/* 
 * Graeaex - Scientific 3D Visualization
 * Custom Stylesheet (Pure CSS)
 * Visual Tone: Respectable, Academic, Scientific, Quietly Elegant, Museum-like
 */

/* ==========================================================================
   1. Design System & CSS Variables
   ========================================================================== */
:root {
  /* Colors - Scientific Editorial Palette (Warm Organic / Cultural Theme) */
  --color-surface: #FAF8F5; /* Warm Alabaster */
  --color-surface-dim: #E6E2D8;
  --color-surface-bright: #FAF8F5;
  --color-surface-paper: #F3ECE1; /* Warm Sandstone Parchment */
  --color-surface-container-lowest: #FFFFFF;
  --color-surface-container-low: #F5EFE4;
  --color-surface-container: #ECE5D7;
  --color-surface-container-high: #E3D9C9;
  --color-surface-container-highest: #D9CDBC;
  
  --color-on-surface: #262421; /* Rich Earth Charcoal */
  --color-on-surface-variant: #59544C; /* Warm Charcoal Variant */
  --color-inverse-surface: #1E1C1A;
  --color-inverse-on-surface: #FAF8F5;
  
  --color-outline: #8C8475;
  --color-outline-variant: #E3D9C9;
  --color-subtle-divider: #CFBFAC;
  
  /* Primary & Accent Brand Colors - Warm Organic & Cultural Muse */
  --color-primary: #1F2D28; /* Academic Deep Cypress Green */
  --color-on-primary: #FFFFFF;
  --color-deep-science-blue: #2C3E37; /* Curated deep forest sage */
  --color-ink-charcoal: #231E1B;
  --color-accent-terracotta: #A85942; /* Ancient Terracotta Red-Clay */
  --color-accent-ochre: #C08D43; /* Scientific Ochre/Amber */
  --color-accent-sage: #5A7568; /* Historical Botanical Sage */
  --color-accent-blue: #5A7568;
  
  /* Typography */
  --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", Menlo, Monaco, Consolas, monospace;

  /* Spacing Base (8px unit) */
  --spacing-unit: 8px;
  --spacing-gutter: 24px;
  --spacing-margin-mobile: 16px;
  --spacing-margin-desktop: 64px;
  --max-width: 1280px;

  /* Corner Radius */
  --radius-sm: 2px;
  --radius-default: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   2. Reset & Core Styles
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

p {
  color: var(--color-on-surface-variant);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   3. Utility Classes & Typography Scales
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--spacing-margin-mobile);
  padding-right: var(--spacing-margin-mobile);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-margin-desktop);
    padding-right: var(--spacing-margin-desktop);
  }
}

/* Typography Scales */
.display-lg {
  font-size: 2.5rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .display-lg {
    font-size: 3.5rem;
  }
}

.headline-lg {
  font-size: 1.75rem;
  line-height: 1.25;
}

@media (min-width: 768px) {
  .headline-lg {
    font-size: 2rem;
  }
}

.headline-md {
  font-size: 1.25rem;
  line-height: 1.35;
  font-weight: 600;
}

@media (min-width: 768px) {
  .headline-md {
    font-size: 1.5rem;
  }
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.6;
}

.body-md {
  font-size: 1rem;
  line-height: 1.5;
}

.body-sm {
  font-size: 0.875rem;
  line-height: 1.45;
}

.label-caps {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.font-mono {
  font-family: var(--font-mono);
}

.italic-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--color-on-surface-variant);
}

/* Base Layout Spacing */
.py-section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

@media (min-width: 768px) {
  .py-section {
    padding-top: 8rem;
    padding-bottom: 8rem;
  }
}

/* Dividers */
.divider {
  height: 1px;
  background-color: var(--color-outline-variant);
  width: 100%;
}

.divider-subtle {
  height: 1px;
  background-color: var(--color-subtle-divider);
  width: 100%;
}

/* ==========================================================================
   4. Navigation Bar
   ========================================================================== */
.navbar {
  background-color: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 100;
  border-b: 1px solid var(--color-outline-variant);
  transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  height: 36px;
  width: 36px;
  object-fit: contain;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--spacing-gutter);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  color: var(--color-on-surface-variant);
  font-weight: 500;
  font-size: 0.8125rem; /* ~13px label caps style */
}

.nav-link:hover {
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 0.75rem; /* label-caps size */
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent-terracotta);
  color: var(--color-on-primary);
  border: 1px solid var(--color-accent-terracotta);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink-charcoal);
  border: 1px solid var(--color-ink-charcoal);
}

.btn-secondary:hover {
  background-color: var(--color-surface-container);
}

.btn-nav {
  padding: 8px 16px;
}

.menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile Menu Panel */
.mobile-nav {
  position: fixed;
  top: 80px;
  left: 0;
  width: 100%;
  background-color: var(--color-surface-paper);
  border-bottom: 1px solid var(--color-outline-variant);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 99;
  transform: translateY(-120%);
  transition: transform var(--transition-normal);
}

.mobile-nav.open {
  transform: translateY(0);
}

.mobile-nav .nav-link {
  font-size: 1rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-surface-container);
}

/* ==========================================================================
   5. Hero Section
   ========================================================================== */
.hero-section {
  background: linear-gradient(180deg, var(--color-surface) 30%, var(--color-surface-paper) 100%);
  border-bottom: 1px solid var(--color-outline-variant);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: var(--spacing-gutter);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-cols: repeat(12, 1fr);
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

@media (min-width: 768px) {
  .hero-content {
    grid-column: span 6;
  }
}

.hero-tagline {
  color: var(--color-accent-terracotta);
  letter-spacing: 0.2em;
}

.hero-title {
  margin-top: -8px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 12px;
}

.hero-visual {
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .hero-visual {
    grid-column: span 6;
    margin-top: 0;
  }
}

.fig-container {
  position: relative;
}

.fig-frame {
  position: relative;
}

.fig-frame::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  right: -16px;
  bottom: -16px;
  border: 1px solid var(--color-accent-ochre);
  z-index: -1;
  transition: transform var(--transition-slow);
}

.fig-container:hover .fig-frame::before {
  transform: translate(-8px, -8px);
}

.fig-img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
  border: 1px solid var(--color-outline-variant);
}

.fig-container:hover .fig-img {
  transform: scale(1.02);
}

.fig-caption-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding: 0 4px;
}

.fig-caption {
  font-family: var(--font-sans);
  font-size: 0.6875rem; /* ~11px */
  color: var(--color-outline);
  font-style: italic;
}

.fig-tech-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-outline);
  letter-spacing: 0.05em;
}

.hero-bg-accent {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 33.333%;
  height: 100%;
  opacity: 0.03;
  pointer-events: none;
}

.hero-bg-accent img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ==========================================================================
   6. About Section (Institutional Standards)
   ========================================================================== */
.about-section {
  background-color: var(--color-surface-paper);
  border-bottom: 1px solid var(--color-outline-variant);
}

.about-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: var(--spacing-gutter);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-cols: 1fr 2fr;
    gap: 80px;
  }
}

.about-header h2 {
  border-top: 4px solid var(--color-accent-terracotta);
  padding-top: 1.5rem;
  display: inline-block;
  width: 100%;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-metrics {
  display: grid;
  grid-template-cols: repeat(2, 1fr);
  gap: var(--spacing-gutter);
  padding-top: 2rem;
  border-top: 1px solid var(--color-subtle-divider);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent-terracotta);
  line-height: 1;
}

.metric-label {
  margin-top: 4px;
}

/* ==========================================================================
   7. Capabilities Section
   ========================================================================== */
.capabilities-section {
  background-color: var(--color-surface);
}

.section-intro-header {
  margin-bottom: 4rem;
}

.section-intro-header h2 {
  margin-bottom: 16px;
}

.capabilities-grid {
  display: grid;
  grid-template-cols: 1fr;
  border: 1px solid var(--color-outline-variant);
}

@media (min-width: 768px) {
  .capabilities-grid {
    grid-template-cols: repeat(5, 1fr);
  }
}

.capability-card {
  padding: 32px;
  background-color: var(--color-surface);
  transition: background-color var(--transition-fast);
  border-bottom: 1px solid var(--color-outline-variant);
}

@media (min-width: 768px) {
  .capability-card {
    border-bottom: none;
    border-right: 1px solid var(--color-outline-variant);
  }
  
  .capability-card:last-child {
    border-right: none;
  }
}

.capability-card:hover {
  background-color: var(--color-surface-container-low);
}

.capability-icon {
  color: var(--color-accent-sage);
  margin-bottom: 24px;
  display: block;
}

.capability-icon svg {
  width: 32px;
  height: 32px;
}

.capability-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

/* ==========================================================================
   8. Gallery Section (Research Archive)
   ========================================================================== */
.gallery-section {
  background-color: var(--color-surface-paper);
  border-top: 1px solid var(--color-outline-variant);
  border-bottom: 1px solid var(--color-outline-variant);
}

.gallery-intro {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 4rem;
}

@media (min-width: 768px) {
  .gallery-intro {
    flex-direction: row;
    align-items: flex-end;
  }
}

.gallery-desc {
  max-width: 320px;
  text-align: left;
}

@media (min-width: 768px) {
  .gallery-desc {
    text-align: right;
  }
}

.gallery-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: 40px;
}

@media (min-width: 768px) {
  .gallery-grid {
    grid-template-cols: repeat(3, 1fr);
  }
}

.gallery-item {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.item-wrapper {
  border: 1px solid var(--color-outline-variant);
  padding: 8px;
  background-color: var(--color-surface-container-lowest);
  transition: transform var(--transition-normal);
}

.gallery-item:hover .item-wrapper {
  transform: translateY(-8px);
}

.item-frame {
  aspect-ratio: 1 / 1;
  background-color: var(--color-surface-container);
  overflow: hidden;
  position: relative;
}

.item-frame a {
  display: block;
  width: 100%;
  height: 100%;
}

.item-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover .item-img {
  transform: scale(1.05);
}

.item-hover-indicator {
  position: absolute;
  top: 16px;
  right: 16px;
  background-color: rgba(26, 26, 27, 0.85);
  color: var(--color-on-primary);
  padding: 8px;
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-item:hover .item-hover-indicator {
  opacity: 1;
}

.item-hover-indicator svg {
  width: 18px;
  height: 18px;
}

.item-caption {
  margin-top: 16px;
}

.item-catalogue {
  color: var(--color-accent-terracotta);
  font-size: 0.625rem;
  display: block;
  margin-bottom: 4px;
}

.item-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.item-desc {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
}

/* ==========================================================================
   9. Credibility / Collaboration Section
   ========================================================================== */
.credibility-section {
  background-color: var(--color-surface);
}

.credibility-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: var(--spacing-gutter);
  align-items: center;
}

@media (min-width: 768px) {
  .credibility-grid {
    grid-template-cols: 1fr 1fr;
    gap: 80px;
  }
}

.credibility-content {
  max-width: 480px;
}

.credibility-content h2 {
  margin-bottom: 1.5rem;
}

.credibility-content p {
  margin-bottom: 2rem;
}

.credibility-quote {
  border-left: 2px solid var(--color-subtle-divider);
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quote-text {
  font-style: italic;
  font-size: 0.875rem;
  color: var(--color-on-surface);
  line-height: 1.5;
}

.quote-author {
  font-size: 0.6875rem;
  color: var(--color-outline);
}

.credibility-partners {
  display: grid;
  grid-template-cols: repeat(2, 1fr);
  gap: 16px;
}

.partner-box {
  height: 160px;
  background-color: var(--color-surface-container-high);
  border: 1px solid var(--color-outline-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  transition: background-color var(--transition-fast);
}

.partner-box:nth-child(even) {
  background-color: var(--color-surface-container);
}

.partner-box:hover {
  background-color: var(--color-surface-container-highest);
}

.partner-text {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-outline);
  opacity: 0.55;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-align: center;
  user-select: none;
}

/* ==========================================================================
   10. Analytical Process Section
   ========================================================================== */
.process-section {
  background-color: var(--color-deep-science-blue);
  color: var(--color-on-primary);
}

.process-section h2 {
  color: var(--color-on-primary);
  text-align: center;
  margin-bottom: 4rem;
}

.process-grid {
  display: grid;
  grid-template-cols: 1fr;
  gap: 40px;
  position: relative;
}

@media (min-width: 768px) {
  .process-grid {
    grid-template-cols: repeat(3, 1fr);
    gap: var(--spacing-gutter);
  }
  
  /* Connecting line on desktop */
  .process-grid::before {
    content: "";
    position: absolute;
    top: 32px;
    left: 10%;
    right: 10%;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.15);
    z-index: 0;
  }
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background-color: var(--color-on-primary);
  color: var(--color-deep-science-blue);
  font-weight: 700;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
}

.step-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-on-primary);
}

.step-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 280px;
  margin: 0 auto;
}

/* ==========================================================================
   11. Contact Section
   ========================================================================== */
.contact-section {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-container-low) 100%);
  border-top: 1px solid var(--color-outline-variant);
}

.contact-container {
  max-width: 768px;
  margin: 0 auto;
  text-align: center;
}

.contact-icon {
  color: var(--color-primary);
  margin-bottom: 2rem;
  display: inline-block;
}

.contact-icon svg {
  width: 48px;
  height: 48px;
}

.contact-container h2 {
  margin-bottom: 1.5rem;
}

.contact-container p {
  margin-bottom: 3rem;
}

.btn-contact {
  padding: 16px 40px;
  font-size: 0.8125rem;
  gap: 16px;
}

.btn-contact svg {
  transition: transform var(--transition-fast);
}

.btn-contact:hover svg {
  transform: translateX(6px);
}

.contact-response-note {
  margin-top: 2rem;
  color: var(--color-outline);
}

/* ==========================================================================
   12. Footer
   ========================================================================== */
.footer {
  background-color: var(--color-primary); /* Academic Deep Cypress Green */
  border-top: 1px solid var(--color-subtle-divider);
  padding: 2.5rem 0;
  color: rgba(255, 255, 255, 0.8);
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

@media (min-width: 768px) {
  .footer-container {
    flex-direction: row;
    gap: 0;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  height: 24px;
  width: 24px;
  object-fit: contain;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
}

.footer-links {
  display: flex;
  gap: var(--spacing-gutter);
}

.footer-link {
  font-size: 0.75rem; /* label-caps style */
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #FFFFFF;
}

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

@media (min-width: 768px) {
  .footer-copyright {
    text-align: right;
  }
}

.footer-copyright p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-tagline {
  font-size: 0.625rem; /* 10px */
  color: var(--color-accent-ochre);
  margin-top: 4px;
}

/* ==========================================================================
   13. Interactive Lightbox Component (Vanilla JavaScript driven)
   ========================================================================== */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(26, 26, 27, 0.98); /* dark ink-charcoal overlay */
  z-index: 1000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: var(--color-on-primary);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
}

.lightbox-close:hover {
  opacity: 0.7;
}

.lightbox-close svg {
  width: 32px;
  height: 32px;
}

.lightbox-content-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 90%;
  max-height: 80%;
  gap: 16px;
}

.lightbox-img-wrapper {
  position: relative;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.lightbox-details {
  text-align: center;
  color: var(--color-on-primary);
  max-width: 600px;
}

.lightbox-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-on-primary);
  margin-bottom: 8px;
}

.lightbox-desc {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
}

.lightbox-meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.lightbox-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.lightbox-btn {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-on-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  font-size: 0.6875rem; /* smaller label-caps size */
}

.lightbox-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-on-primary);
  cursor: pointer;
  padding: 16px;
  opacity: 0.6;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav:hover {
  opacity: 1;
}

.lightbox-prev {
  left: 24px;
}

.lightbox-prev:hover {
  transform: translateY(-50%) translateX(-4px);
}

.lightbox-next {
  right: 24px;
}

.lightbox-next:hover {
  transform: translateY(-50%) translateX(4px);
}

.lightbox-nav svg {
  width: 36px;
  height: 36px;
}

/* ==========================================================================
   14. Animations & Reveal Effects
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.active {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for children */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ==========================================================================
   15. Publications Section Styles
   ========================================================================== */
.publications-section {
  background-color: var(--color-surface-paper);
  border-top: 1px solid var(--color-outline-variant);
  border-bottom: 1px solid var(--color-outline-variant);
}

.publication-card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
  margin-bottom: 2rem;
}

.publication-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-outline-variant);
  padding-bottom: 24px;
}

.publication-header .label-caps {
  color: var(--color-accent-ochre);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
}

.publication-header h3 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  line-height: 1.25;
  color: var(--color-primary);
}

.publication-subtitle {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--color-on-surface-variant);
  font-style: italic;
  margin-top: 4px;
}

.publication-authors {
  margin-bottom: 24px;
}

.publication-authors .label-caps {
  color: var(--color-on-surface);
  font-size: 0.6875rem;
  margin-bottom: 8px;
}

.publication-authors-list {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--color-on-surface);
  font-weight: 500;
}

.publication-affiliations {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  margin-top: 4px;
}

.publication-abstract {
  margin-bottom: 32px;
}

.publication-abstract .label-caps {
  color: var(--color-on-surface);
  font-size: 0.6875rem;
  margin-bottom: 12px;
}

.publication-abstract p {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  color: var(--color-on-surface-variant);
}

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

.publication-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--color-outline-variant);
  padding-top: 24px;
}

.publication-credit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-on-surface-variant);
}

/* ==========================================================================
   16. Technical Specifications Section Styles
   ========================================================================== */
.specs-section {
  background-color: var(--color-surface);
}

.specs-intro-header {
  text-align: center;
  margin-bottom: 4rem;
}

.specs-intro-header .label-caps {
  color: var(--color-accent-sage);
  display: block;
  margin-bottom: 12px;
}

.specs-intro-header .display-lg {
  margin-bottom: 16px;
}

.specs-intro-header p {
  max-width: 650px;
  margin: 16px auto 0 auto;
  line-height: 1.6;
}

.specs-intro-header .divider {
  background-color: var(--color-accent-sage);
  width: 80px;
  height: 2px;
  margin: 24px auto 0 auto;
}

.specs-intro-box {
  background: var(--color-surface-container-low);
  border: 1px solid var(--color-outline-variant);
  padding: 32px;
  border-radius: var(--radius-lg);
  margin-bottom: 3rem;
}

.specs-intro-box h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.specs-intro-box p {
  line-height: 1.6;
}

.specs-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.spec-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  border-bottom: 1px solid var(--color-outline-variant);
  padding-bottom: 24px;
}

.spec-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

@media (min-width: 768px) {
  .spec-row {
    grid-template-columns: 240px 1fr;
    gap: 32px;
  }
}

.spec-row .label-caps {
  font-size: 0.8125rem;
  color: var(--color-primary);
}

.spec-row .body-md {
  color: var(--color-on-surface);
  line-height: 1.6;
}

/* ==========================================================================
   17. Investor Info Section Styles
   ========================================================================== */
.investor-section {
  background-color: var(--color-surface-container-low);
  border-top: 1px solid var(--color-outline-variant);
  border-bottom: 1px solid var(--color-outline-variant);
}

.investor-card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.investor-card h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.investor-card p {
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.investor-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .investor-columns {
    grid-template-columns: 1fr 1fr;
  }
}

.investor-column {
  border-left: 2px solid var(--color-accent-terracotta);
  padding-left: 16px;
}

.investor-column.accent-sage {
  border-left-color: var(--color-accent-sage);
}

.investor-column h4 {
  font-size: 0.6875rem;
  color: var(--color-on-surface);
  margin-bottom: 4px;
}

.investor-column p {
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--color-on-surface-variant);
  margin-bottom: 0;
}