/* OpenPFC web format (openpfc-html).
 *
 * Plain CSS on Quarto's theme: none. Colours, fonts and sizes come from
 * tokens.css (generated from tokens/tokens.json); no hex value is written
 * here. Alpha mixes use the -rgb triplets: rgb(var(--openpfc-paper-rgb) / .14).
 *
 * Sections: derived properties, page chrome and controls, bands and
 * headings, articles and galleries.
 */

:root {
  --openpfc-wrap: min(var(--openpfc-wrap-max), calc(100% - 2.4rem));
  --openpfc-line: rgb(var(--openpfc-text-rgb) / 0.14);
}

@media (max-width: 720px) {
  :root {
    --openpfc-wrap: min(var(--openpfc-wrap-max), calc(100% - 1.4rem));
  }
}

/* ---- Page chrome, controls, bands and headings ---- */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--openpfc-paper);
  color: var(--openpfc-text);
  font-family: var(--openpfc-font-sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-weight: 400;
  color-scheme: light;
}

img {
  max-width: 100%;
  height: auto;
}

::selection {
  background: var(--openpfc-selection);
  color: var(--openpfc-on-copper);
}

:focus-visible {
  outline: 2px solid var(--openpfc-copper);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 40;
  background: var(--openpfc-paper);
  color: var(--openpfc-ink);
  padding: 0.6rem 0.85rem;
  text-decoration: none;
}

.skip:focus {
  top: 0.7rem;
}

.wrap {
  width: var(--openpfc-wrap);
  margin-inline: auto;
}

section[id] {
  scroll-margin-top: 5.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--openpfc-ink);
  color: var(--openpfc-paper);
  border-bottom: 1px solid rgb(var(--openpfc-paper-rgb) / 0.14);
  color-scheme: dark;
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  min-height: var(--openpfc-header);
  padding: 0.65rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--openpfc-paper);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.03em;
  font-size: 1.05rem;
}

.brand img,
.mark {
  width: 28px;
  height: 28px;
  display: block;
  color: var(--openpfc-paper);
  flex: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.15rem;
}

.nav a {
  color: var(--openpfc-paper);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.4rem 0;
}

.nav a:hover,
.nav a[aria-current="location"],
.nav a[aria-current="page"] {
  color: var(--openpfc-copper-soft);
}

.nav a[aria-current="location"],
.nav a[aria-current="page"] {
  box-shadow: inset 0 -1px 0 var(--openpfc-copper);
}

.kicker {
  margin: 0 0 0.85rem;
  font-family: var(--openpfc-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--openpfc-copper-ink);
}

.band-ink .kicker {
  color: var(--openpfc-copper-soft);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.65rem 1rem;
  border: 1px solid transparent;
  text-decoration: none;
  font-family: var(--openpfc-font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
}

.btn-primary {
  background: var(--openpfc-copper);
  color: var(--openpfc-on-copper);
}

.btn-primary:hover {
  background: var(--openpfc-copper-hover);
}

.btn-primary:focus-visible {
  outline-color: var(--openpfc-paper);
}

.btn-ghost {
  border-color: rgb(var(--openpfc-paper-rgb) / 0.38);
  color: var(--openpfc-paper);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--openpfc-paper);
  background: rgb(var(--openpfc-paper-rgb) / 0.06);
}

.btn-ink {
  border-color: rgb(var(--openpfc-text-rgb) / 0.28);
  color: var(--openpfc-ink);
  background: transparent;
}

.btn-ink:hover {
  border-color: var(--openpfc-ink);
}

.band {
  padding: clamp(3.1rem, 6vw, 5.4rem) 0;
}

.band-ink {
  background: var(--openpfc-ink);
  color: var(--openpfc-paper);
  color-scheme: dark;
}

.band-ink ::selection {
  background: var(--openpfc-copper);
  color: var(--openpfc-on-copper);
}

.band-stone {
  background: var(--openpfc-stone);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
  gap: 1.5rem 2.5rem;
  align-items: end;
  margin-bottom: clamp(1.6rem, 3vw, 2.4rem);
}

h2 {
  margin: 0;
  font-family: var(--openpfc-font-serif);
  font-weight: 500;
  font-size: clamp(2.15rem, 4.4vw, 3.45rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.lede {
  margin: 0;
  max-width: 40ch;
  color: var(--openpfc-muted);
  font-size: 1.05rem;
}

.band-ink .lede {
  color: var(--openpfc-cream-dim);
}

.text-link {
  color: var(--openpfc-tide);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.band-ink .text-link {
  color: var(--openpfc-copper-soft);
}

.code-plate {
  min-width: 0;
  background: var(--openpfc-ink-2);
  color: var(--openpfc-paper);
  border: 1px solid rgb(var(--openpfc-ink-rgb) / 0.4);
}

.code-label {
  margin: 0;
  padding: 0.7rem 1rem 0;
  font-family: var(--openpfc-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--openpfc-copper-soft);
}

.code-plate pre {
  margin: 0;
  padding: 0.7rem 1rem 1rem;
  overflow-x: auto;
  font-family: var(--openpfc-font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--openpfc-paper);
}

.code-plate pre + .code-label {
  border-top: 1px solid rgb(var(--openpfc-paper-rgb) / 0.12);
  padding-top: 0.85rem;
}

blockquote {
  margin: 0;
  padding: 0 0 0 1rem;
  border-left: 2px solid var(--openpfc-copper-ink);
}

blockquote p {
  margin: 0;
  font-family: var(--openpfc-font-serif);
  font-weight: 500;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

blockquote footer {
  margin-top: 0.9rem;
  color: var(--openpfc-muted);
  font-size: 0.95rem;
}

.meta-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.meta-list li {
  padding: 0.7rem 0;
  border-top: 1px solid var(--openpfc-line);
}

.meta-list li:last-child {
  border-bottom: 1px solid var(--openpfc-line);
}

.site-footer {
  background: var(--openpfc-ink);
  color: var(--openpfc-cream-dim);
  color-scheme: dark;
  padding: 1.6rem 0 2rem;
  border-top: 1px solid rgb(var(--openpfc-paper-rgb) / 0.12);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem 1.5rem;
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
}

.site-footer a {
  color: var(--openpfc-copper-soft);
}

.legal {
  margin: 0.9rem 0 0;
  max-width: 80ch;
  font-size: 0.82rem;
  color: var(--openpfc-faint);
}

.rise.is-armed {
  opacity: 0;
  transform: translateY(12px);
}

.rise.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (max-width: 980px) {
.section-head {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {

.band {
    padding: 2.4rem 0;
  }

.section-head {
    margin-bottom: 1.15rem;
  }

.nav {
    gap: 0.15rem 0.8rem;
  }

.nav a {
    font-size: 0.92rem;
  }

.section-head {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
section[id] {
    scroll-margin-top: 9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
html {
    scroll-behavior: auto;
  }

.rise,
.rise.is-armed,
.rise.is-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media print {
.site-header {
    position: static;
  }
}

/* ---- Articles and galleries ---- */

#quarto-content { display: block; padding: 0; }

main.content { padding: 0; margin: 0; max-width: none; }

#quarto-document-content { width: 100%; }

#quarto-margin-sidebar,
#quarto-sidebar { display: none; }

.quarto-title-block,
.quarto-title-banner { display: none; }

a { color: var(--openpfc-tide); text-underline-offset: .2em; }

.site-header a,
.site-footer a { color: inherit; }

.anchorjs-link { font-family: var(--openpfc-font-sans); font-size: .6em; }

.gallery-heading { width: var(--openpfc-wrap); margin: 0 auto; padding: 5rem 0 3rem; }

.gallery-heading h1 { font-family: var(--openpfc-font-serif); font-weight: 500; font-size: clamp(3rem,6.5vw,5.6rem); line-height: 1.02; letter-spacing: -.055em; margin: .6rem 0 1.6rem; }

.gallery-deck { font-size: 1.3rem; max-width: 36em; color: var(--openpfc-muted); }

.app-grid { width: var(--openpfc-wrap); margin: 0 auto 6rem; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 2.5rem 1.6rem; }

.app-card { display: flex; flex-direction: column; color: var(--openpfc-text); text-decoration: none; border-bottom: 1px solid var(--openpfc-line); padding-bottom: 1.4rem; transition: transform .2s; }

.app-card:hover { transform: translateY(-4px); }

.app-card img { width: 100%; height: 245px; object-fit: cover; background: var(--openpfc-ink); }

.app-card video { display: block; width: 100%; height: auto; background: var(--openpfc-ink); }

a.app-status { color: var(--openpfc-copper-ink); text-decoration: none; }

.app-card-copy { padding-top: 1.2rem; }

.app-family,
.app-status { font: .68rem/1.5 var(--openpfc-font-mono); text-transform: uppercase; letter-spacing: .04em; color: var(--openpfc-copper-ink); }

.app-card h2 { font: 500 2rem/1.15 var(--openpfc-font-serif); letter-spacing: -.03em; margin: .4rem 0 .6rem; }

.app-card p { margin: 0 0 .8rem; }

.app-status { display: block; margin-top: 1rem; }

.article-opening { width: var(--openpfc-wrap); margin: 2rem auto 0; }

.article-hero { display: block; width: 100%; height: clamp(260px,43vw,560px); object-fit: cover; }

.article-video { display: block; width: 100%; height: auto; background: var(--openpfc-void); }

.article-title { padding: 2.4rem 0 2.8rem; border-bottom: 1px solid var(--openpfc-line); }

.article-title h1 { font: 500 clamp(3rem,6.5vw,5.5rem)/1.05 var(--openpfc-font-serif); letter-spacing: -.055em; margin: .4rem 0 1rem; }

.article-title .deck { font: 400 clamp(1.25rem,2vw,1.6rem)/1.45 var(--openpfc-font-sans); color: var(--openpfc-muted); max-width: 34em; }

.article-meta { font: .7rem/1.8 var(--openpfc-font-mono); color: var(--openpfc-muted); letter-spacing: .03em; text-transform: uppercase; }

.article-nav { width: var(--openpfc-wrap); margin: 0 auto; padding: 1.2rem 0; border-bottom: 1px solid var(--openpfc-line); display: flex; gap: .7rem 1.5rem; flex-wrap: wrap; font: .7rem/1.5 var(--openpfc-font-mono); }

.article-nav a { text-decoration: none; }

.article-body { width: min(1060px,calc(100% - 2.4rem)); margin: 0 auto; padding-bottom: 5rem; counter-reset: section; }

.article-body > section { margin: 4rem 0 0; }

.article-body h2 { font: 500 clamp(2rem,3.8vw,3rem)/1.15 var(--openpfc-font-serif); letter-spacing: -.035em; border-top: 1px solid var(--openpfc-line); padding-top: 2rem; margin: 0 0 1.5rem; }

.article-body > section > h2::before { counter-increment: section; content: counter(section,decimal-leading-zero) " / "; display: block; font: .7rem/1.5 var(--openpfc-font-mono); color: var(--openpfc-copper-ink); letter-spacing: .07em; margin-bottom: .75rem; }

.article-body p { max-width: 59em; }

.article-body h3 { font: 500 1.6rem/1.2 var(--openpfc-font-serif); margin-top: 2rem; }

.article-columns { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 2.5rem; align-items: start; }

.article-column { min-width: 0; width: auto !important; }

.insight { background: var(--openpfc-stone); padding: 1.8rem; border-top: 3px solid var(--openpfc-tide); }

.insight p:last-child { margin-bottom: 0; }

.insight .kicker { margin-top: 0; }

.article-body figure { margin: 1.5rem 0; }

.article-body figure img { width: 100%; height: auto; }

.article-body figcaption { text-align: left; color: var(--openpfc-muted); font-size: .86rem; line-height: 1.5; margin-top: .65rem; }

.quarto-figure { margin: 1.5rem 0; }

.figure-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1.5rem; }

.evidence-note { padding: 1rem 1.3rem; border-left: 3px solid var(--openpfc-copper); background: var(--openpfc-wash); font-size: .95rem; }

.math.display { display: block; overflow-x: auto; padding: .7rem 0; }

mjx-container[display="true"] { overflow-x: auto; overflow-y: hidden; max-width: 100%; padding: .3rem 0; }

.article-body table { border-collapse: collapse; width: 100%; font-size: .95rem; }

.article-body th { text-align: left; font-family: var(--openpfc-font-mono); font-weight: 400; font-size: .72rem; text-transform: uppercase; }

.article-body td,
.article-body th { padding: .8rem .6rem; border-bottom: 1px solid var(--openpfc-line); vertical-align: top; }

.article-body td:first-child { width: 30%; color: var(--openpfc-muted); }

.article-body .csl-entry { margin: 1rem 0; font-size: .9rem; overflow-wrap: anywhere; }

.article-body .csl-left-margin { display: inline; margin-right: .5rem; }

.article-body .csl-right-inline { display: inline; }

.feature main.content > section { width: var(--openpfc-wrap); margin: 2rem auto 4rem; }

.feature main.content > section img { max-width: 700px; }

.scope-card { padding: 1.8rem; border-top: 3px solid var(--openpfc-tide); background: var(--openpfc-stone); }

.scope-card.limitations { border-color: var(--openpfc-copper-ink); }

.scope-card h3 { margin-top: 0; }

.scope-card ul { padding-left: 1.2rem; }

.scope-card li { margin-bottom: .65rem; }

@media(max-width:900px) {
.app-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }

.nav { gap: .7rem; }
}

@media(max-width:600px) {
.app-grid { grid-template-columns: 1fr; gap: 2rem; }

.app-card img { height: 260px; }

.gallery-heading { padding-top: 3rem; }

.article-columns,
.figure-grid { grid-template-columns: 1fr; gap: 1rem; }

.article-title { padding: 1.6rem 0; }

.article-body > section { margin-top: 2.8rem; }

.article-nav { gap: .6rem 1rem; }

.article-body td,
.article-body th { padding: .6rem .3rem; }

.article-body table { font-size: .84rem; }

.article-body h2 { padding-top: 1.5rem; }

.article-opening { margin-top: 1rem; }
}

@media(prefers-reduced-motion:reduce) {
.app-card { transition: none; }

.app-card:hover { transform: none; }
}

#title-block-header { display: none; }

.article-body > h2 { margin-top: 4rem; scroll-margin-top: 6rem; }

.article-body > h2::before { counter-increment: section; content: counter(section,decimal-leading-zero) " / "; display: block; font: .7rem/1.5 var(--openpfc-font-mono); color: var(--openpfc-copper-ink); letter-spacing: .07em; margin-bottom: .75rem; }

@media(max-width:600px) {
.article-body > h2 { margin-top: 2.8rem; scroll-margin-top: 10rem; }
}

/* Pandoc's default attribute green and disclosure gray need more contrast
 * on the warm code/callout surface. Keep them inside the shared palette. */
code span.at { color: var(--openpfc-tide); }
details > summary { color: var(--openpfc-text); }

/* Long equations, commands and data tables scroll inside the article. */
.article-body :is(p, li, td) code { overflow-wrap: anywhere; }
.article-body table { display: block; max-width: 100%; overflow-x: auto; }
.math.display { max-width: 100%; min-width: 0; }
mjx-container[jax="CHTML"][display="true"] { display: block; }
.article-nav a { min-height: 24px; display: inline-flex; align-items: center; }
/* With theme:none, inactive dark syntax rules can survive Quarto's dual
 * highlight sheets for token classes that are empty in the light sheet. */
code span.bu, code span.ex { color: var(--openpfc-text); }
/* Keep source TeX readable if a browser cannot run the math renderer. */
.math { overflow-wrap: anywhere; }