/* Poppins is served locally; the site needs no remote font service. */
@font-face {
  font-family: "Poppins";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/poppins-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Poppins";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/poppins-latin-400-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Poppins";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/poppins-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Poppins";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/poppins-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Poppins";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/poppins-latin-700-normal.woff2") format("woff2");
}

:root {
  --ink: #163747;
  --muted: #536874;
  --teal: #125770;
  --teal-hover: #0d4053;
  --focus: #bd7216;
  --line: #d6e2e8;
  --control-line: #738b98;
  --paper: #ffffff;
  --white: #fff;
  --soft: #f3f7f9;
  --cyan: #3389a2;
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
  --accent: #ba1e1e;
  --danger: #9d2828;
  --page-width: 90rem;
  --editorial-width: 76rem;
  --technical-width: 90rem;
  --reading-width: 48rem; /* approximately 78ch at the base Poppins size */
  --summary-width: 72ch;
  --text-small: .875rem;
  --text-summary: 1.0625rem;
  --title-size: clamp(2rem, 1.25rem + 2.5vw, 4rem);
  --hero-size: clamp(3rem, 1.5rem + 4.6vw, 6.5rem);
  --section-gap: clamp(2.5rem, 5vw, 5rem);
  --gutter: clamp(1.5rem, 4vw, 4.5rem);
  --radius: .15rem;
  font: 100%/1.7 "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  color-scheme: light;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
img { max-width: 100%; height: auto; object-position: center; }
a { color: var(--teal); text-decoration-thickness: .08em; text-underline-offset: .2em; }
a:hover { color: var(--teal-hover); }
a:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible,
[tabindex="-1"]:focus-visible, button:focus-visible, img[role="button"]:focus-visible, figcaption[tabindex]:focus-visible, .table-scroll:focus-visible, pre:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; overflow-wrap: break-word; }
h1 { font-size: var(--title-size); letter-spacing: -.025em; margin: 0 0 1rem; }
h2 { font-size: clamp(1.3rem, 1.1rem + .5vw, 1.625rem); margin: 2rem 0 .75rem; letter-spacing: -.015em; }
h3 { font-size: 1.125rem; margin: 1.5rem 0 .5rem; }
h4, h5, h6 { font-size: 1rem; margin: 1.5rem 0 .5rem; }
strong, b { font-weight: 600; }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.5rem; margin-block: 0 1.5rem; }
li + li { margin-top: .35rem; }
li > :is(ul, ol) { margin-block: .5rem; }
li > p:last-child { margin-bottom: 0; }
dl { margin-block: 1.5rem; }
dt { font-weight: 600; }
dd { margin: .25rem 0 1rem; }
figure { margin: 1.5rem 0; }
figcaption { color: var(--muted); font-size: .875rem; margin-top: .5rem; }
blockquote { margin: 1.5rem 0; padding: .25rem 1.5rem; border-left: 3px solid var(--teal); color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin-block: 2rem; }
summary { cursor: pointer; }
button, input, select, textarea { font: inherit; color: inherit; background: var(--white); border: 1px solid var(--control-line); border-radius: var(--radius); padding: .5rem .75rem; }
button, select { min-height: 44px; }
button { cursor: pointer; }
pre { padding: 1rem; background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); overflow-x: auto; line-height: 1.6; }
code { font-size: .9em; }
nav li + li, .cards > li + li, .image-gallery > li + li, .site-footer li + li { margin-top: 0; }
[hidden] { display: none !important; }

/* A shared alignment for the site frame, headings, body and image surfaces. */
.container {
  width: calc(100% - var(--gutter) - var(--gutter));
  max-width: var(--page-width);
  margin-inline: auto;
  min-width: 0;
}
.site-header { background: var(--white); border-bottom: 1px solid var(--line); padding-block: 1.15rem; position: relative; z-index: 5; }
.site-footer { background: var(--soft); border-top: 1px solid var(--line); padding-block: 3.5rem 1.5rem; font-size: .875rem; color: var(--ink); }
.site-footer p { margin-block: 0; }
.site-footer .footer-brand { margin-bottom: 2rem; }
.site-footer .footer-brand a { display: inline-flex; padding: 0; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.footer-groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem 2rem; }
.footer-groups li { min-width: 0; }
.footer-group-label { display: block; font-weight: 600; margin-bottom: .75rem; }
.site-footer a { display: flex; align-items: center; min-height: 44px; padding: .45rem 0; border-radius: var(--radius); color: var(--teal); text-decoration: none; overflow-wrap: anywhere; }
.site-footer a:is(:hover, :focus-visible) { color: var(--ink); text-decoration: underline; }

.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 2rem; border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 2rem; }
.footer-copyright { color: var(--muted); font-size: var(--text-small); }
.footer-utilities ul { display: flex; flex-wrap: wrap; gap: .5rem 1rem; }
.main-container { padding-block: 1.5rem 4rem; }
/* Width roles separate composition from text measure. Wide media never inherit
   a paragraph restriction. Reading content is centred within the shared frame. */
.width-full, .width-technical { width: 100%; max-width: var(--technical-width); margin-inline: auto; }
.width-editorial { width: 100%; max-width: var(--editorial-width); margin-inline: auto; }
.width-reading { width: 100%; max-width: var(--reading-width); margin-inline: auto; }
.index-intro { display: grid; grid-template-columns: 1.15fr 1fr; align-items: end; gap: 2rem 4rem; margin: .5rem 0 2rem; padding: 2rem 0 2.5rem; border-bottom: 1px solid var(--line); }
.index-intro h1 { max-width: 20ch; margin: 0; }
.index-intro p { max-width: var(--summary-width); font-size: var(--text-summary); color: var(--muted); margin: 0; }
.index-navigation ul { list-style: none; margin: 0; padding: 0; }
.index-pages[class*="columns-"] { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.index-pages li { min-width: 0; }
.index-group-label { display: block; font-size: 1rem; font-weight: 600; margin-bottom: .5rem; padding-bottom: .75rem; border-bottom: 1px solid var(--line); }
.index-navigation a, .link-grid a { display: flex; align-items: center; width: 100%; min-height: 44px; overflow-wrap: anywhere; text-decoration: none; }
.index-navigation a:is(:hover, :focus-visible), .link-grid a:is(:hover, :focus-visible) { background: var(--soft); text-decoration: underline; }
.index-navigation a { padding: .625rem 0; border-radius: var(--radius); }
.index-pages > li > ul > li + li { border-top: 1px solid var(--line); }

/* Editorial landing pages share source-backed route lists, with a complete
   browse section drawn from the existing navigation configuration. */
.landing-page > :is(section, .index-navigation) { margin-block: var(--section-gap); }
.landing-page > :is(section, .index-navigation) + :is(section, .index-navigation) { padding-top: 1rem; }
.resource-paths { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1.5rem 2.5rem; }
.resource-paths li { min-width: 0; margin-top: 0; padding-top: 1rem; border-top: 1px solid var(--line); }
.resource-paths h3 { font-size: 1.0625rem; line-height: 1.5; margin: 0 0 .5rem; }
.resource-paths a { display: inline-flex; align-items: center; min-height: 44px; }
.resource-paths p, .group-description { font-size: .9375rem; color: var(--muted); }
.resource-paths.learning-path { list-style: decimal; grid-template-columns: repeat(3, minmax(0, 1fr)); padding-left: 1.5rem; column-gap: 3rem; }
.learning-path li::marker { font: .8rem var(--mono); color: var(--muted); }
.learning-path h3 { margin-bottom: 0; }
.landing-page > section > p { max-width: var(--reading-width); }

/* The home is a sequence of open editorial scenes. Depth belongs to the
   explanatory architecture; the surrounding interface remains quiet. */
.home-hero { display: grid; grid-template-columns: .9fr 1.1fr; gap: 1rem 2rem; align-items: start; padding-block: clamp(2rem, 4vw, 4rem) 4rem; }
.hero-copy { padding-top: 1rem; }
.home-hero h1 { font-size: var(--hero-size); font-weight: 500; line-height: 1.06; letter-spacing: -.06em; margin: 1rem 0 1.75rem; }
.home-hero h1 span { display: block; color: var(--teal); }
.hero-statement { max-width: 39ch; font-size: clamp(1.0625rem, .95rem + .35vw, 1.25rem); line-height: 1.6; }
.hero-definition { max-width: 51ch; color: var(--muted); font-size: .875rem; margin-top: 1.5rem; }
.action-links ul { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem; list-style: none; padding: 0; margin: 1.5rem 0 0; }
.link-arrow { display: inline-block; width: 1rem; height: 1rem; flex: 0 0 1rem; }
.action-links a { display: inline-flex; gap: 1.25rem; align-items: center; justify-content: space-between; min-height: 48px; padding: .75rem 1rem; font-size: .9375rem; font-weight: 500; }
.action-links a:not(.primary-action) { text-decoration: none; border-bottom: 1px solid var(--control-line); }
.action-links a:not(.primary-action):hover { text-decoration: underline; }
.technical-label, .diagram-label { font: .6875rem/1.6 var(--mono); text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.memory-architecture { min-width: 0; width: 100%; margin: 0; }
.memory-drawing { position: relative; }
.diagram-label { display: flex; justify-content: space-between; gap: 1rem; margin: 0; padding: .75rem 0; border-top: 1px solid var(--line); }
.memory-svg { display: block; width: 100%; height: auto; overflow: hidden; }
.memory-architecture figcaption { margin-top: -.5rem; color: var(--ink); }
.memory-caption-head { display: flex; justify-content: space-between; align-items: baseline; gap: .75rem; flex-wrap: wrap; }
.memory-caption-head h2 { margin: 0; font-size: 1.125rem; }
.memory-caption-head p { margin: 0; }
.memory-controls { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1rem; }
.memory-controls button { flex: 1 1 auto; font-size: .75rem; min-height: 44px; padding: .5rem .625rem; background: transparent; }
.memory-controls button[aria-pressed="true"] { background: var(--teal); color: var(--white); border-color: var(--teal); }
.memory-explanation { min-height: 7rem; padding-top: 1rem; }
.memory-explanation h3 { margin: 0 0 .5rem; font-size: .875rem; }
.memory-explanation p, .memory-notes { font-size: .8125rem; line-height: 1.7; }
.memory-explanation p { margin: 0; }
.memory-notes summary { min-height: 44px; padding-block: .5rem; color: var(--teal); }
.memory-notes p, .memory-notes dl { margin-block: .75rem; }
.memory-architecture .authorised-cell .cell-top { fill: #d8edf3; stroke: #79aebe; }
.memory-access, .memory-rejection, .memory-write-rejection, .memory-compartment { opacity: 0; transition: opacity 220ms ease; }
[data-state="permitted"] .memory-access, [data-state="rejected"] .memory-rejection, [data-state="readonly"] .memory-write-rejection, [data-state="compartments"] .memory-compartment { opacity: 1; }
[data-state="compartments"] .compartment-cell .cell-top { fill: #c6dee8; }
[data-state="readonly"] .memory-boundary { stroke-dasharray: 4 3; }
.home-scene { display: grid; grid-template-columns: 1.05fr 1fr; gap: 2rem 5rem; align-items: start; padding-block: var(--section-gap); }
.scene-heading h2, .home-pathways > h2 { max-width: 21ch; font-size: clamp(1.875rem, 1.1rem + 2vw, 3.25rem); font-weight: 500; line-height: 1.2; letter-spacing: -.04em; margin: .75rem 0 0; }
.scene-introduction { padding-top: 1.75rem; }
.scene-introduction > p { max-width: 63ch; }
.home-purpose { font-weight: 500; }
.text-action { display: inline-flex; align-items: center; gap: 1rem; min-height: 44px; font-size: .9375rem; font-weight: 500; }
.home-topics, .scene-wide { grid-column: 1 / -1; min-width: 0; }
.home-topics { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem 3rem; }
.home-topics li { margin: 0; border-top: 1px solid var(--line); padding-top: 1rem; min-width: 0; }
.home-topics h3 { margin-top: .75rem; }
.home-topics p, .home-journeys p { font-size: .9375rem; color: var(--muted); }
.home-practice { background: var(--soft); box-shadow: 0 0 0 100vmax var(--soft); clip-path: inset(0 -100vmax); }
.home-practice .cards { gap: 2rem; }
.home-practice .card { border: 0; background: transparent; }
.home-practice .card img { aspect-ratio: 4 / 3; background: white; padding: 1rem; }
.home-practice .card-text { padding: 1.25rem 0 0; }
.home-practice .card-text h3 { font-size: 1.25rem; }
.section-afterword { margin: 2rem 0 0; }
.home-ecosystem .resource-paths { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.home-pathways { padding-block: var(--section-gap); }
.home-journeys { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem 3rem; list-style: none; padding: 0; margin: 2.5rem 0 0; }
.home-journeys > li { min-width: 0; margin: 0; }
.home-journeys > li:nth-child(n+4) { grid-column: span 1; border-top: 1px solid var(--line); padding-top: 1rem; }
.home-journeys h3 { margin: 0 0 1rem; }
.home-journeys > li:nth-child(-n+3) h3 { font-size: clamp(1.75rem, 1rem + 2vw, 3rem); font-weight: 500; letter-spacing: -.035em; }
.home-journeys a { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 44px; text-decoration: none; }
.home-journeys a:hover { text-decoration: underline; }
.home-alliance { border-top: 1px solid var(--line); }
.member-strip { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: center; gap: 1.5rem; padding: 0; margin: 1.5rem 0 2.5rem; list-style: none; }
.member-strip li { min-width: 0; margin: 0; }
.member-strip a { display: flex; min-height: 80px; align-items: center; justify-content: center; }
.member-strip img { width: 100%; height: 4rem; object-fit: contain; background: var(--image-background, transparent); }
.recent-activity { padding-block: var(--section-gap); }
.recent-activity > h2 { margin: 0 0 2rem; font-size: clamp(1.75rem, 1.2rem + 1.5vw, 2.5rem); font-weight: 500; letter-spacing: -.035em; }
.activity-columns { display: grid; gap: 2rem 5rem; grid-template-columns: 1.1fr 1fr; }
.activity-columns h3 { margin: 0 0 1rem; font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.activity-list { list-style: none; margin: 0 0 1.25rem; padding: 0; }
.activity-list li { border-top: 1px solid var(--line); padding: 1.25rem 0; margin: 0; }
.activity-list h4 { font-size: 1.0625rem; line-height: 1.5; margin: 0 0 .5rem; }
.activity-list .card-meta { margin: .25rem 0; color: var(--muted); font-size: .8125rem; }
.home-future { padding: var(--section-gap) 0; margin-block: 1rem 3rem; border-block: 1px solid var(--line); }
.home-future h2 { max-width: 25ch; margin: 1rem 0 2rem; font-size: clamp(2rem, 1.1rem + 3.5vw, 4.75rem); line-height: 1.15; font-weight: 500; letter-spacing: -.045em; }
.home-page .index-pages { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1.5rem; }
.home-page .index-navigation a { min-height: 56px; font-weight: 500; }
.home-page :is(section, li) { min-width: 0; }

.header-row { margin: 0; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.brand img { display: block; width: 10.5rem; height: auto; }
.skip-link { position: fixed; top: -5rem; left: 1rem; padding: .7rem; background: var(--ink); color: white; z-index: 20; }
.skip-link:focus { top: 1rem; outline: 3px solid var(--focus); outline-offset: 3px; }
.skip-link:hover { color: var(--white); }

.nav-panel {
  background: var(--paper);
  border-left: 2px solid var(--line);
  padding: .5rem 1rem;
  margin: .35rem 0;
}
.nav-panel a { display: inline-block; padding-block: .15rem; }
.section-link { font-weight: 600; }

/* Starter-kit style column menus, with native disclosures as the fallback. */
.navigation-toggle {
  align-items: center;
  display: flex;
  gap: .5rem;
  min-height: 2.75rem;
  padding: .5rem .75rem;
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.navigation-toggle span { font-size: 1.3rem; line-height: 1; }
.navigation-toggle:hover { background: #dbeaf1; }
.source-nav { margin-block: .75rem; }
.site-header > .container { position: relative; }
.source-nav ul { list-style: none; padding: 0; margin: 0; }
.source-nav li { min-width: 0; }
.source-nav a { text-decoration: none; overflow-wrap: anywhere; }
.source-nav summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  min-height: 2.75rem;
  padding: .6rem .75rem;
  cursor: pointer;
  font-weight: 600;
  border-radius: var(--radius);
  list-style: none;
}
.source-nav summary::-webkit-details-marker { display: none; }
.source-nav summary::after {
  content: "";
  flex: 0 0 .4rem;
  height: .4rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: -.2rem;
}
.source-nav details[open] > summary::after { transform: rotate(225deg); margin-top: .2rem; }
.source-nav :is(a, summary):is(:hover, :focus-visible) { background: var(--soft); }
.primary-menu[open] > summary { background: var(--soft); }
.primary-menu > .current-section { color: var(--teal); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .4em; }
.primary-menu-panel { background: var(--white); border: 1px solid var(--line); padding: 1rem; }
.primary-menu-panel a { display: flex; align-items: center; min-height: 2.75rem; padding: .5rem .75rem; }
.primary-menu-panel > .section-link { border-bottom: 1px solid var(--line); margin-bottom: .5rem; }
.menu-group-label { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 1rem .75rem .75rem; }
.menu-links .has-children { margin-bottom: 1rem; }
.menu-links .has-children > a, .nested-menu-label { font-weight: 600; }
.nested-menu-label { display: block; padding: .5rem .75rem; }
.menu-links .menu-links { border-left: 1px solid var(--line); margin: .25rem 0 .75rem .75rem; padding-left: .25rem; }
.menu-links .menu-links a { font-size: .875rem; }
.menu-status { display: inline-block; margin-inline: .75rem; padding: .1rem .35rem; font: .6875rem var(--mono); border: 1px solid var(--line); color: var(--muted); }
.menu-links li:has(> .menu-status) > a { display: inline-flex; }
/* Reserve the enhanced mobile frame before deferred menu code runs. If it
   fails, the head's DOMContentLoaded fallback restores native disclosures. */
@media (max-width: 63.999rem) {
  .navigation-enhanced #header-navigation:not([data-navigation-ready]) { display: none; }
  .navigation-enhanced #navigation-toggle[hidden] { display: flex !important; }
  .primary-menu-panel { max-height: min(42rem, 65dvh); overflow: auto; overscroll-behavior: contain; }
}
@media (min-width: 40.001rem) {
  .menu-group-wide > .menu-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .25rem 1.5rem; }
  .menu-group-wide > .menu-links > :first-child:not(.has-children) { grid-column: 1 / -1; }
}
@media (min-width: 40.001rem) and (max-width: 63.999rem) {
  .index-pages > .menu-group-wide { grid-column: 1 / -1; }
  .index-pages > .menu-group-technology { grid-column: auto; }
}
@media (min-width: 64rem) {
  .footer-groups { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .index-pages.columns-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .index-pages.columns-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .home-page .index-pages { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1.5rem; }
  .site-header > .container {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: .75rem 1.5rem;
  }
  #header-navigation { display: contents; }
  .source-nav { margin: 0; min-width: 0; font-size: .9375rem; }
  .primary-menu-list { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: .25rem; }
  .primary-menu > summary { white-space: nowrap; padding-inline: .625rem; }
  .primary-menu-list > li > a { display: flex; align-items: center; min-height: 2.75rem; padding: .6rem .75rem; }
  .primary-menu-panel {
    position: absolute;
    top: 100%;
    left: auto;
    right: 0;
    width: 100%;
    z-index: 10;
    padding: 1.5rem;
    max-height: min(52rem, calc(100dvh - var(--menu-top, 9rem) - 1rem));
    overflow: auto;
    overscroll-behavior: contain;
    box-shadow: 0 1.5rem 3rem #16374718;
  }
  .menu-groups { display: grid; gap: 1.25rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .menu-groups.columns-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .build-menu .menu-groups { grid-template-columns: .95fr 1.1fr 1.6fr; }
  .index-pages:has(> .menu-group-wide) { grid-template-columns: .95fr 1.1fr 1.6fr; }
  .menu-group + .menu-group { border-left: 1px solid var(--line); padding-left: 1rem; }

}

@media (min-width: 40.001rem) and (max-width: 79.999rem) {
  .menu-group-technology > .menu-links { grid-template-columns: minmax(0, 1fr); }
}
@media (min-width: 80rem) {
  .build-menu .menu-groups, .index-pages:has(> .menu-group-technology) { grid-template-columns: .85fr 1.6fr 1.8fr; }
}

.breadcrumb { margin-bottom: 1rem; font-size: var(--text-small); color: var(--muted); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: .3rem .6rem; list-style: none; margin: 0; padding: 0; }
.breadcrumb li { display: inline-flex; align-items: center; min-height: 44px; min-width: 0; max-width: 100%; overflow-wrap: anywhere; }
.breadcrumb li + li::before { content: ''; display: inline-block; width: .35rem; height: .35rem; margin: 0 .65rem .1rem 0; border: solid var(--muted); border-width: 0 1px 1px 0; transform: rotate(-45deg); }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.record-header { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 1rem 0 2rem; }
article[data-collection="pages"]:has(.listing) .record-header { padding-block: 0 1rem; margin-bottom: 1rem; }
article[data-collection="pages"]:has(.listing) .record-header .summary { margin-bottom: 0; }
.record-intro { flex: 1 1 0; min-width: 0; margin: 0; }
.eyebrow { font-size: .75rem; font-weight: 600; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 0 0 .5rem; }
.summary { font-size: var(--text-summary); color: var(--muted); }
.ordinary-page .record-header { border-bottom: 1px solid var(--line); margin-bottom: 1.5rem; padding: 0 0 1.5rem; }
article[data-collection="pages"] .record-intro { display: grid; grid-template-columns: 1.15fr 1fr; gap: 1rem 4rem; align-items: end; }
article[data-collection="pages"] .record-intro h1 { max-width: 28ch; margin: 0; }
article[data-collection="pages"] .record-intro:not(:has(.summary)) { display: block; }
.ordinary-page .summary { max-width: var(--summary-width); margin-bottom: 0; }
.lead-image { display: block; flex: 0 1 30%; min-width: 0; width: 100%; height: auto; max-height: 20rem; object-fit: contain; background: var(--image-background, var(--soft)); border-radius: .5rem; }
.image-logo, .logo-gallery { --image-background: transparent; }
img[data-image-background="dark"] { --image-background: var(--ink); }
.lead-image.image-logo, .card img.image-logo { padding: 1rem; }

/* Detail headers keep the title, existing introduction and useful actions
   together, with bounded artwork rather than an oversized brand panel. */
.collection-detail .record-header { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .75rem 2rem; align-items: start; padding: 0 0 1.5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--line); }
.collection-detail .record-header:not(.has-image) { grid-template-columns: minmax(0, 1fr); }
.collection-detail .record-intro { grid-column: 1; }
.collection-detail .record-intro h1 { max-width: 34ch; font-size: clamp(2rem, 1.5rem + 1.8vw, 3.5rem); }
.collection-detail .record-intro > :last-child { margin-bottom: 0; }
.collection-detail .record-header:not(.has-image) .record-intro:has(.summary, .detail-introduction) { display: grid; grid-template-columns: 1.15fr 1fr; gap: .75rem 4rem; align-items: end; }
.collection-detail .record-header:not(.has-image) .record-intro > .eyebrow { grid-column: 1 / -1; }
.collection-detail .record-header:not(.has-image) .record-intro:has(.summary, .detail-introduction) h1 { grid-column: 1; margin-bottom: 0; }
.collection-detail .record-header:not(.has-image) .record-intro > :is(.summary, .detail-introduction) { grid-column: 2; }
.collection-detail :is(.summary, .detail-introduction) { max-width: var(--reading-width); }
.collection-detail .record-header .lead-image { grid-column: 2; grid-row: 1; width: min(24rem, 30vw); max-width: 100%; align-self: start; }
.collection-detail .record-header.has-actions .lead-image { grid-row: 1 / 3; }
.collection-detail[data-collection="people"] .record-header .lead-image { width: 9rem; }
.collection-detail[data-collection="organisations"] .record-header .lead-image { width: 14rem; padding: .5rem; }
.collection-detail .metadata { max-width: var(--reading-width); margin: 0 auto 2rem; font-size: .9375rem; border: 0; padding: 0; }
.collection-detail .metadata h2 { font-size: 1rem; margin-bottom: .75rem; }
.collection-detail .metadata dl { grid-template-columns: minmax(7rem, 10rem) minmax(0, 1fr); gap: .5rem 1.25rem; }
.collection-detail .metadata dt { font-size: .875rem; }
.collection-detail .metadata .reference-links a { display: inline-block; min-height: 44px; padding-block: .125rem; }

.metadata { margin: 0 0 2.5rem; padding-block: 1.5rem; border-block: 1px solid var(--line); }
.metadata h2 { font-size: 1.13rem; margin: 0 0 1rem; }
.metadata dl, dl.organisation-details, dl.record-properties { display: grid; grid-template-columns: minmax(8rem, 12rem) minmax(0, 1fr); gap: .85rem 1.5rem; margin: 0; }
.metadata dt, .organisation-details dt, .record-properties dt { font-size: .9375rem; font-weight: 600; color: var(--muted); }
.metadata :is(dt, dd), .organisation-details :is(dt, dd), .record-properties :is(dt, dd) { min-width: 0; overflow-wrap: anywhere; }
.metadata dd, .organisation-details dd, .record-properties dd { margin: 0; }
.reference-links { display: flex; flex-wrap: wrap; gap: .2rem 1rem; list-style: none; margin: 0; padding: 0; }
.reference-links li { margin-top: 0; min-width: 0; max-width: 100%; }
.article-content .legal-clauses { list-style: none; padding-left: 0; }
.article-content .legal-clauses > li { margin: 1rem 0; }
.article-content .legal-clauses .legal-clauses { padding-left: 1.5rem; }
.clause-number { font-weight: 600; margin-right: .35em; }
dl.organisation-details, dl.record-properties { clear: both; margin-block: 1rem 1.75rem; }
.resource-links { margin: 0 0 1.75rem; }
.metadata .resource-links { margin: .65rem 0 0; }
.resource-links ul { display: flex; flex-wrap: wrap; gap: .2rem 1.5rem; list-style: none; margin: 0; padding: 0; }
.resource-links li { min-width: 0; max-width: 100%; }
.resource-links a { display: inline-flex; align-items: center; min-height: 44px; padding: .4rem .75rem; border: 1px solid var(--line); border-radius: .3rem; background: var(--white); text-decoration: none; overflow-wrap: anywhere; }
.resource-links a:is(:hover, :focus-visible) { background: var(--soft); text-decoration: underline; }
.record-actions { grid-column: 1; margin: .25rem 0 0; }
.record-actions ul { align-items: center; gap: .5rem 1rem; }
.record-actions a { border: 0; padding: .4rem .5rem; background: transparent; font-size: .9375rem; text-decoration: underline; }


/* Independent prose blocks keep their reading measure beside floats. Images,
   galleries, code and tables retain the wider article container. */
.article-content { display: flow-root; width: 100%; min-width: 0; overflow-wrap: break-word; }
.article-content > :is(p, ul, ol, dl, blockquote):not(.image-gallery, .cards, .link-grid):not(:has(img)) { max-width: var(--reading-width); margin-inline: auto; }
.article-content > :is(p, ul, ol, blockquote):not(.image-gallery, .cards, .link-grid):not(:has(img)) { display: flow-root; }
.article-content:empty { display: none; }
.ordinary-page .article-content > :last-child { margin-bottom: 0; }
.article-content :is(h1, h2, h3, h4, h5, h6, hr, section, .cards) { clear: both; }
.article-content > :is(h2, h3, h4, h5, h6) { max-width: var(--reading-width); margin-inline: auto; }
.article-content > pre { max-width: var(--editorial-width); margin-inline: auto; }
.article-content img { display: block; max-width: 100%; height: auto; object-fit: contain; background: var(--image-background, var(--soft)); margin: 1.5rem 0; border-radius: .3rem; }
.article-content figure { max-width: 100%; margin: 1.5rem 0; }
.article-content figure img { margin: 0; width: 100%; }
.article-content figure > p { margin: 0; }
.article-content figcaption { font-size: .88rem; color: var(--muted); margin-top: .35rem; }
.article-content :is(img, figure):is(.image-left, .image-right) {
  clear: both;
  width: 42%;
}
.article-content :is(img, figure).image-left {
  float: left;
  margin: .35rem 1.5rem 1rem 0;
}
.article-content :is(img, figure).image-right {
  float: right;
  margin: .35rem 0 1rem 1.5rem;
}
.article-content :is(img, figure).image-full {
  clear: both;
  float: none;
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 1.5rem 0;
}
.article-content img.image-logo { width: auto; max-width: min(100%, 14rem); max-height: 8rem; object-fit: contain; }
.article-content img.image-icon { width: auto; max-width: min(100%, 6rem); max-height: 3rem; object-fit: contain; }

/* A single grid for exceptional image sequences and imported directories. */
.article-content .image-gallery {
  clear: both;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1.5rem;
  align-items: start;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}
.image-gallery > li { min-width: 0; }
.article-content .image-gallery img { width: 100%; margin: 0 0 1rem; }
.article-content .image-gallery figure { margin: 0; }
.article-content .image-gallery h3 { margin: .75rem 0; }
.article-content .portrait-gallery img { width: auto; max-width: 100%; height: 14rem; object-fit: contain; margin-inline: auto; }
.article-content .logo-gallery img { width: auto; max-width: min(100%, 14rem); height: 7rem; object-fit: contain; margin-inline: auto; }
.article-content .record-gallery img { width: 100%; height: auto; aspect-ratio: 3 / 1; object-fit: contain; }
.article-content img[role="button"] { cursor: zoom-in; }

/* Native modal semantics, focus containment, and Escape handling come from dialog. */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
html.image-viewer-open { overflow: hidden; }
body.image-viewer-open { position: fixed; inset-inline: 0; top: var(--image-viewer-scroll-top); width: 100%; overflow: hidden; }
.image-viewer {
  width: calc(100% - 2rem);
  max-width: none;
  max-height: calc(100dvh - 2rem);
  padding: 1rem;
  border: 0;
  border-radius: .5rem;
  color: white;
  background: #142529;
  overflow: auto;
}
.image-viewer[open] { display: grid; gap: .75rem; }
.image-viewer::backdrop { background: rgb(0 0 0 / 88%); }
.image-viewer button { min-width: 44px; min-height: 44px; padding: .45rem .65rem; border: 1px solid #839b9f; border-radius: .3rem; background: #263e43; color: white; font: inherit; cursor: pointer; }
.image-viewer button:hover { background: #3b5960; }
.image-viewer-close { justify-self: end; }
.image-viewer figure { margin: 0; min-width: 0; }
.image-viewer img { display: block; width: auto; height: auto; max-width: 100%; max-height: calc(100dvh - 16rem); object-fit: contain; margin-inline: auto; background: var(--white); }
.image-viewer figcaption { max-height: 4rem; overflow: auto; margin-top: .5rem; text-align: center; overflow-wrap: anywhere; }
.image-viewer nav { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .5rem; }
.image-viewer-status { margin: 0; text-align: center; font-size: var(--text-small); }
/* No animation or smooth scrolling, including when reduced motion is requested. */
.article-content :is(table, pre, iframe, video) { max-width: 100%; }
.article-content pre { overflow-x: auto; font-size: .9375rem; tab-size: 4; }
.article-content pre code { font-size: 1em; }
.article-content .table-scroll { clear: both; margin-block: 1.5rem; }
.article-content table { display: table; width: max-content; min-width: 100%; max-width: none; border-collapse: collapse; }
.table-of-contents { margin: 1.5rem auto; max-width: var(--reading-width); border-block: 1px solid var(--line); }
.table-of-contents > summary { min-height: 44px; padding-block: .625rem; font-weight: 500; }
.table-of-contents ul { list-style: none; padding: 0; margin: .5rem 0 1rem; }
.table-of-contents a { display: inline-flex; align-items: center; min-height: 44px; }
.article-content th, .article-content td { border: 1px solid var(--line); padding: .4rem .65rem; text-align: left; }

.cards, .link-grid { display: grid; gap: 1.5rem; }
.cards { --card-columns: 3; grid-template-columns: repeat(var(--card-columns), minmax(0, 1fr)); list-style: none; padding: 0; margin: 1rem 0 0; }
.cards > li { display: flex; min-width: 0; }
.card {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background-color 160ms ease, border-color 160ms ease;
}
.card:is(:hover, :focus-visible) { color: var(--ink); background: var(--soft); }
.card:is(:hover, :focus-visible) :is(h3, h4) { text-decoration: underline; text-underline-offset: .18em; }
.card img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 1; object-fit: contain; background: var(--image-background, var(--soft)); margin: 0; }
.card img.image-portrait { aspect-ratio: 1 / 1; }
.card-text { display: flex; flex-direction: column; flex: 1; min-width: 0; margin: 0; padding: 1.25rem; }
.card-text :is(h3, h4) { color: var(--teal); font-size: 1.125rem; line-height: 1.4; margin: 0 0 .5rem; overflow-wrap: anywhere; }
.card-text p { font-size: var(--text-small); line-height: 1.65; color: var(--muted); margin: 0 0 .5rem; overflow-wrap: anywhere; }
.card-text :is(.card-description, .paper-description) { color: var(--ink); font-size: .9375rem; }
.card-text .card-action { color: var(--teal); font-size: var(--text-small); margin: auto 0 0; padding-top: .5rem; font-weight: 500; }

/* Compact directories and text resources share native, fully linked rows.
   Image-led collections retain the card grid above. */
.listing { margin-top: 2rem; }
.listing .section-heading { margin-bottom: 1rem; }
.listing .section-heading h2 { font-size: 1.25rem; margin: 0; }
.listing .section-heading p { margin: 0; }
.cards.resource-list { --card-columns: 2; }
.cards:is(.directory-list, .bibliography-list, .document-list) { --card-columns: 1; }
.cards:is(.directory-list, .resource-list, .bibliography-list, .document-list) { gap: 0 2rem; }
:is(.directory-list, .resource-list, .bibliography-list, .document-list) .card { border: 0; border-top: 1px solid var(--line); border-radius: 0; padding: 1.25rem 0; overflow: visible; }
:is(.directory-list, .resource-list, .bibliography-list, .document-list) .card-text { padding: 0; }
:is(.directory-list, .resource-list, .bibliography-list, .document-list) .card-action { margin-top: .25rem; }
.directory-list { --directory-image-width: 4.5rem; }
.organisation-directory { --directory-image-width: 7.5rem; }
.directory-list .card { flex-direction: row; align-items: flex-start; gap: 1rem; }
.directory-list .card img { flex: 0 0 var(--directory-image-width); width: var(--directory-image-width); min-width: 0; border-radius: .3rem; }
.directory-list .card.has-image img.image-logo { width: var(--directory-image-width); padding: .25rem; }
.directory-list .card-text { display: grid; grid-template-columns: minmax(12rem, 1fr) minmax(0, 2.5fr); gap: .375rem 1.5rem; align-content: start; }
.directory-list .card-text > :is(h3, p) { grid-column: 1; margin: 0; }
.directory-list .card-text > .card-description { grid-column: 2; grid-row: 1 / 4; }
.directory-list .card:not(.has-description) .card-text { display: flex; }
.directory-list .card-text :is(h3, h4) { font-size: 1rem; }
.directory-list .card-description { font-size: .875rem; }
.bibliography-list .card-text { display: grid; grid-template-columns: 4rem minmax(0, 1fr); gap: .375rem 1.25rem; align-content: start; }
.bibliography-list .card-text > :is(h3, p) { grid-column: 2; margin: 0; }
.bibliography-list .card-text > .card-meta { grid-column: 1; grid-row: 1; color: var(--ink); font-size: 1rem; font-weight: 500; }
.bibliography-list .card-citation { color: var(--muted); font-size: .875rem; }
.bibliography-list :is(.card-citation, .paper-description) { max-width: 90ch; }
.document-list .card-text { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .5rem 1.5rem; }
.document-list .card-text > :is(h3, p) { margin: 0; }
.document-list .card-meta { grid-column: 2; grid-row: 1; align-self: center; max-width: 22rem; text-align: right; }
.document-list :is(.card-description, .card-action) { grid-column: 1 / -1; }
.document-list .card-description, .resource-list .card-description { max-width: var(--reading-width); }
:is(.bibliography-list, .document-list) .card:not(.has-metadata) .card-text { grid-template-columns: minmax(0, 1fr); }
.bibliography-list .card:not(.has-metadata) .card-text > :is(h3, p) { grid-column: 1; }
.section-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem 1rem; }
.section-heading p { color: var(--muted); font-size: var(--text-small); }
.link-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 2rem; list-style: none; padding: 0; }
.link-grid li { min-width: 0; }
.link-grid a { height: 100%; padding: .45rem .5rem; font-weight: 500; }

.small { display: block; color: var(--muted); font-size: var(--text-small); }
.relationships { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem 3rem; border-top: 1px solid var(--line); padding-top: 1.5rem; margin-top: 3rem; }
.relationships > h2 { grid-column: 1 / -1; margin-top: 0; }
.relationship-group { min-width: 0; }
.relationship-group h3 { margin-top: 0; }
.relationship-group .link-grid { grid-template-columns: minmax(0, 1fr); }
.onward { margin: 2rem 0; }
.overview-notes { margin-block: 1rem; }
.overview-notes > summary { cursor: pointer; min-height: 44px; padding-block: .6rem; font-weight: 600; }
.overview-notes[open] > summary { margin-bottom: .5rem; }
:is(.primary-action, .record-actions .primary-resource a, .onward a) { display: inline-flex; align-items: center; min-height: 44px; padding: .625rem 1rem; background: var(--teal); color: var(--white); border-radius: var(--radius); font-weight: 500; text-decoration: none; }
:is(.primary-action, .record-actions .primary-resource a, .onward a):is(:hover, :focus-visible) { background: var(--teal-hover); text-decoration: underline; }
.front-matter-json { background: var(--paper); padding: 1rem; overflow: auto; max-height: 600px; font: 12px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.notice { background: var(--soft); border-left: 3px solid var(--teal); padding: 1rem 1.25rem; border-radius: .3rem; margin: 1.5rem 0; }
.error, .missing-reference { color: var(--danger); }
.error { background: #fff0ee; }
.success { border-color: #38764e; }
.muted { color: var(--muted); }

.alphabet-navigation ul { display: flex; flex-wrap: wrap; gap: .25rem; list-style: none; padding: 0; margin: 1rem 0; }
.alphabet-navigation a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border-radius: var(--radius); }
.alphabet-navigation a:is(:hover, :focus-visible) { background: var(--soft); }
.directory-controls { display: none; }
.directory-enhanced .directory-controls { display: block; }
.directory-controls fieldset { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; min-width: 0; border: 0; padding: 0; margin: 1rem 0; }
.directory-controls .control-field { display: grid; gap: .35rem; min-width: 0; flex: 1 1 12rem; font-size: .9375rem; margin: 0; }
.directory-controls :is(input, select) { width: 100%; min-width: 0; min-height: 44px; }
.event-period { margin-block: 1.5rem; }
.event-period > h3 { margin-bottom: .75rem; }

/* Search uses local text results and native controls; other pages do not load
   the client or download the generated index. */
.search-link { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: .5rem; font-size: .9375rem; }
.search-controls fieldset { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; border: 0; padding: 0; margin: 1rem 0; min-width: 0; }
.search-controls label { display: grid; gap: .35rem; flex: 1 1 18rem; min-width: 0; }
.search-controls label:has(select) { flex: 0 1 13rem; }
.search-controls :is(input, select) { width: 100%; min-width: 0; min-height: 44px; }
.search-results { padding-left: 1.5rem; }
.search-results li { padding-block: 1rem; border-top: 1px solid var(--line); }
.search-results h3 { margin: 0 0 .25rem; }
.search-results p { max-width: var(--reading-width); }
.search-results .result-meta { font-size: var(--text-small); color: var(--muted); margin-bottom: .5rem; }

/* The audit keeps authoring details out of the public record layouts. */
.audit-stats { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); grid-template-rows: auto auto; grid-auto-flow: column; gap: .25rem 1.5rem; margin: 0 0 1.5rem; }
.audit-stats dt { grid-row: 1; font-size: .875rem; color: var(--muted); }
.audit-stats dd { grid-row: 2; font-size: 1.9rem; font-weight: 600; margin: 0; }
.audit-properties { margin-top: .5rem; }
.audit-properties summary { cursor: pointer; min-height: 44px; padding-block: .6rem; }
.audit-properties .front-matter-json { max-width: 32rem; min-width: 0; }
.audit-controls { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; margin: 1rem 0; }
.audit-controls label { display: grid; gap: .35rem; font-size: var(--text-small); }
.audit-controls input, .audit-controls select {
  width: 100%;
  min-width: 15rem;
  padding: .55rem .75rem;
  font: inherit;
  background: var(--white);
  border: 1px solid var(--control-line);
  border-radius: .3rem;
}
.audit-controls > p { font-size: var(--text-small); color: var(--muted); }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.audit-table { border-collapse: collapse; width: 100%; text-align: left; font-size: .82rem; }
.audit-table th { background: var(--soft); font-weight: 600; white-space: nowrap; }
.audit-table th, .audit-table td { padding: .7rem .9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.audit-table tbody tr:hover { background: var(--paper); }
.audit-table code { font-size: .75rem; }

/* Breakpoints change containment and flow, not the content's intrinsic width. */
@media (max-width: 60rem) {
  :root { --gutter: 1.5rem; }
  .cards { --card-columns: 2; }
  .directory-list .card-text { display: flex; }
  .record-header { gap: 1.5rem; }
  .lead-image { flex-basis: 35%; }
  .resource-paths, .home-ecosystem .resource-paths { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-hero { grid-template-columns: minmax(0, 1fr); }
  .hero-copy { max-width: 48rem; }
  .hero-definition { max-width: 64ch; }
  .memory-architecture { max-width: 58rem; margin-inline: auto; }
  .home-topics { gap: 1rem 2rem; }
  .index-intro, article[data-collection="pages"] .record-intro { gap: 2rem; }
  /* Stack before tablet text columns become cramped. */
  .article-content :is(img, figure):is(.image-left, .image-right) {
    float: none;
    width: 100%;
    margin: 1.5rem 0;
  }
}
@media (max-width: 40rem) {
  .header-row { gap: .5rem; }
  .header-row .brand img { width: 7.5rem; }
  .search-controls label:has(select) { flex: 1 1 100%; }
  .footer-groups { grid-template-columns: minmax(0, 1fr); }
  .index-pages[class*="columns-"] { grid-template-columns: minmax(0, 1fr); }
  .home-page .index-pages { grid-template-columns: minmax(0, 1fr); }
  .home-scene, .home-journeys, .activity-columns { grid-template-columns: minmax(0, 1fr); }
  .home-scene .scene-heading h2, .home-pathways > h2 { max-width: 100%; }
  .home-topics { grid-template-columns: minmax(0, 1fr); }
  .home-journeys > li:nth-child(n+4) { grid-column: auto; }
  .home-hero { padding-block: 1.5rem 2.5rem; }
  .member-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .index-intro, article[data-collection="pages"] .record-intro { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .index-intro { padding-block: 1rem 1.5rem; }
  .resource-paths, .resource-paths.learning-path, .home-ecosystem .resource-paths { grid-template-columns: minmax(0, 1fr); }
  .relationships { grid-template-columns: minmax(0, 1fr); }
  :root { --gutter: 1rem; }
  .record-header { display: block; }
  .collection-detail .record-header { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .collection-detail .record-header:not(.has-image) .record-intro:has(.summary, .detail-introduction) { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .collection-detail .record-header:not(.has-image) .record-intro > :is(.summary, .detail-introduction) { grid-column: 1; }
  .collection-detail .record-header .lead-image { grid-column: 1; grid-row: auto; width: min(100%, 24rem); margin-top: 0; }
  .collection-detail .record-header.has-actions .lead-image { grid-row: auto; }
  .collection-detail .metadata dl { grid-template-columns: minmax(0, 1fr); gap: .25rem; }
  .lead-image { width: 100%; max-height: none; max-width: 100%; aspect-ratio: 3 / 1; margin-top: 1rem; }
  .metadata dl, dl.organisation-details, dl.record-properties { grid-template-columns: minmax(0, 1fr); }
  .metadata dl, dl.organisation-details, dl.record-properties { gap: .25rem; }
  .metadata dt:not(:first-child), .organisation-details dt:not(:first-child), .record-properties dt:not(:first-child) { margin-top: .75rem; }
  .cards, .cards.resource-list { --card-columns: 1; }
  .link-grid { grid-template-columns: 1fr; }
  .directory-list .card.has-image { display: grid; grid-template-columns: var(--directory-image-width) minmax(0, 1fr); gap: .25rem 1rem; }
  .directory-list .has-image .card-text, .directory-list .card.has-image:not(.has-description) .card-text { display: contents; }
  .directory-list .has-image img { grid-column: 1; grid-row: 1 / 3; }
  .directory-list .has-image .card-text > :is(h3, .card-meta) { grid-column: 2; }
  .directory-list .has-image .card-text > :is(.card-description, .card-action) { grid-column: 1 / -1; grid-row: auto; }
  .bibliography-list .card-text, .document-list .card-text { grid-template-columns: minmax(0, 1fr); gap: .5rem; }
  .bibliography-list .card-text > :is(h3, p), .document-list .card-meta { grid-column: 1; grid-row: auto; }
  .bibliography-list .card-text > .card-meta { grid-row: auto; }
  .bibliography-list .card-text > .card-meta, .document-list .card-meta { font-size: var(--text-small); font-weight: 400; text-align: left; }
  .audit-stats { grid-template-columns: minmax(0, 1fr) max-content; grid-template-rows: none; grid-auto-flow: row; align-items: baseline; }
  .audit-stats dt, .audit-stats dd { grid-row: auto; }
  .audit-controls label { width: 100%; }
  .audit-controls input, .audit-controls select { min-width: 0; }
}

/* Headers and thumbnails use compact frames. Article artwork uses intrinsic
   proportions so tall diagrams have no forced 3:1 letterbox. */
article[data-collection] .lead-image {
  height: auto;
  max-height: none;
  aspect-ratio: 3 / 1;
  object-fit: contain;
  background: var(--image-background, var(--soft));
}
article[data-collection] :is(img.image-portrait, .portrait-gallery img) {
  aspect-ratio: 1 / 1;
}
article[data-collection] .article-content :is(.portrait-gallery img, .logo-gallery img, img.image-logo) {
  width: min(100%, 14rem);
}
article[data-collection] .article-content img.image-icon {
  width: min(100%, 6rem);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}