn { min-height: 2.4rem; }
}

/* A phone must never zoom the page just because a field took focus. */
@media (max-width: 40rem) {
  .search input,
  .probe input { font-size: 1rem; }
}

@media (max-width: 24rem) {
  body { font-size: 15px; }
  .content { padding-left: .75rem; padding-right: .75rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .copybtn, .cards a, .pager a { transition: border-color .15s ease, color .15s ease; }
}

/* The contents list a reader gets when our scripts are not running. It sits
   between the sidebar mount and the article, in ordinary document flow. */
.noscript-nav {
  grid-column: 1 / -1;
  padding: 1.25rem clamp(1rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--rule);
  background: var(--bg-deep);
  font-size: .9rem;
}
.noscript-nav p { max-width: var(--measure); color: var(--ink-2); }
.noscript-nav h2 {
  font: 600 .72rem/1.3 var(--sans);
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ink-3);
  border: 0;
  margin: 1rem 0 .3rem;
  padding: 0;
}
.noscript-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1rem;
}
.noscript-nav li { margin: 0; }

/* Windows high contrast and similar modes replace the palette wholesale, so
   anything that carried meaning in a colour alone gets a border instead. */
@media (forced-colors: active) {
  .iconbtn, .copybtn, .cards a, .pager a, .intents a, .note, .warn, .honest,
  .willknow, .probe, .tierstrip li, .pagemeta .kind {
    border: 1px solid CanvasText;
  }
  .navsection a[aria-current="page"] { border-left-color: LinkText; border-left-width: 3px; }
  .toc a.here { border-left-color: LinkText; }
  ol.steps > li::before { border: 1px solid CanvasText; }
  :focus-visible { outline: 2px solid Highlight; }
}

@media print {
  .topbar, .sidebar, .toc, .pager, .copybtn, .skip { display: none; }
  body { background: #fff; color: #000; }
  body::before { display: none; }
  .layout { display: block; }
  pre { background: #f4f4f4; color: #000; border-color: #999; }
}