/* ==========================================================================
   AIST – site-wide styles
   Design tokens, base typography, header/footer, shared components.
   Page-specific rules live in the sibling files (home.css, projects.css, ...).
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tokens
   -------------------------------------------------------------------------- */
:root {
  /* brand */
  --navy-950: #081827;
  --navy-900: #0c2238;
  --navy-800: #11304f;
  --navy-700: #163f68;
  --color-primary: #1e4e79;
  --color-primary-600: #24619a;
  --color-primary-500: #2f74b5;
  --color-primary-light: #6ec1e4;
  --sky-100: #e7f4fb;
  --sky-200: #cfe8f6;

  /* research areas */
  --area-ehealth: #15957f;
  --area-ehealth-soft: #e3f5f1;
  --area-ml: #5a63d8;
  --area-ml-soft: #e9eafb;
  --area-cv: #e0821c;
  --area-cv-soft: #fdf0e0;

  /* neutrals */
  --color-heading: #111c27;
  --color-text: #3a4653;
  --color-text-light: #6b7683;
  --color-line: #e4e9ef;
  --color-line-strong: #cfd7e0;
  --color-white: #fff;
  --color-black: #000;
  --color-bg: #fff;
  --color-bg-light: #f5f7fa;
  --color-bg-muted: #edf1f5;

  /* kept for backwards compatibility with older page styles */
  --color-secondary: #54595f;
  --color-accent: var(--color-primary-light);
  --color-dark: var(--navy-900);
  --color-green: var(--area-ehealth);

  /* type */
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Manrope", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  --font-size-base: 17px;
  --font-size-nav: 0.95rem;
  --font-size-subnav: 0.9rem;
  --font-weight-body: 400;
  --font-weight-heading: 700;
  --font-weight-bold: 600;

  /* layout */
  --max-width: 1200px;
  --content-width: 780px;
  --gutter: 1.5rem;
  --header-height: 76px;
  --spacing-unit: 1.5rem;
  --section-gap: 5rem;

  /* shape + depth */
  --border-radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(17, 28, 39, 0.06), 0 1px 3px rgba(17, 28, 39, 0.05);
  --shadow-md: 0 6px 18px rgba(17, 28, 39, 0.08), 0 2px 6px rgba(17, 28, 39, 0.05);
  --shadow-lg: 0 20px 50px rgba(12, 34, 56, 0.16), 0 6px 16px rgba(12, 34, 56, 0.08);
  --ring: 0 0 0 3px rgba(110, 193, 228, 0.45);

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

/* The hidden attribute must win over any display rule of the element
   (the "show more" bars are display: flex and toggled via hidden). */
[hidden] {
  display: none !important;
}

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  /* Root canvas colour: shows in the sub-pixel row browsers add below a
     footer of fractional height, and in the overscroll areas. Header and
     footer are navy, so navy keeps both page ends seamless; the body
     keeps its own white background for the content. */
  background-color: var(--navy-950);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: var(--font-weight-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  text-underline-offset: 0.15em;
  transition: color 0.2s var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--color-primary-600);
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  color: var(--color-heading);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(2rem, 1.4rem + 2vw, 2.9rem);
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 1.95rem);
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.05rem;
}

h5,
h6 {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 1.1em;
}

strong,
b {
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 2.5rem 0;
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  border-left: 3px solid var(--color-primary-light);
  background: var(--color-bg-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

pre {
  overflow-x: auto;
  padding: 1rem 1.25rem;
  background: var(--color-bg-light);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
}

::selection {
  background: var(--sky-200);
  color: var(--color-heading);
}

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container-narrow {
  max-width: calc(var(--content-width) + 2 * var(--gutter));
}

.section {
  padding: var(--section-gap) 0;
}

.section-tint {
  background: var(--color-bg-light);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0;
}

.section-head p {
  margin: 0.35rem 0 0;
  color: var(--color-text-light);
  max-width: 60ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-500);
}

.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.text-center {
  text-align: center;
}

.mt-3 {
  margin-top: 1.5rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

main {
  min-height: 60vh;
}

/* --------------------------------------------------------------------------
   Buttons, badges, links
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-white);
  background: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-light {
  background: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-primary);
}

.btn-light:hover,
.btn-light:focus-visible {
  background: var(--sky-100);
  border-color: var(--sky-100);
  color: var(--color-primary);
}

.btn-ghost-light {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--color-white);
}

.btn-ghost-light:hover,
.btn-ghost-light:focus-visible {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--color-white);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: var(--font-weight-bold);
  font-size: 0.95rem;
  white-space: nowrap;
}

.link-arrow i {
  font-size: 0.8em;
  transition: transform 0.2s var(--ease);
}

.link-arrow:hover {
  text-decoration: none;
}

.link-arrow:hover i {
  transform: translateX(3px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  background: var(--color-bg-muted);
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.01em;
  line-height: 1.6;
  white-space: nowrap;
}

.badge-ehealth {
  background: var(--area-ehealth-soft);
  color: var(--area-ehealth);
}

.badge-ml {
  background: var(--area-ml-soft);
  color: var(--area-ml);
}

.badge-cv {
  background: var(--area-cv-soft);
  color: var(--area-cv);
}

.badge-live {
  background: #e4f6ea;
  color: #1c7c43;
}

.badge-live::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: currentColor;
}

/* --------------------------------------------------------------------------
   Site header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 300;
  background: linear-gradient(180deg, var(--navy-900), var(--navy-800));
  color: var(--color-white);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
  transition: box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
  box-shadow: 0 8px 24px rgba(8, 24, 39, 0.28);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--color-white);
  text-decoration: none;
  flex: none;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-white);
  text-decoration: none;
}

/* The SVG has some built-in padding, so it is drawn a little taller than the
   header bar and pulled back with negative margins to sit visually centered. */
.brand-logo {
  display: block;
  height: 68px;
  width: auto;
  margin: -8px 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  padding-left: 0.85rem;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.brand-text span:first-child {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.brand-text span:last-child {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.65);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav > a,
.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.86);
  font-size: var(--font-size-nav);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav > a:hover,
.nav-dropdown-toggle:hover,
.nav-dropdown:focus-within .nav-dropdown-toggle {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  text-decoration: none;
}

.site-nav > a.active,
.nav-dropdown-toggle.active {
  color: var(--color-white);
  box-shadow: inset 0 -2px 0 var(--color-primary-light);
  border-radius: var(--radius-pill) var(--radius-pill) 4px 4px;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle::after {
  content: "";
  width: 0.4em;
  height: 0.4em;
  margin-left: 0.1rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  opacity: 0.7;
}

/* invisible bridge so the pointer can travel from the toggle into the menu */
.nav-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.75rem;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  left: 0;
  min-width: 200px;
  padding: 0.4rem;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.16s var(--ease), transform 0.16s var(--ease),
    visibility 0.16s;
  z-index: 320;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--font-size-subnav);
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 0.15s var(--ease), color 0.15s var(--ease);
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a:focus-visible {
  background: var(--color-bg-light);
  color: var(--color-primary);
  text-decoration: none;
}

.nav-dropdown-menu a[target="_blank"]::after {
  content: "\f08e";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.7em;
  color: var(--color-text-light);
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s var(--ease);
}

.search-toggle:hover {
  background: rgba(255, 255, 255, 0.18);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.78rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.05em;
}

.language-switcher a,
.language-switcher strong {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.1rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-pill);
  line-height: 1.2;
  text-decoration: none;
}

.language-switcher a {
  color: rgba(255, 255, 255, 0.7);
}

.language-switcher a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.language-switcher strong {
  background: var(--color-white);
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border: none;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  cursor: pointer;
}

.nav-toggle .bars {
  position: relative;
  display: block;
  width: 1.2rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background-color 0.2s;
}

.nav-toggle .bars::before,
.nav-toggle .bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s var(--ease), top 0.25s var(--ease);
}

.nav-toggle .bars::before {
  top: -6px;
}

.nav-toggle .bars::after {
  top: 6px;
}

.site-header.nav-open .nav-toggle .bars {
  background: transparent;
}

.site-header.nav-open .nav-toggle .bars::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header.nav-open .nav-toggle .bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Page header band
   -------------------------------------------------------------------------- */
.page-header {
  position: relative;
  padding: 3.5rem 0 3rem;
  margin-bottom: 3rem;
  background:
    radial-gradient(60rem 20rem at 85% -20%, rgba(110, 193, 228, 0.22), transparent 60%),
    linear-gradient(180deg, var(--color-bg-light), var(--color-bg));
  border-bottom: 1px solid var(--color-line);
}

.page-header h1 {
  margin-bottom: 0;
}

.page-header .lead {
  max-width: 68ch;
  margin: 1rem 0 0;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--color-text);
}

.page-header .page-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

/* --------------------------------------------------------------------------
   Articles (posts, project pages)
   -------------------------------------------------------------------------- */
article {
  max-width: var(--max-width);
  margin: 0 auto;
}

.article-header {
  margin-bottom: 2rem;
}

.article-header h1 {
  margin-bottom: 0.75rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.article-meta i {
  color: var(--color-primary-light);
  margin-right: 0.35rem;
}

.article-hero-image {
  margin-top: 1.75rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.article-hero-image img {
  display: block;
  width: 100%;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body > :first-child {
  margin-top: 0;
}

.article-body h2 {
  margin-top: 2.25rem;
}

.article-body h3 {
  margin-top: 1.75rem;
}

.article-body img {
  border-radius: var(--border-radius);
}

.article-body ul,
.article-body ol {
  padding-left: 1.4rem;
}

.article-body li {
  margin-bottom: 0.35rem;
}

.article-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-line);
}

/* --------------------------------------------------------------------------
   Listings (news grid, collapsible entries for publications & theses)
   -------------------------------------------------------------------------- */
.listing-items {
  margin-top: 0;
}

.listing-item {
  display: block;
  color: inherit;
  text-decoration: none;
}

.listing-item h2 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.listing-item .date {
  color: var(--color-text-light);
  font-size: 0.85rem;
}

/* Year sections (publications, theses): every year shows two entries and a
   right-aligned "show N more" button
   (initYearSections in main.js). Without JS every entry is shown and the
   button stays hidden. */
.year-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0 1.25rem;
  font-size: 1.6rem;
  color: var(--color-heading);
}

.year-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-line);
}

.year-section:first-child .year-heading {
  margin-top: 0;
}

.listing-item.is-beyond {
  display: none;
}

.year-more-bar {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.25rem;
}

.year-more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-pill);
  background: var(--color-white);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
}

.year-more:hover,
.year-more:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
}

.year-more:focus-visible {
  box-shadow: 0 0 0 3px rgba(30, 78, 121, 0.25);
}

.year-more i {
  font-size: 0.7rem;
}

.year-more[aria-expanded="true"] i {
  transform: rotate(180deg);
}

html:not(.js) .year-more-bar {
  display: none;
}

.publication-entry,
.thesis-entry {
  margin-bottom: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.publication-entry:hover,
.thesis-entry:hover {
  border-color: var(--color-line-strong);
  box-shadow: var(--shadow-sm);
}

.listing-item.collapsible.open {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.listing-item.collapsible .listing-title {
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
  line-height: 1.4;
}

.listing-toggle {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  margin: 0;
  padding: 0.25rem 0;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.listing-toggle:hover {
  color: var(--color-primary);
}

.listing-toggle:focus-visible {
  outline: none;
  color: var(--color-primary);
  box-shadow: var(--ring);
  border-radius: var(--radius-sm);
}

.listing-toggle-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  margin-top: 0.05rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-line);
  border-radius: 50%;
  font-size: 0.65rem;
  color: var(--color-primary);
}

.listing-toggle:hover .listing-toggle-icon,
.listing-toggle:focus-visible .listing-toggle-icon {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.listing-item.collapsible.open .listing-toggle-icon {
  transform: rotate(180deg);
}

.listing-content {
  padding-top: 0.75rem;
  margin-top: 0.75rem;
  border-top: 1px dashed var(--color-line);
}

.js .listing-item.collapsible .listing-content.closed {
  display: none;
}

/* Without JS nothing collapses, so the control must not advertise itself as
   one: every entry is simply shown in full.
   Scoped to `html` on purpose -- a bare `:not(.js)` matches <body>, <main> and
   every wrapper <div> too. */
html:not(.js) .listing-item.collapsible .listing-content {
  display: block;
}

html:not(.js) .listing-toggle {
  cursor: default;
}

html:not(.js) .listing-toggle:hover {
  color: inherit;
}

html:not(.js) .listing-toggle-icon {
  display: none;
}

@media (prefers-reduced-motion: no-preference) {
  .year-more {
    transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
      color 0.2s var(--ease);
  }

  .year-more i {
    transition: transform 0.25s var(--ease);
  }

  .listing-toggle {
    transition: color 0.15s var(--ease);
  }

  .listing-toggle-icon {
    transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease),
      color 0.15s var(--ease), transform 0.25s var(--ease);
  }
}

/* Highlight an entry arrived at via an anchor link. */
.listing-item:has(.listing-title:target) {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 78, 121, 0.12);
}

.publication-meta,
.thesis-meta {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.publication-links {
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.publication-links strong {
  color: var(--color-text-light);
  font-weight: 500;
}

.publication-links a,
.doi-link {
  color: var(--color-primary);
  word-break: break-all;
}

.publication-abstract {
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

.publication-abstract > :last-child {
  margin-bottom: 0;
}

.listing-content > p:last-child {
  margin-bottom: 0;
}

/* Category badges sit outside .listing-content so they stay readable while the
   entry is collapsed. Each one is a button that jumps the filter to it. */
.publication-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.35rem 0 0;
}

.publication-category {
  padding: 0.12rem 0.6rem;
  background: var(--color-bg-light);
  color: var(--color-text-light);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  line-height: 1.6;
  white-space: nowrap;
  cursor: pointer;
}

.publication-category:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.publication-category:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--ring);
}

@media (prefers-reduced-motion: no-preference) {
  .publication-category {
    transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease),
      color 0.15s var(--ease);
  }
}

/* ---------- Category filter (publications) ------------------------------- */
.cat-filter {
  position: sticky;
  top: calc(var(--header-height) + 0.75rem);
  z-index: 150;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 2rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.cat-filter-label {
  font-size: 0.85rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
}

.cat-filter-control {
  position: relative;
}

.cat-filter-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-width: 19rem;
  max-width: 100%;
  padding: 0.5rem 0.9rem;
  background: var(--color-white);
  color: var(--color-heading);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
}

.cat-filter-trigger:hover {
  border-color: var(--color-primary-light);
}

.cat-filter-trigger:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--ring);
}

.cat-filter-control.is-open .cat-filter-trigger {
  border-color: var(--color-primary);
}

.cat-filter-control--compact .cat-filter-trigger {
  min-width: 10rem;
}

.cat-filter-label + .cat-filter-control + .cat-filter-label {
  margin-left: 0.75rem;
}

.cat-filter-value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cat-filter-chevron {
  flex: none;
  font-size: 0.7em;
  color: var(--color-primary);
}

.cat-filter-control.is-open .cat-filter-chevron {
  transform: rotate(180deg);
}

.cat-filter-menu {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  z-index: 160;
  min-width: 100%;
  max-height: min(60vh, 26rem);
  overflow-y: auto;
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-0.4rem);
}

.cat-filter-control.is-open .cat-filter-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.cat-filter-menu:focus {
  outline: none;
}

.cat-filter-menu [role="option"] {
  display: grid;
  grid-template-columns: 1.1rem 1fr auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-text);
  white-space: nowrap;
  cursor: pointer;
}

.cat-filter-menu [role="option"] .fa-check {
  visibility: hidden;
  font-size: 0.75em;
  color: var(--color-primary);
}

.cat-filter-menu [role="option"][aria-selected="true"] .fa-check {
  visibility: visible;
}

.cat-filter-menu [role="option"]:hover,
.cat-filter-menu [role="option"].is-active {
  background: var(--color-bg-light);
  color: var(--color-heading);
}

.cat-filter-menu [role="option"][aria-selected="true"] {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.cat-filter-count {
  padding: 0.1rem 0.5rem;
  background: var(--color-bg-muted);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: var(--font-weight-body);
  font-variant-numeric: tabular-nums;
  color: var(--color-text-light);
}

.cat-filter-menu [role="option"]:hover .cat-filter-count,
.cat-filter-menu [role="option"].is-active .cat-filter-count,
.cat-filter-menu [role="option"][aria-selected="true"] .cat-filter-count {
  background: var(--color-primary);
  color: var(--color-white);
}

.cat-filter-results {
  margin: 0 0 0 auto;
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-variant-numeric: tabular-nums;
}

@media (prefers-reduced-motion: no-preference) {
  .cat-filter-trigger {
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }

  .cat-filter-chevron {
    transition: transform 0.2s var(--ease);
  }

  .cat-filter-menu {
    transition: opacity 0.16s var(--ease), transform 0.16s var(--ease), visibility 0.16s;
  }

  .cat-filter-menu [role="option"] {
    transition: background-color 0.12s var(--ease), color 0.12s var(--ease);
  }
}

/* --------------------------------------------------------------------------
   News grid
   -------------------------------------------------------------------------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.news-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.news-card:hover,
.news-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  text-decoration: none;
  color: inherit;
}

.news-card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-muted);
  overflow: hidden;
}

.news-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease);
}

.news-card:hover .news-card-media img {
  transform: scale(1.04);
}

.news-card-media.is-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy-800), var(--color-primary-500));
}

.news-card-media.is-placeholder img {
  width: 40%;
  height: auto;
  opacity: 0.85;
}

.news-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.5rem;
  padding: 1.25rem 1.35rem 1.4rem;
}

.news-card .date {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-light);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.news-card h2,
.news-card h3 {
  font-size: 1.15rem;
  line-height: 1.35;
  margin: 0;
  color: var(--color-heading);
  transition: color 0.2s var(--ease);
}

.news-card:hover h2,
.news-card:hover h3 {
  color: var(--color-primary);
}

.news-card p.excerpt {
  margin: 0;
  color: var(--color-text);
  font-size: 0.92rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card .link-arrow {
  margin-top: auto;
  padding-top: 0.5rem;
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  margin-top: 3rem;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
}

.pagination a {
  color: var(--color-primary);
  border: 1px solid var(--color-line-strong);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.pagination a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

.pagination .current {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
}

/* --------------------------------------------------------------------------
   Project cards (listing)
   -------------------------------------------------------------------------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 260px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-muted);
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.project-card:hover,
.project-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-card .card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82) 0%, rgba(255, 255, 255, 0.96) 70%);
  z-index: 1;
}

.project-card .card-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.5rem 1.5rem 1.35rem;
}

.project-card .card-logo {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 84px;
  margin-bottom: 1rem;
}

.project-card .card-logo img {
  max-height: 84px;
  max-width: 220px;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.3s var(--ease);
}

.project-card:hover .card-logo img {
  transform: scale(1.04);
}

.project-card h3 {
  font-size: 1.1rem;
  line-height: 1.35;
  margin: 0 0 0.5rem;
}

.project-card h3 a {
  color: var(--color-heading);
}

.project-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
}

.project-card h3 a:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.project-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin-top: auto;
  padding-top: 0.75rem;
  color: var(--color-text-light);
  font-size: 0.82rem;
}

.project-card .card-meta i {
  margin-right: 0.3rem;
  color: var(--color-primary-light);
}

.project-card .card-badges {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  display: flex;
  gap: 0.35rem;
}

/* completed projects: compact logo tiles */
.project-grid.complete {
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.project-card.inactive {
  min-height: 0;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  box-shadow: none;
}

.project-card.inactive a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  height: 100%;
  padding: 1.1rem 1rem;
  color: var(--color-text);
  text-decoration: none;
}

.project-card.inactive img {
  height: 56px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: filter 0.3s var(--ease), opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.project-card.inactive:hover img {
  filter: none;
  opacity: 1;
  transform: scale(1.05);
}

.project-card.inactive .card-title {
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.3;
  text-align: center;
  color: var(--color-text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card.inactive:hover .card-title {
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Gallery + lightbox (used inside news posts)
   -------------------------------------------------------------------------- */
.gallery {
  margin: 1.5rem 0;
}

.gallery img {
  display: block;
  width: 100%;
  margin-bottom: 1rem;
  border-radius: var(--border-radius);
}

.js .gallery {
  position: relative;
  margin: 1.5rem 0 2.5rem;
  max-height: 80vh;
  border-radius: var(--border-radius);
  background: var(--color-bg-light);
}

.js .gallery p {
  margin: 0;
}

.js .gallery img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  margin-bottom: 0;
  cursor: zoom-in;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.js .gallery img.active {
  opacity: 1;
}

.gallery-nav {
  display: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-primary);
  font-size: 18px;
  cursor: pointer;
  z-index: 10;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.gallery-nav:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-50%) scale(1.06);
}

.js .gallery-nav {
  display: flex;
}

.gallery-nav-prev {
  left: 0.75rem;
}

.gallery-nav-next {
  right: 0.75rem;
}

.gallery-counter {
  display: none;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.js .gallery-counter {
  display: block;
  position: absolute;
  bottom: -1.75rem;
  left: 0;
  right: 0;
}

.gallery-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(8, 24, 39, 0.94);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.gallery-lightbox.active {
  display: flex;
}

.gallery-lightbox img {
  max-width: 92%;
  max-height: 90%;
  object-fit: contain;
  border-radius: var(--border-radius);
  cursor: default;
}

.gallery-lightbox-close {
  position: absolute;
  top: 16px;
  right: 24px;
  color: #fff;
  font-size: 40px;
  line-height: 1;
  cursor: pointer;
  z-index: 1001;
}

.gallery-lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 36px;
  padding: 20px;
  cursor: pointer;
  z-index: 1001;
  user-select: none;
}

.gallery-lightbox-nav:hover {
  color: var(--color-primary-light);
}

.gallery-lightbox-prev {
  left: 16px;
}

.gallery-lightbox-next {
  right: 16px;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: var(--section-gap);
  background: linear-gradient(180deg, var(--navy-900), var(--navy-950));
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.92rem;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary-500) 60%, transparent);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
  color: var(--color-white);
}

.site-footer h3 {
  margin: 0 0 0.9rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer p {
  margin: 0 0 0.6rem;
  line-height: 1.6;
}

.site-footer strong {
  color: var(--color-white);
  font-weight: 500;
}

.footer-columns {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem 2.5rem;
  padding: 3.5rem 0 3rem;
}

.footer-brand-logo {
  display: block;
  width: 200px;
  height: auto;
  margin: -0.75rem 0 0.5rem -0.5rem;
}

.footer-brand-title {
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

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

.footer-list li {
  margin-bottom: 0.45rem;
}

.footer-list a {
  text-decoration: none;
}

.footer-list a:hover {
  text-decoration: underline;
}

.footer-contact p {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}

.footer-contact i {
  flex: none;
  width: 1.1rem;
  margin-top: 0.3rem;
  text-align: center;
  color: var(--color-primary-light);
}

.footer-fh-logo {
  width: 170px;
  height: auto;
  margin-bottom: 0.75rem;
}

.footer-search-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  max-width: 260px;
  margin-top: 0.75rem;
  padding: 0.55rem 0.9rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.85);
  font-family: inherit;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-search-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
}

.footer-search-btn kbd {
  margin-left: auto;
  padding: 0.05rem 0.4rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.6);
}

.social-icons {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
}

.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  transition: background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.social-icons a:hover {
  background: var(--color-primary-500);
  transform: translateY(-2px);
}

.social-icons img {
  width: 18px;
  height: 18px;
  filter: brightness(0) invert(1);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

/* --------------------------------------------------------------------------
   Pagefind theming
   -------------------------------------------------------------------------- */
:root {
  --pf-font: var(--font-body);
  --pf-text: var(--color-heading);
  --pf-text-secondary: var(--color-text);
  --pf-text-muted: var(--color-text-light);
  --pf-background: var(--color-white);
  --pf-border: var(--color-line);
  --pf-border-focus: var(--color-primary);
  --pf-hover: var(--color-bg-light);
  --pf-mark: var(--color-primary);
  --pf-shadow-sm: var(--shadow-sm);
  --pf-shadow-md: var(--shadow-md);
  --pf-shadow-lg: var(--shadow-lg);
  --pf-outline-focus: var(--color-primary-light);
  --pf-border-radius: var(--border-radius);
  --pf-modal-backdrop: rgba(8, 24, 39, 0.55);
  --pf-modal-max-width: 640px;
}

/* --------------------------------------------------------------------------
   Motion
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --section-gap: 4rem;
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  :root {
    --header-height: 64px;
  }

  .brand-text {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    padding: 0.75rem var(--gutter) 1.25rem;
    background: var(--navy-800);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(8, 24, 39, 0.4);
    opacity: 0;
    visibility: hidden;
    /* Closed, the panel is transparent but still in the layout; without this
       a tap on the empty-looking area below the header would land on its
       links. */
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
  }

  .site-header.nav-open .site-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav > a,
  .nav-dropdown-toggle {
    display: flex;
    padding: 0.7rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .site-nav > a.active,
  .nav-dropdown-toggle.active {
    border-radius: var(--radius-sm);
    box-shadow: inset 3px 0 0 var(--color-primary-light);
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-dropdown-toggle::after {
    display: none;
  }

  .nav-dropdown::after {
    display: none;
  }

  /* submenus are always expanded on small screens; they inherit the
     panel's visibility rather than forcing their own, so they disappear
     (and stop taking clicks) together with the closed panel */
  .nav-dropdown-menu,
  .nav-dropdown:hover .nav-dropdown-menu,
  .nav-dropdown:focus-within .nav-dropdown-menu {
    position: static;
    min-width: 0;
    margin: 0 0 0.35rem 0.75rem;
    padding: 0 0 0 0.75rem;
    background: transparent;
    border: none;
    border-left: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: inherit;
    transform: none;
  }

  .nav-dropdown-menu a {
    padding: 0.45rem 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.92rem;
  }

  .nav-dropdown-menu a:hover,
  .nav-dropdown-menu a:focus-visible {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-white);
  }

  .nav-dropdown-menu a[target="_blank"]::after {
    color: rgba(255, 255, 255, 0.4);
  }

  .nav-tools {
    order: -1;
    margin: 0 0 0.75rem;
    padding: 0 0 0.75rem;
    border-left: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    justify-content: space-between;
  }

  .search-toggle {
    width: auto;
    height: auto;
    padding: 0.5rem 0.9rem;
    border-radius: var(--radius-pill);
    gap: 0.5rem;
  }

  .search-toggle .search-label {
    display: inline;
  }

  .page-header {
    padding: 2.5rem 0 2rem;
    margin-bottom: 2rem;
  }

  .cat-filter {
    position: static;
  }
}

@media (min-width: 961px) {
  .search-toggle .search-label {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --font-size-base: 16px;
    --gutter: 1.1rem;
    --section-gap: 3rem;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    padding: 2.5rem 0 2rem;
  }

  .cat-filter {
    align-items: stretch;
    flex-direction: column;
    gap: 0.5rem;
  }

  .cat-filter-trigger,
  .cat-filter-control--compact .cat-filter-trigger {
    min-width: 0;
    width: 100%;
  }

  .cat-filter-label + .cat-filter-control + .cat-filter-label {
    margin: 0.5rem 0 0;
  }

  .cat-filter-results {
    margin-left: 0;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .project-grid.complete {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .publication-entry,
  .thesis-entry {
    padding: 0.85rem 1rem;
  }

  .gallery-nav {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer,
  .language-switcher,
  .site-nav,
  .cat-filter,
  .gallery-lightbox {
    display: none !important;
  }

  .listing-item.is-beyond {
    display: block;
  }

  .year-more-bar {
    display: none;
  }

  body {
    font-size: 11pt;
    color: #000;
  }

  a {
    color: #000;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }

  .js .listing-item.collapsible .listing-content.closed {
    display: block;
  }

  .listing-toggle-icon {
    display: none;
  }

  .gallery img {
    position: static;
    opacity: 1;
    width: 100%;
    height: auto;
    object-fit: fill;
    margin-bottom: 0.5rem;
  }
}

/* the area filter hides cards via the hidden attribute; the card display rules must not override it */
.project-card[hidden] {
  display: none !important;
}

/* publications: reference stays visible under the title, details collapse below the badges */
.publication-entry .publication-meta {
  margin: 0.15rem 0 0;
}

.publication-entry .publication-categories {
  margin-top: 0.5rem;
}

.publication-entry:not(.collapsible) .listing-title {
  padding: 0.25rem 0;
}

/* thesis level label next to the student */
.thesis-type {
  display: inline-block;
  margin-left: 0.6rem;
  padding: 0.05rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--color-bg-muted);
  color: var(--color-text);
  font-size: 0.72rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.02em;
  vertical-align: 0.1em;
}

.thesis-type-master {
  background: var(--sky-100);
  color: var(--color-primary);
}

.thesis-type-dissertation {
  background: var(--area-ml-soft);
  color: var(--area-ml);
}