/* Structured document blocks (schema_version 2).
   Renderer: templates/community/_document.html
   Loaded after app.css, so every colour comes from the existing light-dark()
   tokens and dark mode needs no separate block here. */

.doc {
  --doc-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  display: flow-root;
}

.doc-block {
  margin: 0 0 var(--sp-6);
}
.doc-block:last-child {
  margin-bottom: 0;
}

/* Author newlines survive, without opting into .preserve-lines, which carries
   the legacy 16px reading typography scoped to .research-body. */
.doc-pre-line {
  white-space: pre-line;
  overflow-wrap: anywhere;
}

/* Reading typography, matched to the post lede. */
.doc-prose > :where(p, ul, ol, blockquote) {
  max-width: var(--measure);
  color: var(--text);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.65;
}
.doc-prose > p {
  margin: 0 0 1.25rem;
}
.doc-prose > :where(h2, h3, h4, h5, h6) {
  max-width: var(--measure);
  margin: var(--sp-7) 0 var(--sp-3);
  color: var(--heading);
  line-height: 1.25;
  text-wrap: balance;
}
.doc-prose > h2 { font-size: var(--fs-xl); }
.doc-prose > h3 { font-size: var(--fs-lg); }
.doc-prose > :where(h4, h5, h6) { font-size: var(--fs-md); }
.doc-prose > :where(ul, ol) {
  margin: 0 0 1.25rem;
  padding-left: 1.4em;
}
.doc-prose li + li { margin-top: .4em; }
/* 16px matches the reading size modern.css sets for body copy; the document
   blocks restate it because they are deliberately scoped away from the
   .research-body rules that used to override them. */
.doc-prose code {
  padding: .12em .34em;
  border-radius: var(--r-sm);
  background: var(--canvas-2);
  font-family: var(--doc-mono);
  font-size: .92em;
}
.doc-prose blockquote {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-3);
  margin: 0 0 1.25rem;
  padding: var(--sp-4) var(--sp-5);
  border-left: 3px solid var(--primary-ink);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--wash);
}
.doc-prose blockquote p { margin: 0; }
.doc-quote-mark { color: var(--primary-ink); opacity: .7; }

/* Shared figure shell: listing, figure, table, equation. */
.doc-figure {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--surface);
  overflow: clip;
}
.doc-label {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--sp-2) var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--line-soft);
  background: var(--canvas-2);
}
.doc-label__name {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  color: var(--heading);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
  white-space: nowrap;
}
.doc-label__name .icon { width: 1em; height: 1em; }
.doc-label__caption {
  flex: 1 1 18ch;
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: 1.45;
}

.doc-figure__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--line-soft);
}
.doc-figure__tools {
  display: flex;
  gap: var(--sp-2);
  margin-left: auto;
}
.doc-chip {
  padding: .18em .6em;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  color: var(--faint);
  font-family: var(--doc-mono);
  font-size: var(--fs-micro);
}
.doc-chip--quiet { border-color: transparent; }

.doc-tool {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  min-height: 32px;
  padding: .25em .7em;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: var(--fs-micro);
  text-decoration: none;
  cursor: pointer;
}
.doc-tool:hover { background: var(--canvas-2); }
.doc-tool .icon { width: 1.05em; height: 1.05em; }

/* Code and other literal text. */
.doc-scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}
.doc-scroll:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: -3px;
}
/* app.css has `main pre { overflow: auto; max-width: 100% }`, which would make
   the <pre> itself the scroll container. .doc-scroll is the element that holds
   the tab stop and the accessible name, so the scrolling has to happen there:
   the listing grows to its content and .doc-scroll does the scrolling. At a
   wide viewport nothing overflows and this is invisible; it only shows on a
   narrow screen, which is exactly where it matters. */
.doc-code {
  overflow: visible;
  min-width: max-content;
  max-width: none;
  margin: 0;
  padding: var(--sp-4) var(--sp-4) var(--sp-4) 0;
  background: var(--surface);
  color: var(--text);
  font-family: var(--doc-mono);
  font-size: var(--fs-xs);
  line-height: 1.6;
  tab-size: 4;
  white-space: pre;
}
.doc-code code {
  display: block;
  counter-reset: doc-line;
  font: inherit;
}
.doc-line {
  display: block;
  counter-increment: doc-line;
}
.doc-line::before {
  content: counter(doc-line);
  position: sticky;
  left: 0;
  display: inline-block;
  width: 3.5ch;
  margin-right: 1.5ch;
  padding-right: .5ch;
  background: var(--surface);
  color: var(--faint);
  font-variant-numeric: tabular-nums;
  text-align: right;
  user-select: none;
  -webkit-user-select: none;
}
/* A trailing newline leaves one empty line in the DOM. Keep it in the text so
   copy and download return the author's bytes; just do not draw it. */
.doc-line:last-child:empty { display: none; }
.doc-line:target,
.doc-block:target > .doc-label {
  background: var(--amber-bg);
}
.doc-line:target::before { background: var(--amber-bg); color: var(--amber-text); }

/* Token classes are applied by document.js over already-escaped text nodes.
   Code is reading content, so each hue comes from an existing token and clears
   the 5.1:1 the 29 Sep contrast pass settled on for a coloured accent. --primary
   measured 4.79:1 here, which was the weakest text on the page. */
.doc-tok-comment { color: var(--faint); font-style: italic; }
.doc-tok-string { color: var(--ok-text); }
.doc-tok-number { color: var(--amber-text); }
.doc-tok-keyword { color: var(--primary-ink); font-weight: 600; }

/* Figures. */
.doc-figure__media {
  display: flex;
  justify-content: center;
  padding: var(--sp-4);
  background: var(--canvas-2);
}
.doc-figure__media img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-sm);
}
.doc-alt-text {
  margin: 0;
  padding: 0 var(--sp-4) var(--sp-4);
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: 1.55;
}
.doc-long-desc { padding: 0 var(--sp-4) var(--sp-4); }
.doc .doc-long-desc summary {
  display: block;
  color: var(--primary);
  font-size: var(--fs-sm);
  cursor: pointer;
}
.doc-figure__data,
.doc-figure__orig {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin: 0;
  padding: 0 var(--sp-4) var(--sp-4);
  font-size: var(--fs-sm);
}
.doc-pending {
  display: flex;
  align-items: center;
  gap: .5em;
  margin: 0;
  padding: var(--sp-4);
  color: var(--faint);
  font-size: var(--fs-sm);
}
.doc-warn {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .2em .6em;
  border-radius: var(--r-pill);
  background: var(--amber-bg);
  color: var(--amber-text);
  font-size: var(--fs-micro);
}

/* Tables. */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}
.doc-table :where(th, td) {
  padding: var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}
.doc-table th {
  background: var(--surface);
  color: var(--heading);
  font-weight: 600;
  white-space: nowrap;
}
.doc-table tbody tr:last-child :where(th, td) { border-bottom: 0; }
.doc-table__caption {
  padding: var(--sp-3) var(--sp-4) 0;
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: 1.45;
  text-align: left;
}
.doc-unit { color: var(--faint); font-weight: 400; }
.doc-cell--number {
  font-family: var(--doc-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
th.doc-cell--number { text-align: right; }
.doc-cell--missing {
  color: var(--faint);
  font-size: var(--fs-micro);
  font-style: italic;
}

/* Equations. */
.doc-equation__source { font-size: var(--fs-sm); }
.doc-equation__explain,
.doc-note {
  margin: 0;
  padding: var(--sp-3) var(--sp-4);
  color: var(--faint);
  font-size: var(--fs-sm);
  line-height: 1.55;
}
.doc-equation__explain { color: var(--text); }

/* Reference, file, notice and measurement all share a badge-and-body row. */
.doc-reference,
.doc-file,
.doc-notice,
.doc-measure {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--surface);
}
.doc-reference__kind,
.doc-file__icon,
.doc-notice__icon,
.doc-measure__icon {
  display: inline-flex;
  align-items: center;
  padding-top: .15em;
  gap: .4em;
  color: var(--faint);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
  white-space: nowrap;
}
.doc-reference__body > *,
.doc-file__body > *,
.doc-notice__body > *,
.doc-measure__body > * {
  margin: 0 0 var(--sp-2);
}
.doc-reference__body > :last-child,
.doc-file__body > :last-child,
.doc-notice__body > :last-child,
.doc-measure__body > :last-child {
  margin-bottom: 0;
}
.doc-reference__citation { color: var(--text); font-size: var(--fs-sm); line-height: 1.55; }
.doc-reference__value { font-size: var(--fs-sm); overflow-wrap: anywhere; }
.doc-reference__value code,
.doc-reference__commit code,
.doc-file__facts code {
  font-family: var(--doc-mono);
  font-size: .92em;
  overflow-wrap: anywhere;
}
.doc-reference__commit { color: var(--faint); font-size: var(--fs-micro); }
.doc-reference .doc-note,
.doc-measure .doc-note,
.doc-notice .doc-note {
  padding: 0;
  font-size: var(--fs-micro);
}

.doc-file__name { color: var(--heading); font-weight: 600; }
.doc-file__desc { color: var(--text); font-size: var(--fs-sm); line-height: 1.55; }
.doc-file__facts { color: var(--faint); font-size: var(--fs-micro); }

/* Notices. */
.doc-notice__title {
  margin: 0 0 var(--sp-1);
  font-size: var(--fs-md);
  line-height: 1.3;
}
.doc-notice__sub {
  margin: var(--sp-3) 0 var(--sp-1);
  color: var(--heading);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.doc-notice__body p { font-size: var(--fs-sm); line-height: 1.6; }
.doc-notice__links { display: flex; flex-wrap: wrap; gap: var(--sp-3); font-size: var(--fs-sm); }
/* Each tone's border carries its own ink, not its tint. Measured in Chromium on
   the published page: the tinted fills are 1.10 to 1.17 against the page and the
   tinted lines 1.27 to 2.25, so neither the panel nor its boundary reached the
   3:1 that WCAG 1.4.11 asks of the visual information identifying a component.
   A ratio is luminance only, which is why a clearly coloured panel can measure
   almost nothing against off-white. The inks are 6.25 (takeaway), 8.23 (stuck)
   and 7.90 (hazard), and each is already the tone's icon and title colour. */
.doc-notice--takeaway {
  border-color: var(--primary-ink);
  background: var(--wash);
}
.doc-notice--takeaway .doc-notice__icon { color: var(--primary-ink); }
.doc-notice--stuck {
  border-color: var(--amber-text);
  background: var(--amber-bg);
}
.doc-notice--stuck :where(.doc-notice__icon, .doc-notice__title, .doc-notice__sub) { color: var(--amber-text); }
.doc-notice--stuck .doc-notice__body p { color: var(--amber-text-strong); }
.doc-notice--hazard {
  border-color: var(--danger);
  background: var(--danger-bg);
}
.doc-notice--hazard :where(.doc-notice__icon, .doc-notice__title, .doc-notice__sub) { color: var(--danger); }
/* A note keeps its own muted colour on white, but --faint does not carry enough
   contrast on the tinted notice backgrounds, so each tone sets its own. */
.doc-notice--hazard .doc-note { color: var(--danger); }
.doc-notice--stuck .doc-note { color: var(--amber-text); }
.doc-notice--takeaway .doc-note { color: var(--text); }

/* Measurements. */
.doc-measure__quantity {
  color: var(--faint);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.doc-measure__value { display: flex; align-items: baseline; gap: .4em; flex-wrap: wrap; }
.doc-measure__number {
  color: var(--heading);
  font-family: var(--doc-mono);
  font-size: var(--fs-xl);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.doc-measure__unit { color: var(--text); font-size: var(--fs-md); }
.doc-measure__unit--none { color: var(--faint); font-size: var(--fs-sm); }
.doc-measure__uncertainty { color: var(--text); font-size: var(--fs-sm); }
.doc-measure__facts {
  display: grid;
  gap: var(--sp-2) var(--sp-5);
  margin: var(--sp-3) 0 var(--sp-2);
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}
.doc-measure__facts dt {
  color: var(--faint);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.doc-measure__facts dd { margin: 0; font-size: var(--fs-sm); line-height: 1.5; }

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  margin: 0;
  padding: var(--sp-2) var(--sp-4);
  border-top: 1px solid var(--line-soft);
  color: var(--faint);
  font-size: var(--fs-micro);
}
.doc-reference .doc-meta,
.doc-file .doc-meta,
.doc-notice .doc-meta,
.doc-measure .doc-meta {
  grid-column: 1 / -1;
  padding: var(--sp-2) 0 0;
}
.doc-meta__item { display: inline-flex; align-items: center; gap: .35em; }
.doc-meta a { color: inherit; }

/* Mobile: blocks run to the card edge, and nothing scrolls the page sideways. */
@media (max-width: 40rem) {
  .doc-figure,
  .doc-reference,
  .doc-file,
  .doc-notice,
  .doc-measure {
    margin-inline: calc(var(--sp-4) * -1);
    border-radius: 0;
    border-inline: 0;
  }
  .doc-label,
  .doc-figure__bar {
    padding-inline: var(--sp-4);
  }
  .doc-reference,
  .doc-file,
  .doc-notice,
  .doc-measure {
    grid-template-columns: 1fr;
    padding-inline: var(--sp-4);
  }
  .doc-code { font-size: var(--fs-micro); }
  .doc-line::before { width: 2.5ch; margin-right: 1ch; }
  .doc-measure__facts { grid-template-columns: 1fr; }
}

/* Typeset maths from the server projection. */
.doc-math {
  overflow-x: auto;
  padding: var(--sp-5) var(--sp-4);
  font-size: var(--fs-lg);
  text-align: center;
}
.doc-math math { color: var(--heading); }
.doc-equation__src-toggle { border-top: 1px solid var(--line-soft); }
.doc .doc-equation__src-toggle summary {
  display: block;
  padding: var(--sp-2) var(--sp-4);
  color: var(--faint);
  font-size: var(--fs-micro);
  cursor: pointer;
}

.doc-note--problem { color: var(--danger); }
.doc-note :where(.icon) { width: 1em; height: 1em; vertical-align: -.12em; margin-right: .35em; }
.doc-reference__state--resolved { color: var(--ok-text); }
.doc-reference__state--failed { color: var(--danger); }

.doc-measure__converted { display: flex; align-items: baseline; flex-wrap: wrap; gap: .4em; font-size: var(--fs-sm); }
.doc-measure__number--derived { font-size: var(--fs-md); color: var(--faint); }
.doc-measure__records { font-size: var(--fs-sm); }
.doc-notice__declared { font-weight: 600; }

/* Exact references (F05). */
.doc-item { position: relative; margin-bottom: var(--sp-6); }
.doc-item > .doc-block { margin-bottom: 0; }
.doc-ref {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  margin-top: var(--sp-2);
  min-height: 32px;
  padding: .2em .8em;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--faint);
  font: inherit;
  font-size: var(--fs-micro);
  cursor: pointer;
  opacity: 0;
}
.doc-item:hover .doc-ref,
.doc-ref:focus-visible,
.doc-item:focus-within .doc-ref { opacity: 1; }
@media (hover: none) { .doc-ref { opacity: 1; } }
.doc-ref:hover { border-color: var(--line-strong); color: var(--text); }
.doc-ref .icon { width: 1em; height: 1em; }

.doc-ref-panel {
  display: grid;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--primary-ink);
  border-radius: var(--r-md);
  background: var(--wash);
}
.doc-ref-panel__summary { margin: 0; color: var(--heading); font-size: var(--fs-sm); font-weight: 600; }
.doc-ref-panel__help { margin: 0; color: var(--text); font-size: var(--fs-micro); }
.doc-ref-panel__range { display: flex; gap: var(--sp-3); }
.doc-ref-panel__range label { display: grid; gap: 2px; font-size: var(--fs-micro); }
.doc-ref-panel__range input { width: 7rem; }
.doc-ref-panel__actions { display: flex; flex-wrap: wrap; gap: var(--sp-2); align-items: center; }
.doc-ref-panel__close {
  min-height: 36px;
  padding: 0 .8em;
  border: 0;
  background: none;
  color: var(--text);
  font: inherit;
  font-size: var(--fs-sm);
  text-decoration: underline;
  cursor: pointer;
}
.doc-ref-panel__status { margin: 0; font-size: var(--fs-micro); color: var(--text); }
.doc-ref-panel__status:empty { display: none; }
.doc-line.is-selected { background: var(--wash); }
.doc-line.is-selected::before { background: var(--wash); color: var(--primary-ink); }
.doc-table td.is-selected { outline: 2px solid var(--primary-ink); outline-offset: -2px; }


/* While a reference selection is open each line is a pointer target, and at the
   code line-height it would be 22px. The 29 Sep review put a 24px floor on
   pointer targets; this keeps it without changing how the listing reads at
   rest. The typed range inputs remain the keyboard path either way. */
.doc-listing.is-selecting .doc-line {
  padding-block: 1px;
  cursor: pointer;
}
.doc-listing.is-selecting .doc-line:hover { background: var(--canvas-2); }


/* The release link sits on its own line inside the publication-history
   disclosure, so it is a standalone pointer target rather than a link inside a
   sentence. It measured 23px; the 29 Sep review's remedy for this was inline
   vertical padding, which lifts it over 24 without moving anything. */
.project-history > a {
  display: inline-block;
  padding-block: 2px;
}