/* ============================================================
   The Delftia Project — Custom Styles
   ============================================================ */

/* ---- Color palette (Light Mode - Default) ----------------
   Logo-inspired orange and yellow decoration with dark amber text.
   ------------------------------------------------------------ */
:root,
html[data-theme="light"] {
  /* Delftia Brand Colors */
  --delftia-umber:     #1a1410;   /* professional dark base        */
  --delftia-umber-darker:#0a0805; /* high-contrast dark for titles on light bg */
  --delftia-gold:      #E8954B;   /* delftia orange accent (logo)  */
  --delftia-gold-bright:#F4A854;  /* delftia orange lighter        */
  --delftia-gold-glow: #FCE4C3;   /* delftia orange light glow     */
  --delftia-gold-hero: #E8954B;   /* delftia orange for dark bg    */
  --delftia-gold-hover:#D67E3E;   /* delftia orange hover state    */
  --delftia-yellow:    #FFDA73;
  --delftia-brand-gradient: linear-gradient(110deg, var(--delftia-gold), var(--delftia-yellow));
  --delftia-accent:    #704A1F;   /* delftia dark amber accent     */
  --delftia-cream:     var(--page-chip-bg);
  --delftia-light:     var(--page-bg-secondary);
  
  /* Light Mode Palette */
  --page-bg:           #ffffff;   /* light background              */
  --page-bg-secondary: #F9F5ED;   /* secondary light background    */
  --page-text:         #1a1208;   /* body text (19:1 on white)     */
  --page-text-secondary:#6B5B4C;  /* secondary text (13:1 on white)*/
  --page-heading:      #0a0805;
  --page-surface:      #ffffff;
  --page-border:       #E5D8CC;
  --page-accent:       #704A1F;
  --page-link:         #704A1F;
  --page-link-hover:   #5A3A15;
  --page-link-visited: #704A1F;
  --page-chip-bg:      #FAF7F0;
  --page-decoration:   #E8954B;
  --page-emoji-bg:     #ffffff;
  --page-decoration-opacity: 0.4;
  --page-shadow-color: rgba(0, 0, 0, 0.07);
  --page-hover-shadow-color: rgba(0, 0, 0, 0.12);
  --page-image-shadow-color: rgba(0, 0, 0, 0.12);
  --page-button-bg:    #1a1410;
  --page-button-text:  #ffffff;
  --page-button-hover: #3D2F0F;
  --delftia-text:      var(--page-text);
  --delftia-muted:     var(--page-text-secondary);
  
  /* Accessibility & Focus */
  --delftia-focus:     #0055B8;   /* wcag-compliant blue focus     */
  --delftia-title-dark:#F5E6D3;   /* refined light text on dark    */
  --delftia-subtitle-dark:#E8D9C9;/* refined subtitle on dark      */
  --delftia-hero-accent:#FFDA73;  /* bright delftia gold on dark   */
  --delftia-link-on-light:#704A1F; /* dark amber on light (AAA 7.8:1) */
  --delftia-link-hover-on-light:#5A3A15; /* darker amber hover (AAA 10:1) */
  --delftia-link-visited-on-light:#704A1F; /* visited dark amber on light */
  --delftia-accent-on-light:#704A1F; /* accent dark amber on light (AAA) */
  
  /* Fixed colors for always-dark sections */
  --delftia-link-on-dark: #F4A854;  /* delftia orange for dark mode  */
  --delftia-link-hover-on-dark: #FCE4C3; /* brighter orange on hover  */
  --delftia-link-visited-on-dark: #E8954B; /* muted orange visited     */
  
  /* Spacing & Timing */
  --card-radius:       12px;
  --transition-fast:   0.2s ease;
}

/* Explicit preferences are authoritative; only an unset theme follows the system. */
html[data-theme="dark"] {
  color-scheme: dark;
  --page-bg:           #0F0D0A;
  --page-bg-secondary: #1a1410;
  --page-text:         #F5E6D3;
  --page-text-secondary: #E8954B;
  --page-heading:      #F5E6D3;
  --page-surface:      #241b13;
  --page-border:       rgba(232, 149, 75, 0.3);
  --page-accent:       #F4A854;
  --page-link:         #F4A854;
  --page-link-hover:   #FCE4C3;
  --page-link-visited: #E8954B;
  --page-chip-bg:      rgba(232, 149, 75, 0.15);
  --page-decoration:   #FCE4C3;
  --page-emoji-bg:     #000000;
  --page-decoration-opacity: 0.6;
  --page-shadow-color: rgba(0, 0, 0, 0.4);
  --page-hover-shadow-color: rgba(232, 149, 75, 0.2);
  --page-image-shadow-color: rgba(232, 149, 75, 0.2);
  --page-button-bg:    #E8954B;
  --page-button-text:  #1a1410;
  --page-button-hover: #F4A854;
  --delftia-focus:     #FFDA73;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    color-scheme: dark;
    --page-bg:           #0F0D0A;
    --page-bg-secondary: #1a1410;
    --page-text:         #F5E6D3;
    --page-text-secondary: #E8954B;
    --page-heading:      #F5E6D3;
    --page-surface:      #241b13;
    --page-border:       rgba(232, 149, 75, 0.3);
    --page-accent:       #F4A854;
    --page-link:         #F4A854;
    --page-link-hover:   #FCE4C3;
    --page-link-visited: #E8954B;
    --page-chip-bg:      rgba(232, 149, 75, 0.15);
    --page-decoration:   #FCE4C3;
    --page-emoji-bg:     #000000;
    --page-decoration-opacity: 0.6;
    --page-shadow-color: rgba(0, 0, 0, 0.4);
    --page-hover-shadow-color: rgba(232, 149, 75, 0.2);
    --page-image-shadow-color: rgba(232, 149, 75, 0.2);
    --page-button-bg:    #E8954B;
    --page-button-text:  #1a1410;
    --page-button-hover: #F4A854;
    --delftia-focus:     #FFDA73;
  }
}

/* ---- Base Typography & HTML -------------------------------------- */
html {
  color-scheme: light;
  --bs-body-bg: var(--page-bg);
  --bs-body-color: var(--page-text);
  --bs-secondary-color: var(--page-text-secondary);
  --bs-heading-color: var(--page-heading);
  --bs-link-color: var(--page-link);
  --bs-link-hover-color: var(--page-link-hover);
  --bs-border-color: var(--page-border);
  scroll-behavior: smooth;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

body {
  color: var(--page-text);
  background-color: var(--page-bg);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--page-heading);
  transition: color var(--transition-fast);
}

/* Fix Quarto title block visibility for all pages */
#title-block-header,
.quarto-title-block {
  display: none;
}

/* Ensure custom hero sections are visible */
.hero-section {
  display: block;
}

/* Links inherit the active section's tokens. */
a {
  color: var(--page-link);
}

a:visited {
  color: var(--page-link-visited);
}

a:hover,
a:focus {
  color: var(--page-link-hover);
  text-decoration: underline;
}

.headroom,
#quarto-header,
#quarto-footer,
.page-footer,
.hero-section,
.cta-section {
  color-scheme: dark;
  --page-text: var(--delftia-title-dark);
  --page-text-secondary: var(--delftia-subtitle-dark);
  --page-heading: var(--delftia-title-dark);
  --page-link: var(--delftia-link-on-dark);
  --page-link-hover: var(--delftia-link-hover-on-dark);
  --page-link-visited: var(--delftia-link-visited-on-dark);
  --delftia-text: var(--page-text);
  --delftia-muted: var(--page-text-secondary);
  --page-button-bg: #E8954B;
  --page-button-text: #1a1410;
  --page-button-hover: #F4A854;
  --delftia-focus: #FFDA73;
}

/* ---- Navbar ----------------------------------------------- */
.headroom,
#quarto-header,
#quarto-header .navbar,
#quarto-header .navbar-collapse {
  background-color: var(--delftia-umber);
  transition: background-color var(--transition-fast);
}

.navbar {
  box-shadow: 0 2px 10px rgba(0,0,0,0.12);
  transition: box-shadow var(--transition-fast);
}

.navbar-brand,
#quarto-header .navbar-title,
#quarto-header .nav-link,
#quarto-header .nav-link .menu-text,
#quarto-header .quarto-navigation-tool {
  color: var(--delftia-gold-glow) !important;
  transition: color var(--transition-fast);
  font-weight: 500;
  white-space: nowrap;
}

.navbar-brand:hover,
.navbar-brand:focus,
#quarto-header .nav-link:hover,
#quarto-header .nav-link:focus,
#quarto-header .nav-link.active,
#quarto-header .nav-link.active .menu-text,
#quarto-header .quarto-navigation-tool:hover,
#quarto-header .quarto-navigation-tool:focus {
  color: var(--delftia-gold-bright) !important;
}

/* Ensure keyboard focus is visible on nav links */
#quarto-header .nav-link:focus-visible {
  outline: 2px solid var(--delftia-gold-bright);
  outline-offset: 2px;
}

@media (min-width: 992px) {
  #quarto-header .navbar-container {
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
  }

  #quarto-header .navbar-brand-container {
    flex-shrink: 0;
    margin-right: 0.5rem !important;
  }

  #quarto-header .navbar-collapse {
    display: flex !important;
    flex-basis: auto !important;
    flex-grow: 1;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: nowrap !important;
  }

  #quarto-header .navbar-nav {
    display: flex !important;
    flex-direction: row;
    flex-wrap: nowrap !important;
    align-items: center;
    gap: 0.25rem;
  }

  #quarto-header .nav-link {
    padding: 0.45rem 0.65rem;
    font-size: 0.95rem;
  }

  #quarto-header .quarto-navbar-tools {
    display: flex !important;
    align-items: center;
    flex-shrink: 0;
    margin-left: 0.5rem;
  }
}

@media (max-width: 991.98px) {
  #quarto-header .navbar-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }

  .navbar-brand-container {
    order: 1;
    flex: 1 1 auto;
  }

  .navbar-toggler {
    order: 2;
  }

  #quarto-header .quarto-navbar-tools {
    order: 3;
    width: 100%;
    display: flex;
    justify-content: flex-end;
    padding-top: 0.35rem;
    margin-top: 0.25rem;
    border-top: 1px solid rgba(232, 149, 75, 0.25);
  }

  #quarto-header .navbar-collapse {
    order: 4;
    width: 100%;
  }
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar-brand .navbar-logo {
  height: 42px;
  max-height: 42px;
  width: auto;
  display: block;
  flex-shrink: 0;
  opacity: 1;
  visibility: visible;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.22));
  background: white;
  border-radius: 8px;
  padding: 3px 6px;
}

@media (max-width: 480px) {
  .navbar-brand .navbar-logo {
    width: min(12vw, 42px);
    min-width: 24px;
    height: auto;
    max-height: 28px;
    flex-shrink: 1;
    padding: 2px 4px;
  }
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--delftia-focus);
  outline-offset: 3px;
}

/* Improved skip link styling for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--delftia-focus);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
  font-weight: 600;
  border-radius: 4px;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--delftia-umber);
  outline-offset: 2px;
}

/* ---- Hero section ----------------------------------------- */
.hero-section {
  background:
    radial-gradient(circle at 16% 18%, rgba(255, 218, 115, 0.12), transparent 40%),
    radial-gradient(circle at 84% 28%, rgba(255, 199, 44, 0.10), transparent 44%),
    linear-gradient(140deg, #000000 0%, #050505 40%, #0a0a0a 68%, #000000 100%);
  color: #ffffff;
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 5px solid #FFC72C;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 18%, rgba(255, 218, 115, 0.22) 0 2px, transparent 3px),
    radial-gradient(circle at 22% 72%, rgba(255, 199, 44, 0.20) 0 3px, transparent 4px),
    radial-gradient(circle at 34% 38%, rgba(255, 224, 130, 0.18) 0 2px, transparent 3px),
    radial-gradient(circle at 48% 82%, rgba(255, 199, 44, 0.18) 0 2.5px, transparent 4px),
    radial-gradient(circle at 63% 20%, rgba(255, 218, 115, 0.20) 0 2px, transparent 3px),
    radial-gradient(circle at 76% 58%, rgba(255, 199, 44, 0.18) 0 3px, transparent 4px),
    radial-gradient(circle at 90% 32%, rgba(255, 224, 130, 0.22) 0 2px, transparent 3px),
    linear-gradient(125deg, rgba(255, 218, 115, 0.08), transparent 45%, rgba(255, 199, 44, 0.08));
  z-index: 0;
  pointer-events: none;
}

.hero-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 0% 100%, rgba(255, 199, 44, 0.18), transparent 55%),
    radial-gradient(ellipse at 100% 0%, rgba(255, 218, 115, 0.16), transparent 55%);
  z-index: 1;
  pointer-events: none;
}

.hero-section > *,
.hero-section .hero-content {
  position: relative;
  z-index: 2;
}

.hero-section h1 {
  color: #FFFFFF;
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 1rem;
  margin-top: 0;
  text-shadow:
    0 0 2px rgba(255, 255, 200, 0.8),
    0 2px 0 rgba(83, 48, 3, 0.5),
    0 3px 12px rgba(0,0,0,0.5),
    0 0 20px rgba(232, 149, 75, 0.28);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 800;
}

html .hero-section h1,
html .hero-section h1[style*="font-size"],
html .hero-section .page-title,
html body:not(.home) .hero-section h1 {
  text-shadow: none;
}

.hero-section h1::after {
  content: "";
  display: block;
  width: 4rem;
  height: 4px;
  margin: 1rem auto 0;
  border-radius: 2px;
  background: linear-gradient(90deg, #FFC72C, #FFE082);
  box-shadow: 0 0 10px rgba(255, 199, 44, 0.5);
}

/* Ensure hero titles are visible with inline font-size overrides */
.hero-section h1[style*="font-size"] {
  color: #FFFFFF;
  font-weight: 800;
  text-shadow: 
    0 0 2px rgba(255, 255, 200, 0.9),
    0 2px 4px rgba(0, 0, 0, 0.8),
    0 3px 12px rgba(0, 0, 0, 0.7),
    0 0 20px rgba(232, 149, 75, 0.4);
}

.hero-section .hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--delftia-subtitle-dark);
  max-width: 680px;
  margin: 0 auto 2.2rem;
  line-height: 1.6;
  text-shadow: 
    0 1px 3px rgba(0, 0, 0, 0.6),
    0 2px 8px rgba(0, 0, 0, 0.5);
}

.hero-section .hero-subtitle em,
.cta-section p em {
  color: var(--delftia-hero-accent);
}

/* ---- Buttons ---------------------------------------------- */
.btn-hero {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none !important;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
  margin: 0.4rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-hero--compact {
  padding: 0.55rem 1.4rem;
  font-size: 0.9rem;
}

.hero-section--compact {
  padding: 3.5rem 2rem 3rem;
}

.hero-section--compact h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.hero-section--compact .hero-subtitle {
  font-size: 1.05rem;
}

.btn-hero:focus-visible {
  outline: 3px solid var(--delftia-focus);
  outline-offset: 3px;
}

.btn-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.22);
}

.btn-primary-hero {
  background: linear-gradient(135deg, #FFC72C 0%, #FFE082 50%, #FFB81C 100%);
  color: #000000 !important;
  font-weight: 700;
  border: 1px solid #FFE082;
  box-shadow: 0 10px 24px rgba(0,0,0,0.35), 0 0 20px rgba(255, 199, 44, 0.35);
}

.btn-primary-hero:hover {
  background: linear-gradient(135deg, #FFD54F 0%, #FFF9C4 50%, #FFC72C 100%);
  color: #000000 !important;
  box-shadow: 0 12px 28px rgba(0,0,0,0.45), 0 0 25px rgba(255, 218, 115, 0.5);
}

.btn-outline-hero {
  background: transparent;
  color: #FFE082 !important;
  font-weight: 700;
  border: 2px solid #FFC72C;
  box-shadow: inset 0 0 0 1px rgba(255, 199, 44, 0.25), 0 0 15px rgba(255, 199, 44, 0.15);
}

.btn-outline-hero:hover {
  background: rgba(255, 199, 44, 0.2);
  color: #FFFFFF !important;
  border-color: #FFE082;
  box-shadow: inset 0 0 0 1px rgba(255, 224, 130, 0.35), 0 0 20px rgba(255, 199, 44, 0.3);
}

/* ---- Stats bar -------------------------------------------- */
.stats-bar {
  background: var(--page-bg-secondary);
  color: var(--page-text);
  padding: 2rem 1rem;
  text-align: center;
  border-bottom: 3px solid var(--page-decoration);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.stats-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.stat-item {
  flex: 1 1 calc(33.333% - 2.666rem);
  min-width: 150px;
}

.stat-item .stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--page-accent);
  transition: color var(--transition-fast);
}

.stat-item .stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--delftia-muted);
  margin-top: 0.3rem;
  line-height: 1;
  transition: color var(--transition-fast);
}

/* ---- Section containers ----------------------------------- */
.section-padded {
  padding: 4rem 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-alt {
  background: var(--page-bg-secondary);
  transition: background-color var(--transition-fast);
}

.research-highlights {
  padding: 4rem 1.5rem;
}

.research-highlights-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

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

.gallery-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--card-radius);
  box-shadow: 0 2px 10px var(--page-image-shadow-color);
}

.research-spotlight--alt {
  background: var(--page-bg-secondary);
  border-radius: var(--card-radius);
}

.spotlight-image {
  max-height: 380px;
  width: 100%;
  object-fit: cover;
}

.research-spotlight .spotlight-image img,
.research-spotlight img.spotlight-image {
  max-height: 380px;
  width: 100%;
  object-fit: cover;
}

.get-involved-grid {
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.involvement-note {
  text-align: center;
  padding: 1rem 0 2rem;
}

.content-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.reference-note {
  background: var(--page-bg-secondary);
  border-left: 4px solid var(--page-decoration);
  padding: 1rem 1.4rem;
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--page-text);
  margin-bottom: 2rem;
}

.archive-note {
  margin: 0 auto 2rem;
  padding: 0.9rem 1.2rem;
  border-left: 4px solid var(--page-decoration);
  background: var(--page-bg-secondary);
  color: var(--page-text);
  border-radius: 8px;
}

.timeline-tags {
  margin-top: 0.8rem;
}

.news-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.news-image-grid img {
  width: 100%;
  max-height: 160px;
  object-fit: cover;
  border-radius: 8px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  color: var(--page-heading);
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
  font-weight: 700;
}

/* High-contrast page titles for accessibility */
.page-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
  color: var(--page-heading);
}

/* Page titles on dark backgrounds (hero sections) */
.hero-section .page-title {
  color: #FFFFFF;
  text-shadow: 
    0 0 2px rgba(255, 255, 200, 0.9),
    0 2px 4px rgba(0, 0, 0, 0.8),
    0 3px 12px rgba(0, 0, 0, 0.7),
    0 0 20px rgba(232, 149, 75, 0.4);
}

.section-subtitle {
  color: var(--delftia-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
  transition: color var(--transition-fast);
}

.quarto-figure figure > figcaption,
.quarto-float-caption {
  color: var(--page-text-secondary);
}

/* ---- Feature / info cards --------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.6rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--page-surface);
  color: var(--page-text);
  border-radius: var(--card-radius);
  padding: 2rem 1.8rem;
  box-shadow: 0 2px 12px var(--page-shadow-color);
  border-left: 4px solid var(--page-decoration);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--page-hover-shadow-color);
}

.feature-card .card-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 12px;
  background: var(--page-emoji-bg);
}

.feature-card h3 {
  font-size: 1.15rem;
  color: var(--page-heading);
  margin-bottom: 0.6rem;
  transition: color var(--transition-fast);
  font-weight: 700;
}

.feature-card p {
  color: var(--delftia-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  transition: color var(--transition-fast);
}

/* ---- News cards ------------------------------------------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 1.6rem;
  margin-top: 2rem;
}

.news-card {
  background: var(--page-surface);
  color: var(--page-text);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: 0 2px 12px var(--page-shadow-color);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--page-hover-shadow-color);
}

.news-card-body {
  padding: 1.4rem 1.6rem 1.6rem;
}

.news-card-date {
  font-size: 0.78rem;
  color: var(--page-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
  transition: color var(--transition-fast);
}

.news-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--page-heading);
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.news-card-text {
  font-size: 0.9rem;
  color: var(--delftia-muted);
  line-height: 1.55;
  transition: color var(--transition-fast);
}

/* ---- CTA / call-to-action section ------------------------- */
.cta-section {
  background:
    radial-gradient(circle at 15% 20%, rgba(232, 149, 75, 0.10), transparent 34%),
    linear-gradient(135deg, #0F0D0A, #1A1410 52%, #2A2420);
  color: var(--delftia-gold-glow);
  padding: 4rem 2rem;
  text-align: center;
}

.cta-section h2 {
  color: var(--delftia-title-dark);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 0.8rem;
  text-shadow: 0 3px 10px rgba(0, 0, 0, 0.5);
}

.cta-section p {
  color: var(--delftia-subtitle-dark);
  max-width: 580px;
  margin: 0 auto 2rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ---- Research spotlight ----------------------------------- */
.research-spotlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.research-spotlight.reverse {
  direction: rtl;
}

.research-spotlight.reverse > * {
  direction: ltr;
}

.research-spotlight-text h3 {
  font-size: 1.4rem;
  color: var(--page-heading);
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
  font-weight: 700;
}

.research-spotlight.reverse > :first-child {
  order: 2;
}

.research-spotlight.reverse > :last-child {
  order: 1;
}

.research-spotlight img {
  width: 100%;
  border-radius: var(--card-radius);
  box-shadow: 0 6px 24px var(--page-image-shadow-color);
  object-fit: cover;
  transition: box-shadow var(--transition-fast);
}

.research-spotlight-text h2 {
  font-size: 1.7rem;
  color: var(--page-heading);
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
  font-weight: 700;
}

.research-spotlight-text p {
  color: var(--delftia-muted);
  line-height: 1.7;
  margin-bottom: 1.2rem;
  transition: color var(--transition-fast);
}

/* ---- Badge / tag chips ------------------------------------ */
.tag-chip {
  display: inline-block;
  background: var(--page-chip-bg);
  color: var(--page-heading);
  border: 1px solid var(--page-decoration);
  border-radius: 50px;
  padding: 0.2rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  margin: 0.2rem;
  transition: all var(--transition-fast);
}

/* ---- Team cards ------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1.4rem;
  margin-top: 2rem;
}

.team-card {
  background: var(--page-surface);
  color: var(--page-text);
  border-radius: var(--card-radius);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: 0 2px 12px var(--page-shadow-color);
  transition: transform var(--transition-fast);
}

.team-card:hover {
  transform: translateY(-3px);
}

.team-card .team-avatar {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, #111111, var(--delftia-gold));
  color: white;
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.team-card h3 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.team-card .team-role {
  font-size: 0.82rem;
  color: var(--delftia-muted);
}

/* ---- Timeline (news page) --------------------------------- */
.timeline {
  position: relative;
  padding-left: 2.5rem;
  max-width: 860px;
  margin: 2rem auto 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--page-decoration);
  border-radius: 2px;
  opacity: var(--page-decoration-opacity);
  transition: background-color var(--transition-fast), opacity var(--transition-fast);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.15rem;
  top: 0.45rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--page-decoration);
  border: 3px solid var(--page-bg);
  box-shadow: 0 0 0 2px var(--page-decoration);
  transition: all var(--transition-fast);
}

.timeline-date {
  font-size: 0.78rem;
  color: var(--page-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
  transition: color var(--transition-fast);
}

.timeline-card {
  background: var(--page-surface);
  color: var(--page-text);
  border-radius: var(--card-radius);
  padding: 1.4rem 1.6rem;
  box-shadow: 0 2px 10px var(--page-shadow-color);
  border-left: 3px solid var(--page-decoration);
  transition: all var(--transition-fast);
}

.timeline-card h2 {
  font-size: 1.05rem;
  color: var(--page-heading);
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
  font-weight: 700;
}

.timeline-card p {
  font-size: 0.91rem;
  color: var(--delftia-muted);
  line-height: 1.6;
  margin: 0;
  transition: color var(--transition-fast);
}

/* ---- References page -------------------------------------- */
.ref-list {
  list-style: none;
  padding: 0;
  max-width: 860px;
  margin: 2rem auto 0;
}

.ref-list li {
  background: var(--page-surface);
  border-radius: var(--card-radius);
  padding: 1.2rem 1.6rem;
  margin-bottom: 1rem;
  box-shadow: 0 2px 8px var(--page-shadow-color);
  font-size: 0.93rem;
  line-height: 1.6;
  border-left: 3px solid var(--page-decoration);
  color: var(--delftia-muted);
}

/* ---- Visually-hidden utility (WCAG — off-screen text for AT) */
.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 navigation link (WCAG 2.4.1 Bypass Blocks) ----- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: 0.5rem 1.2rem;
  background: var(--delftia-umber);
  color: white !important;
  font-weight: 600;
  text-decoration: none !important;
  border-radius: 0 0 8px 0;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--delftia-focus);
  outline-offset: 2px;
}

/* Hero section on non-home pages (WCAG 2.2 AA compliant) ---------- */
body:not(.home) .hero-section h1 {
  color: var(--delftia-title-dark);
  text-shadow:
    0 0 2px rgba(255, 255, 200, 0.8),
    0 2px 4px rgba(0, 0, 0, 0.6),
    0 3px 10px rgba(0, 0, 0, 0.5);
}

body:not(.home) .hero-section .hero-subtitle {
  color: var(--delftia-subtitle-dark);
  text-shadow:
    0 1px 3px rgba(0, 0, 0, 0.7),
    0 2px 8px rgba(0, 0, 0, 0.6);
}

/* Links ------------------------------------------------------------ */
body:not(.home) a:not(.btn):not(.nav-link):not(.navbar-brand):not(.skip-link):not([class*="btn-"]) {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Focus styles ----------------------------------------------------- */
body:not(.home) :focus-visible {
  outline: 3px solid var(--delftia-focus);
  outline-offset: 3px;
}

/* ---- Reduced-motion (progressive enhancement for vestibular users) ------ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Footer & Page Footer ---------------------------------- */
#quarto-footer,
.page-footer {
  background-color: var(--delftia-umber);
  color: var(--delftia-gold-glow);
  padding: 2rem 1rem;
  border-top: 3px solid var(--delftia-gold);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

#quarto-footer a,
.page-footer a,
#quarto-footer a:visited,
.page-footer a:visited {
  color: var(--delftia-gold-glow);
}

#quarto-footer a:hover,
.page-footer a:hover,
#quarto-footer a:focus,
.page-footer a:focus {
  color: var(--delftia-gold-bright);
}

/* ---- Content area styling for dark mode ------------------- */
.content,
#quarto-document-content,
.page-columns {
  background-color: var(--page-bg);
  color: var(--page-text);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* ---- Cards and secondary content areas -------------------- */
.card,
.feature-card,
.news-card,
.timeline-card,
.team-card,
.ref-list li,
.stats-bar {
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.card {
  --bs-card-bg: var(--page-surface);
  --bs-card-color: var(--page-text);
  --bs-card-border-color: var(--page-border);
  background-color: var(--page-surface);
  color: var(--page-text);
  border-color: var(--page-border);
}

.feature-card,
.news-card,
.team-card,
.timeline-card,
.ref-list li {
  border: 1px solid var(--page-border);
  border-top: 3px solid var(--page-decoration);
}

/* ---- Theme toggle button styling -------------------------- */
.theme-toggle,
.reading-toggle {
  background: transparent;
  border: 1.5px solid var(--delftia-gold-glow);
  color: var(--delftia-gold-glow);
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 38px;
}

.theme-toggle:hover,
.theme-toggle:focus,
.reading-toggle:hover,
.reading-toggle:focus {
  background-color: rgba(232, 149, 75, 0.15);
  color: var(--delftia-gold-bright);
  border-color: var(--delftia-gold-bright);
}

.theme-toggle:focus-visible,
.reading-toggle:focus-visible {
  outline: 3px solid var(--delftia-focus);
  outline-offset: 2px;
}

.display-controls {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0;
  border-top: none;
}

.reading-toggle[aria-pressed="true"] {
  background: var(--delftia-yellow);
  color: var(--delftia-umber);
  border-color: var(--delftia-yellow);
}

/* Reading focus keeps all content and navigation available. */
html[data-reading-focus="true"] #quarto-content {
  display: block;
}

html[data-reading-focus="true"] #quarto-document-content {
  display: block;
  max-width: 76ch;
  margin-inline: auto;
  padding: 1.5rem clamp(1rem, 4vw, 2rem);
  font-size: 1.125rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

html[data-reading-focus="true"] :is(.card-grid, .news-grid, .team-grid, .research-spotlight) {
  grid-template-columns: minmax(0, 1fr);
}

html[data-reading-focus="true"] :is(.feature-card, .news-card, .team-card, .timeline-card, .ref-list li) {
  transform: none;
  box-shadow: none;
}

html[data-reading-focus="true"] :is(.feature-card, .news-card, .team-card, .timeline-card, .research-spotlight) p {
  font-size: 1em;
  line-height: inherit;
}

html[data-reading-focus="true"] .hero-section::before,
html[data-reading-focus="true"] .hero-section::after {
  display: none;
}

html[data-reading-focus="true"] .hero-section,
html[data-reading-focus="true"] .cta-section {
  background: var(--delftia-umber);
  padding: 2rem 1rem;
}

.theme-toggle-icon {
  display: inline-block;
  width: 1.2em;
  height: 1.2em;
  margin-right: 0.3rem;
}

/* ---- Responsive ------------------------------------------- */
@media (max-width: 768px) {
  .research-spotlight,
  .research-spotlight.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .hero-section {
    padding: 3.5rem 1.2rem 3rem;
  }

  .stats-grid {
    gap: 1.5rem 2.5rem;
  }

  .section-padded {
    padding: 3rem 1rem;
  }
  
  .theme-toggle,
  .reading-toggle {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .navbar-brand {
    gap: 0.4rem;
    min-width: 0;
  }

  #quarto-header .navbar-title {
    font-size: 1rem;
  }

  .display-controls {
    justify-content: center;
  }

  .hero-actions {
    display: grid;
    gap: 0.5rem;
  }

  .btn-hero {
    max-width: 100%;
    padding-inline: 1rem;
    margin-inline: 0;
    white-space: normal;
  }

  .feature-card {
    padding: 1.5rem 1rem;
  }
}

.dashboard-list li {
  margin-bottom: 1.5rem;
  overflow-wrap: anywhere;
}

.dashboard-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}

.dashboard-metric {
  display: grid;
  gap: 0.2rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--page-border);
  border-top: 3px solid var(--page-decoration);
  border-radius: var(--card-radius);
  background: var(--page-surface);
  box-shadow: 0 2px 10px var(--page-shadow-color);
}

.dashboard-metric-value {
  color: var(--delftia-gold);
  background: var(--delftia-umber);
  border-radius: 0.25rem;
  padding: 0.2rem 0.4rem;
  width: fit-content;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.2;
}

.dashboard-metric-label {
  color: var(--page-text-secondary);
  font-size: 0.9rem;
}

.dashboard-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 0.75rem 1rem;
  margin-bottom: 0.5rem;
}

.dashboard-controls label {
  display: grid;
  flex: 1 1 280px;
  gap: 0.35rem;
  color: var(--page-text);
  font-weight: 600;
}

.dashboard-controls input {
  width: 100%;
  min-height: 2.8rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--page-border);
  border-radius: 8px;
  background: var(--page-surface);
  color: var(--page-text);
}

.dashboard-controls input::placeholder {
  color: var(--page-text-secondary);
  opacity: 0.85;
}

.dashboard-controls .btn {
  margin: 0;
}

.dashboard-results-status {
  min-height: 1.5em;
  color: var(--page-text-secondary);
  font-size: 0.92rem;
}

.dashboard-panel {
  margin: 1rem 0 2rem;
  padding: 1.25rem;
  border: 1px solid var(--page-border);
  border-radius: var(--card-radius);
  background: var(--page-surface);
  box-shadow: 0 2px 12px var(--page-shadow-color);
}

.dashboard-panel > :last-child {
  margin-bottom: 0;
}

.genome-selection-field {
  margin-bottom: 1rem;
}

.genome-selection-field label {
  display: block;
  margin-bottom: 0.4rem;
}

.genome-selection-field select,
.genome-selection-field input {
  width: 100%;
  min-width: 0;
  padding: 0.5rem;
  border: 1px solid var(--page-border);
  border-radius: 0.25rem;
  color: var(--page-text);
  background: var(--page-bg);
}

.genome-comparison-table-wrap {
  max-width: 100%;
  margin: 1rem 0 2rem;
  overflow-x: auto;
}

.genome-comparison-table-wrap table {
  width: 100%;
  min-width: 38rem;
  border-collapse: collapse;
  color: var(--page-text);
}

.genome-comparison-table-wrap caption {
  color: var(--page-text-secondary);
}

.genome-comparison-table-wrap th,
.genome-comparison-table-wrap td {
  padding: 0.75rem;
  border: 1px solid var(--page-border);
  text-align: left;
  vertical-align: top;
}

.genome-comparison-table-wrap th {
  background: var(--page-bg-secondary);
  color: var(--page-heading);
}

.genome-comparison-table-wrap tbody th {
  min-width: 10rem;
}

.dashboard-chart {
  list-style: none;
  padding: 0;
  max-height: 30rem;
  overflow-y: auto;
}

.dashboard-chart-row {
  display: grid;
  grid-template-columns: minmax(5rem, 2fr) minmax(2rem, 3fr) minmax(2rem, auto);
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  padding: 0.35rem;
  overflow-wrap: anywhere;
}

.dashboard-chart-row:hover,
.dashboard-chart-row:focus-visible {
  outline: 2px solid var(--page-link);
  outline-offset: -2px;
}

.dashboard-chart-track {
  height: 1rem;
  background: var(--page-border);
  border-radius: 0.2rem;
  overflow: hidden;
}

.dashboard-chart-bar {
  display: block;
  height: 100%;
  background: var(--delftia-brand-gradient);
}

.dashboard-chart-count {
  color: var(--delftia-yellow);
  background: var(--delftia-umber);
  border-radius: 0.25rem;
  padding: 0.2rem 0.4rem;
  text-align: center;
}

.dashboard-chart-detail {
  min-height: 1.5em;
}

.dashboard-panel select {
  max-width: 100%;
  min-height: 44px;
  background: var(--page-surface);
  color: var(--page-text);
  border: 1px solid var(--page-border);
  border-radius: 0.25rem;
}

.dashboard-list li[hidden] {
  display: none;
}

.dashboard-line-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1rem;
}

.dashboard-line-legend legend {
  font-size: 1rem;
  font-weight: 600;
}

.dashboard-line-legend label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 44px;
  cursor: pointer;
}

.growth-swatch {
  width: 1.5rem;
  height: 0.4rem;
  background: var(--growth-color);
  border: 1px solid #1a1410;
}

.growth-publications { --growth-color: #E8954B; }
.growth-cumulative-publications { --growth-color: #79C0FF; }
.growth-genomes { --growth-color: #B0B0B0; }
.growth-cumulative-genomes,
.growth-cumulative { --growth-color: #FFDA73; }

.dashboard-line-scroll {
  max-width: 100%;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.dashboard-line-chart {
  display: block;
  width: 100%;
  min-width: 560px;
  background: #1a1410;
  border-radius: 0.25rem;
}

.dashboard-line-chart text {
  fill: #f5f0e8;
  font: 13px sans-serif;
}

.growth-grid {
  stroke: #665b50;
}

.growth-series polyline {
  stroke: var(--growth-color);
  stroke-width: 3;
}

.growth-series circle {
  fill: var(--growth-color);
}

.growth-cumulative-publications polyline { stroke-dasharray: 4 3; }
.growth-genomes polyline { stroke-dasharray: 7 4; }
.growth-cumulative-genomes polyline,
.growth-cumulative polyline { stroke-dasharray: 2 4; }

.growth-marker {
  stroke: #f5f0e8;
  stroke-dasharray: 4 4;
  pointer-events: none;
}

#growth-chart-year {
  display: block;
  width: 100%;
  min-height: 44px;
}

.nav-footer .footer-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.footer-github-icon {
  display: inline-block;
  vertical-align: middle;
  color: var(--delftia-gold-glow);
  transition: color var(--transition-fast);
  margin: 0 0.25rem;
}

.nav-footer a:hover .footer-github-icon,
.nav-footer a:focus .footer-github-icon {
  color: var(--delftia-gold-bright);
}