/* ========================================
   Site Header & Navigation
   ======================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: transparent;
  transition: background-color var(--transition-normal);
}

.site-header.is-scrolled {
  background-color: var(--color-bg);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 72rem;
  margin-inline: auto;
  padding: var(--space-md) var(--space-lg);
  gap: var(--space-md);
}

.site-logo {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.site-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: none;
  gap: var(--space-lg);
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.lang-toggle,
.contrast-toggle {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border-strong);
  border-radius: 100px;
  color: var(--color-text-secondary);
  background: transparent;
  transition: all var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lang-toggle:hover,
.contrast-toggle:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-primary);
}

/* Mobile menu toggle */
.nav-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border: none;
  background: transparent;
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

.nav-menu-toggle:hover {
  color: var(--color-accent);
}

.nav-menu-toggle .icon-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  margin: 3px 0;
}

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

  .nav-menu-toggle {
    display: none;
  }
}

.nav-links.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  background-color: var(--color-surface);
  padding: var(--space-3xl) var(--space-lg) var(--space-lg);
  gap: var(--space-lg);
  z-index: 200;
}

.nav-links.is-open a {
  font-size: var(--text-xl);
  color: var(--color-text-primary);
}

/* ========================================
   Hero Section — overlapping title
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-bg);
  padding-block-start: 5rem;
}

.hero-artwork {
  position: absolute;
  top: 50%;
  right: 0;
  width: 60%;
  transform: translateY(-50%);
}

.hero-img {
  width: 100%;
  height: auto;
  object-fit: contain;
  box-shadow: 0 0 80px rgba(201, 168, 76, 0.15);
}

.hero-overlay {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl) var(--space-lg);
  max-width: 72rem;
  margin-inline: auto;
  width: 100%;
}

.hero-title {
  color: var(--color-text-primary);
  font-size: var(--text-3xl);
  font-weight: 700;
  max-width: 50%;
  margin-block-end: var(--space-md);
}

.hero-subtitle {
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-style: italic;
  max-width: 36rem;
}

/* Mobile hero: stacked */
@media (max-width: 767px) {
  .hero {
    flex-direction: column;
    min-height: auto;
    padding-block: 6rem var(--space-xl);
  }

  .hero-artwork {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    transform: none;
    margin-block-end: var(--space-lg);
  }

  .hero-title {
    max-width: 100%;
  }
}

/* ========================================
   Narrative Section — dark bands
   ======================================== */

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

.narrative-artwork img {
  border-radius: 0;
  display: inline-block;
  box-shadow: 0 0 60px rgba(201, 168, 76, 0.1);
}

.artwork-credit {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-gold);
  margin-block-start: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.narrative-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.narrative-step {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.narrative-step:last-child {
  border-bottom: none;
}

.step-label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-block-end: var(--space-sm);
}

.museum-label {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  background-color: transparent;
  border-radius: 0;
}

.enriched-description {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  padding-inline-start: var(--space-md);
  border-inline-start: 3px solid var(--color-accent);
}

/* ========================================
   Accessibility Gap — Dark Gallery Wall
   ======================================== */

.gap-section {
  text-align: center;
  padding-block: var(--space-3xl);
}

.gap-gallery-wall {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
  max-width: 480px;
  margin-inline: auto;
  margin-block-end: var(--space-xl);
}

.gap-frame {
  display: block;
  aspect-ratio: 3 / 4;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.gap-frame--lit {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(230, 59, 46, 0.4), 0 0 60px rgba(230, 59, 46, 0.15);
}

.gap-caption {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: var(--leading-normal);
  max-width: 28rem;
  margin-inline: auto;
}

.gap-highlight {
  color: var(--color-accent);
}

.gap-source {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-block-start: var(--space-md);
}

/* ========================================
   Demo — side by side, no toggle
   ======================================== */

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

.demo-intro {
  max-width: 40rem;
  margin-inline: auto;
  margin-block-end: var(--space-xl);
  color: var(--color-text-secondary);
}

.toggle-control {
  display: none;
}

.demo-card {
  max-width: 64rem;
  margin-inline: auto;
  text-align: start;
}

.demo-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.demo-card-image {
  display: none;
}

.demo-card-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

/* Both panels always visible */
.demo-before,
.demo-after {
  padding: var(--space-lg);
  border-radius: 0;
}

.demo-before {
  background-color: var(--color-bg-alt);
  opacity: 0.7;
}

.demo-after {
  background-color: var(--color-surface);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.demo-before.is-hidden,
.demo-after.is-hidden {
  /* Override: always visible in Design 3 */
  opacity: 0.7;
  visibility: visible;
  position: static;
  pointer-events: auto;
}

.demo-before .museum-label {
  margin-block-start: var(--space-sm);
  border-color: var(--color-border);
}

.demo-after .enriched-description {
  margin-block-start: var(--space-sm);
}

.demo-artwork-credit {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-gold);
  margin-block-start: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Duplicate painting thumbnails in each card */
.demo-before-img {
  width: 100%;
  filter: saturate(0.3);
  margin-block-end: var(--space-md);
}

.demo-after-img {
  width: 100%;
  margin-block-end: var(--space-md);
}

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

/* ========================================
   Value Cards (For Institutions) — full-width bands
   ======================================== */

.institutions-intro {
  max-width: 40rem;
  color: var(--color-text-secondary);
  margin-block-end: var(--space-xl);
}

.value-cards {
  margin-block-end: var(--space-xl);
}

.value-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  align-items: start;
}

.value-card:last-child {
  border-bottom: 1px solid var(--color-border);
}

.value-number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.value-card h3 {
  font-size: var(--text-lg);
  margin-block-end: var(--space-sm);
}

.value-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

/* CTA Button */
.cta-button {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: 700;
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-accent);
  color: var(--color-text-primary);
  border-radius: 0;
  text-decoration: none;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.cta-button:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-text-primary);
  transform: scale(1.02);
}

/* ========================================
   Team Section — dramatic panels
   ======================================== */

.team-grid {
  max-width: 72rem;
  margin-inline: auto;
  gap: 0;
}

.team-member {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  min-height: 50vh;
  align-items: center;
  text-align: start;
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.team-member:last-child {
  border-bottom: none;
}

.team-photo {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 0;
  background-color: var(--color-bg-alt);
}

.team-member h3 {
  font-size: var(--text-xl);
  margin-block-end: var(--space-xs);
}

.team-role {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-gold);
  font-weight: 500;
  margin-block-end: var(--space-sm);
}

.team-bio {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  max-width: 36rem;
}

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

/* ========================================
   New Content Elements
   ======================================== */

.narrative-lede {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-block-end: var(--space-lg);
}

.prado-admission {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-style: italic;
  color: var(--color-text-secondary);
  margin-block-start: var(--space-sm);
  padding-inline-start: var(--space-md);
  border-inline-start: 2px solid var(--color-border);
}

.institutions-complement {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 48rem;
  margin-block-end: var(--space-xl);
  line-height: var(--leading-normal);
}

/* ========================================
   Contact Section
   ======================================== */

.contact {
  text-align: center;
  padding-block: var(--space-3xl);
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-gold);
  border-bottom: 1px solid var(--color-gold);
}

.contact p {
  max-width: 32rem;
  margin-inline: auto;
  color: var(--color-text-secondary);
  margin-block-end: var(--space-lg);
}

.contact-lead {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-style: italic;
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  max-width: 40rem;
  margin-inline: auto;
  margin-block-end: var(--space-lg);
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  padding-block: var(--space-xl);
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.site-footer h3 {
  color: var(--color-text-primary);
  font-size: var(--text-base);
  margin-block-end: var(--space-sm);
}

.site-footer p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.footer-accessibility {
  border-inline-start: 2px solid var(--color-accent);
  padding-inline-start: var(--space-md);
}

.footer-legal p:last-child {
  color: var(--color-gold);
}

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