/* =========================================================================
   PPExMed — site stylesheet
   Paracelsus Proceedings of Experimental Medicine

   A single, hand-maintained stylesheet for the whole site. No build step,
   no preprocessor — just CSS custom properties and modern layout (grid/
   flex). Visually restores the original PPExMed identity (Webflow-era
   colours, type, spacing, masthead treatment) on top of the new semantic
   architecture. Values below (colours, sizes, spacing) are taken directly
   from the original css/ppexmed.webflow.css, not reinvented. Organised
   top to bottom as:

     1. Design tokens (custom properties)
     2. Reset / base elements
     3. Layout primitives (container, grid)
     4. Header, navigation, footer
     5. Buttons, links, form-ish elements
     6. Homepage sections
     7. Publications / listing pages (archive, issue, volume)
     8. Article page
     9. Figure lightbox (native <dialog>)
    10. Generic content pages
    11. Utilities
    12. Print
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Design tokens
   ------------------------------------------------------------------------- */
:root {
  /* Brand colours -- lifted directly from the original stylesheet's
     :root block (--logo-color, --royal-blue) and the masthead's decorative
     blocks (the "blue square" and "vertical divider"). */
  --ppx-blue: #2200ee;       /* was --logo-color: #20f */
  --ppx-blue-dark: #180aa8;
  --ppx-blue-tint: #eef0fd;
  --ppx-blue-square: #2607d8; /* original .div-block-9 "blue square" */
  --ppx-royal-blue: #546ab4;  /* original --royal-blue, used sparingly */

  /* Neutrals -- original body colour was #333 on white, with #999 for
     footer/divider grey. */
  --ppx-ink: #222;
  --ppx-ink-soft: #333;
  --ppx-ink-muted: #6b6d73;
  --ppx-line: #999;           /* original --grey_footer */
  --ppx-line-strong: #7a7a7a;
  --ppx-paper: #ffffff;
  --ppx-paper-tint: #f7f7f5;
  --ppx-paper-shade: #f0efec;

  /* Semantic aliases */
  --color-text: var(--ppx-ink-soft);
  --color-text-muted: var(--ppx-line);
  --color-link: var(--ppx-blue);
  --color-link-hover: var(--ppx-blue-dark);
  --color-bg: var(--ppx-paper);
  --color-bg-alt: var(--ppx-paper-tint);
  --color-border: var(--ppx-line);

  /* Type -- the original site's body font was literally "Arial, sans-serif"
     at 14px/20px. The serif is kept only for the masthead wordmark. */
  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, "Noto Serif", serif;
  --font-sans: Arial, Helvetica, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --step-0: 1rem;
  --step-1: 1.0625rem;
  --step-2: 1.15rem;
  --step-3: 1.35rem;
  --step-4: 1.6rem;
  --step-5: 1.9rem;

  --leading-tight: 1.25;
  --leading-normal: 1.45;
  --leading-relaxed: 1.55;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.75rem;
  --space-7: 2.25rem;
  --space-8: 3rem;

  /* Layout -- the original .content_wrapper was max-width: 1000px
     (overriding Webflow's default 940px .w-container). */
  --content-max: 62.5rem; /* 1000px */
  --measure-max: 42rem;
  --radius: 0px; /* the original .button also used border-radius: 0 */
  --border: 1px solid var(--color-border);

  --shadow-sm: 0 1px 2px rgba(20, 20, 30, 0.06);
  --shadow-md: 0 2px 10px rgba(20, 20, 30, 0.10);
}

/* -------------------------------------------------------------------------
   2. Reset / base elements
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  color: var(--ppx-ink-soft);
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-3);
  font-weight: 700;
}

h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-4); }
h3 { font-size: var(--step-3); }
h4 { font-size: var(--step-2); }

p { margin: 0 0 var(--space-4); }

a {
  color: var(--color-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--color-link-hover); }
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--ppx-blue);
  outline-offset: 2px;
}

ul, ol { padding-left: 1.25em; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 var(--space-4);
  font-size: 0.92em;
}
th, td {
  border: var(--border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
  vertical-align: top;
}
th { background: var(--color-bg-alt); font-family: var(--font-sans); font-weight: 700; }

hr {
  border: none;
  border-top: var(--border);
  margin: var(--space-6) 0;
}

/* -------------------------------------------------------------------------
   3. Layout primitives
   ------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-7);
}
.section--alt { background: var(--color-bg-alt); }
.section--tight { padding-block: var(--space-6); }

/* Section headings -- italic, bold, with the original's 3px blue
   ".articledivider.blue" rule underneath (a plain grey 2px divider
   elsewhere, see .divider below). */
.section-heading {
  margin-bottom: var(--space-4);
}
.section-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}
.section-heading h2 {
  margin: 0;
  font-size: var(--step-3);
  font-style: italic;
  font-weight: 700;
}
.section-heading .section-link { font-family: var(--font-sans); font-size: 0.85rem; white-space: nowrap; font-style: normal; }
.section-heading .rule {
  background: var(--ppx-blue);
  height: 3px;
  margin-top: var(--space-2);
}
.divider {
  background: var(--color-border);
  height: 2px;
  margin: var(--space-3) 0;
}

/* -------------------------------------------------------------------------
   4. Header, navigation, footer
   ------------------------------------------------------------------------- */
.site-header {
  background: var(--color-bg);
}

.masthead {
  display: flex;
  align-items: center;
  padding-block: var(--space-4);
  gap: 0;
}

/* The original masthead's decorative "blue square and vertical divider",
   reproduced with the same technique (plain CSS colour blocks, no image)
   at the same colours. */
.masthead-square {
  flex: none;
  width: 100px;
  height: 100px;
  background: var(--ppx-blue-square);
  margin-right: var(--space-4);
}
.masthead-bar {
  flex: none;
  width: 5px;
  align-self: stretch;
  background: var(--ppx-blue);
  margin-right: var(--space-4);
}

.masthead-brand-col { flex: 1; min-width: 0; }

.masthead-brand {
  display: block;
  text-decoration: none;
}
.masthead-logo {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
}

.masthead-rule {
  background: var(--color-border);
  height: 2px;
  margin-top: var(--space-2);
}

@media (max-width: 767px) {
  .masthead-square { width: 50px; height: 50px; margin-right: var(--space-3); }
  .masthead-bar { margin-right: var(--space-3); }
  .masthead-logo { max-width: 320px; }
}
@media (max-width: 479px) {
  .masthead-square { width: 28px; height: 28px; }
  .masthead-logo { max-width: 200px; }
}

.site-nav {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  padding: var(--space-3) 0;
  font: inherit;
  font-weight: 700;
  color: var(--ppx-ink-soft);
  cursor: pointer;
}
.nav-toggle-icon {
  width: 18px; height: 13px; position: relative; display: inline-block;
}
.nav-toggle-icon::before, .nav-toggle-icon::after, .nav-toggle-icon span {
  content: ""; position: absolute; left: 0; right: 0; height: 2px; background: currentColor;
}
.nav-toggle-icon::before { top: 0; }
.nav-toggle-icon span { top: 5px; }
.nav-toggle-icon::after { top: 11px; }

.nav-menu {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu > li { position: relative; }

.nav-link {
  display: block;
  padding: var(--space-3) var(--space-3);
  color: var(--ppx-ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  border-bottom: 3px solid transparent;
}
.nav-link:hover,
.nav-menu > li:hover > .nav-link { color: var(--ppx-blue); }
.nav-link[aria-current="page"] { border-bottom-color: var(--ppx-blue); color: var(--ppx-ink-soft); font-weight: 700; }

.nav-menu .has-submenu > .nav-link::after {
  content: "";
  display: inline-block;
  margin-left: 0.4em;
  border: solid currentColor;
  border-width: 0 1px 1px 0;
  padding: 2px;
  transform: rotate(45deg);
  vertical-align: middle;
}

.submenu {
  list-style: none;
  margin: 0;
  padding: var(--space-1) 0;
  position: absolute;
  right: 0;
  top: 100%;
  min-width: 13rem;
  background: #d8d6d6; /* original .dropdown-list background */
  border: var(--border);
  box-shadow: var(--shadow-sm);
  z-index: 40;
  display: none;
}
.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu { display: block; }
.submenu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--ppx-ink-soft);
  text-decoration: none;
  font-size: 0.85rem;
  background: #fff;
  border: 1px solid var(--color-border);
}
.submenu a:hover { background: var(--color-bg-alt); color: var(--ppx-blue); }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav-inner { flex-direction: column; align-items: stretch; }
  .nav-menu {
    flex-direction: column;
    display: none;
    border-top: var(--border);
    padding-block: var(--space-2);
  }
  .site-nav.is-open .nav-menu { display: flex; }
  .nav-link { padding: var(--space-3) var(--space-2); border-bottom: none; }
  .nav-link[aria-current="page"] { background: var(--ppx-blue-tint); border-bottom: none; }
  .nav-menu .has-submenu > .nav-link::after { float: right; margin-top: 0.4em; }
  .submenu {
    display: none;
    position: static;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--color-border);
    margin-left: var(--space-2);
    padding: 0 0 0 var(--space-2);
  }
  .has-submenu.is-open > .submenu { display: block; }
  .has-submenu:hover > .submenu, .has-submenu:focus-within > .submenu { display: none; }
  .has-submenu.is-open > .submenu { display: block; }
}

.site-footer {
  margin-top: var(--space-8);
  padding-block: var(--space-5);
  font-size: 0.9rem;
}
.footer-rule {
  background: var(--color-border);
  height: 2px;
  margin-bottom: var(--space-4);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  align-items: baseline;
  justify-content: space-between;
}
.footer-copyright {
  color: var(--color-border);
  font-size: 0.8rem;
  margin: 0;
}
.footer-copyright a { color: var(--color-border); }

/* -------------------------------------------------------------------------
   5. Buttons / links
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.6em 1em;
  border-radius: var(--radius);
  border: 1px solid var(--ppx-blue);
  background: var(--ppx-blue);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.92rem;
  text-decoration: none;
  line-height: 1.2;
  cursor: pointer;
}
.btn:hover { background: var(--ppx-blue-dark); border-color: var(--ppx-blue-dark); color: #fff; }

.btn--outline {
  background: transparent;
  color: var(--ppx-blue);
}
.btn--outline:hover { background: var(--ppx-blue-tint); color: var(--ppx-blue-dark); }

.btn--quiet {
  background: transparent;
  color: var(--ppx-ink-soft);
  border-color: var(--color-border);
}
.btn--quiet:hover { background: var(--color-bg-alt); color: var(--ppx-blue); border-color: var(--ppx-blue); }

.btn--sm { padding: 0.4em 0.8em; font-size: 0.85rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

.kicker {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ppx-blue);
}

.pill {
  display: inline-block;
  padding: 0.2em 0.65em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.75rem;
  color: var(--ppx-ink-soft);
  background: var(--color-bg);
  text-decoration: none;
}
.pill:hover { border-color: var(--ppx-blue); color: var(--ppx-blue); }

/* -------------------------------------------------------------------------
   6. Homepage sections
   ------------------------------------------------------------------------- */

/* Hero slider -- reproduces the original's 3-photo cross-fade slider
   (same background photographs, same dark overlay treatment) with a
   small vanilla-JS rotator (site.js) instead of Webflow's slider widget. */
.hero-slider {
  position: relative;
  height: 420px;
  overflow: hidden;
  margin-block: var(--space-5);
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-position: 50% 30%;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 0;
  transition: opacity 1s ease;
}
.hero-slide.is-active { opacity: 1; }
.hero-slide-text {
  position: absolute;
  left: var(--space-5);
  right: var(--space-5);
  bottom: var(--space-5);
  max-width: 40rem;
  background: rgba(37, 37, 37, 0.77);
  color: #fff;
  padding: var(--space-4) var(--space-5);
}
.hero-slide-text h2 {
  color: #fff;
  font-size: 1.1rem;
  font-style: italic;
  font-weight: 700;
  margin: 0 0 var(--space-2);
}
.hero-slide-text p {
  color: #fff;
  font-style: italic;
  font-size: 0.85rem;
  margin: 0;
}
@media (max-width: 767px) {
  .hero-slider { height: 220px; }
  .hero-slide-text { display: none; }
}

.article-list {
  display: grid;
  gap: 0;
}
.article-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: 2px solid var(--color-border);
  align-items: start;
}
.article-card:first-child { padding-top: 0; }
.article-card-type {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ppx-blue);
  margin-bottom: var(--space-1);
}
.article-card h3 {
  font-size: var(--step-2);
  font-weight: 700;
  text-align: justify;
  margin: 0 0 var(--space-1);
}
.article-card h3 a { color: var(--ppx-ink-soft); text-decoration: none; }
.article-card h3 a:hover { color: var(--ppx-blue); }
.article-card .authors {
  font-family: var(--font-sans);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--ppx-ink-soft);
  margin: 0 0 var(--space-1);
}
.article-card .cite-line {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}
.article-card .btn-row { margin-top: var(--space-2); justify-content: flex-end; }

@media (max-width: 640px) {
  .article-card { grid-template-columns: minmax(0, 1fr); }
  .article-card .btn-row { justify-content: flex-start; }
}

.callout-grid {
  display: grid;
  grid-template-columns: minmax(0, 25%) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}
@media (max-width: 767px) { .callout-grid { grid-template-columns: minmax(0, 1fr); } }

.special-topic { padding-block: var(--space-3); }
.special-topic .kicker { display: block; margin-bottom: var(--space-1); }
.special-topic-kicker { font-size: 1.1rem; font-style: italic; margin-bottom: var(--space-1); }
.special-topic-title { text-align: justify; font-size: var(--step-2); }
.special-topic-editors { font-style: normal; color: var(--ppx-ink-soft); font-size: 0.9rem; }

.bib-details dl {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: var(--space-2) var(--space-4);
  margin: 0 0 var(--space-4);
  font-size: 0.9rem;
}
.bib-details dt { color: var(--ppx-ink-soft); font-family: var(--font-sans); }
.bib-details dd { margin: 0; }
.badge-row { display: flex; flex-wrap: wrap; gap: var(--space-6); margin-top: var(--space-4); align-items: center; }
.badge-row a { display: block; text-decoration: none; }
.badge-row .dora-badge { display: flex; align-items: center; gap: var(--space-3); }
.badge-row .dora-badge span { font-weight: 700; color: var(--ppx-ink); font-size: 0.85rem; max-width: 10rem; }
.badge-row img.dora-img { width: 200px; height: auto; }
.badge-row img.clockss-img { width: 100px; height: auto; }

/* -------------------------------------------------------------------------
   7. Publications / listing pages
   ------------------------------------------------------------------------- */
.page-title-block {
  padding-block: var(--space-5);
}
.page-title-block h1 { margin-bottom: var(--space-1); }
.page-title-block .lede { color: var(--ppx-ink-soft); font-family: var(--font-sans); font-size: 0.9rem; max-width: var(--measure-max); }

.listing-group + .listing-group { margin-top: var(--space-7); }
.listing-group h2 { font-size: var(--step-2); font-style: italic; border-bottom: none; padding-bottom: var(--space-2); }

.issue-card {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: var(--space-4);
  border: var(--border);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  align-items: center;
}
.issue-card img { border-radius: var(--radius); }
@media (max-width: 640px) { .issue-card { grid-template-columns: minmax(0, 1fr); } }

/* -------------------------------------------------------------------------
   8. Article page
   ------------------------------------------------------------------------- */
.article-header {
  padding-block: var(--space-5);
  text-align: center;
}
.article-meta-line {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ppx-ink-soft);
  margin-bottom: var(--space-3);
}
.article-header h1 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  max-width: 46rem;
  margin-inline: auto;
}
.article-authors {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  margin-bottom: var(--space-2);
}
.article-affiliations {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ppx-ink-soft);
  margin-bottom: var(--space-3);
  max-width: 46rem;
  margin-inline: auto;
}
.article-downloads { margin-top: var(--space-3); justify-content: center; }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(160px, 200px);
  gap: var(--space-6);
  align-items: start;
  padding-block: var(--space-5);
}
@media (max-width: 900px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); }
}

.article-body { max-width: var(--measure-max); font-size: 0.93rem; overflow-wrap: break-word; }
.article-body h2 {
  font-size: var(--step-3);
  font-style: italic;
  margin-top: var(--space-6);
  padding-top: var(--space-2);
  border-top: var(--border);
}
.article-body section:first-of-type h2 { margin-top: 0; padding-top: 0; border-top: none; }
.article-body p { line-height: var(--leading-relaxed); text-align: justify; hyphens: auto; }
.article-body p.equation {
  text-align: center;
  overflow-x: auto;
  margin: var(--space-4) 0;
}
.article-body em.article_subsection,
.article-body em.subsection {
  display: block;
  font-style: italic;
  font-weight: 700;
  color: var(--ppx-ink);
  margin-top: var(--space-4);
}

.keyword-list { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0 0 var(--space-5); padding: 0; list-style: none; }

.article-figure {
  margin: var(--space-5) 0;
  border: var(--border);
  padding: var(--space-3);
  background: var(--color-bg-alt);
}
.article-figure img { cursor: zoom-in; margin-inline: auto; }
.article-figure figcaption {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ppx-ink-soft);
  margin-top: var(--space-2);
  text-align: left;
}
.figure-zoom-btn {
  background: none; border: none; padding: 0; margin: 0; cursor: zoom-in; display: block; width: 100%;
}

.reference-list { list-style: none; margin: 0; padding: 0; counter-reset: ref; }
.reference-list li {
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px dotted var(--color-border);
  font-size: 0.85rem;
}
.reference-list li:last-child { border-bottom: none; }
.reference-number { color: var(--ppx-ink-soft); font-family: var(--font-sans); }
.reference-text { overflow-wrap: break-word; }
.reference-text a { display: block; margin-top: 2px; font-size: 0.9em; word-break: break-word; }

.article-side-nav {
  position: sticky;
  top: var(--space-4);
  font-family: var(--font-sans);
  font-size: 0.8rem;
}
.article-side-nav h2 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  border: none;
  margin-bottom: var(--space-2);
}
.article-side-nav ul { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--color-border); }
.article-side-nav a {
  display: block;
  padding: var(--space-1) var(--space-3);
  color: var(--ppx-ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
}
.article-side-nav a:hover { color: var(--ppx-blue); }
.article-side-nav a.is-active { color: var(--ppx-blue); border-left-color: var(--ppx-blue); font-weight: 700; }

.mobile-jump {
  display: none;
  margin-bottom: var(--space-4);
  border: var(--border);
}
.mobile-jump summary {
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  list-style: none;
}
.mobile-jump summary::-webkit-details-marker { display: none; }
.mobile-jump ul { list-style: none; margin: 0; padding: var(--space-2) var(--space-3) var(--space-3); }
.mobile-jump a { display: block; padding: var(--space-1) 0; text-decoration: none; color: var(--ppx-ink-soft); font-size: 0.85rem; }
@media (max-width: 900px) {
  .article-side-nav { display: none; }
  .mobile-jump { display: block; }
}

.article-notice {
  border: var(--border);
  border-left: 3px solid var(--ppx-blue);
  background: var(--color-bg-alt);
  padding: var(--space-4);
  margin-block: var(--space-5);
  font-size: 0.85rem;
  text-align: left;
}

/* -------------------------------------------------------------------------
   9. Figure lightbox (native <dialog>)
   ------------------------------------------------------------------------- */
.lightbox { border: none; padding: 0; background: transparent; max-width: 92vw; max-height: 92vh; }
.lightbox::backdrop { background: rgba(10, 10, 15, 0.86); }
.lightbox-inner { background: var(--color-bg); padding: var(--space-3); max-width: 92vw; max-height: 92vh; overflow: auto; }
.lightbox-inner img { max-height: 80vh; margin-inline: auto; }
.lightbox-caption { font-family: var(--font-sans); font-size: 0.82rem; color: var(--ppx-ink-soft); margin-top: var(--space-3); padding: 0 var(--space-2); }
.lightbox-close {
  position: sticky; top: 0; float: right;
  background: var(--ppx-ink); color: #fff; border: none;
  width: 2rem; height: 2rem; font-size: 1.1rem; line-height: 1;
  cursor: pointer; margin-left: var(--space-3);
}

/* -------------------------------------------------------------------------
   10. Generic content pages
   ------------------------------------------------------------------------- */
.prose { max-width: var(--measure-max); font-size: 0.93rem; }
.prose h2 { margin-top: var(--space-5); font-size: var(--step-3); font-style: italic; }
.prose h3 { font-size: var(--step-2); }
.prose p { line-height: var(--leading-relaxed); text-align: justify; }

.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-4) var(--space-5);
}
.board-member h4 { font-size: 0.92rem; font-weight: 700; margin-bottom: var(--space-1); }
.board-member .role { font-family: var(--font-sans); font-size: 0.72rem; color: var(--ppx-blue); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--space-1); }
.board-member .affiliation { font-family: var(--font-sans); font-size: 0.8rem; color: var(--ppx-ink-soft); }

.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: var(--space-5); }
.contact-grid h3 { font-size: 0.95rem; }

.utility-page { padding-block: var(--space-7); text-align: center; }
.utility-page h1 { font-size: var(--step-4); }

/* -------------------------------------------------------------------------
   11. Utilities
   ------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -3rem;
  background: var(--ppx-ink); color: #fff; padding: var(--space-2) var(--space-4);
  z-index: 100; transition: top 0.15s ease;
}
.skip-link:focus { top: var(--space-4); }

/* -------------------------------------------------------------------------
   12. Print
   ------------------------------------------------------------------------- */
@media print {
  .site-header, .site-nav, .site-footer, .article-side-nav, .mobile-jump,
  .article-downloads, .hero-slider { display: none !important; }
  .article-body { max-width: none; }
  a { color: var(--ppx-ink); text-decoration: none; }
}