:root {
  --bg-color: #fdfcf9;
  --text-primary: #292826;
  --text-secondary: #6e6b66;
  --accent-earth: #b39371;
  --accent-sage: #758273;
  --surface-color: #ffffff;
  --border-color: #ebe7df;
  
  --font-serif: 'Castoro', 'Georgia', serif;
  --font-sans: 'Inter', 'Noto Sans', -apple-system, sans-serif;
  
  --transition-smooth: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem; /* Account for sticky navbar height */
}

* { box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

/* Typography */
h1, h2, h3, h4, .serif {
  font-family: var(--font-serif);
  font-weight: 400;
}

.title.is-1 { font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.1; letter-spacing: -0.03em; color: var(--text-primary); margin-bottom: 1.5rem; }
.title.is-2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 1.5rem; }
.title.is-3 { font-size: 1.75rem; font-weight: 400; margin-bottom: 1rem; }
.subtitle { font-size: 1.125rem; color: var(--text-secondary); font-weight: 300; }

/* Navigation */
.navbar {
  background: rgba(253, 252, 249, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 4vw;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand .icon {
  font-size: 1.5rem;
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.navbar-brand:hover .icon {
  color: var(--accent-earth);
  transform: scale(1.05);
}

.navbar-menu { display: flex; gap: 2.5rem; }
.navbar-item {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  font-weight: 500;
}
.navbar-item:hover { color: var(--accent-earth); }

/* Layout & Sections */
.section { padding: 8vw 4vw; }
.container { max-width: 1100px; margin: 0 auto; }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  z-index: 2;
  position: relative;
}

.hero-logo {
  height: 42px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 1s forwards 0.2s;
}

.hero h1 {
  opacity: 0;
  animation: fadeUp 1s forwards 0.4s;
}

.hero .subtitle {
  max-width: 540px;
  opacity: 0;
  animation: fadeUp 1s forwards 0.6s;
}

/* Abstract Shape Background */
.hero-shape {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, rgba(179, 147, 113, 0.12) 0%, rgba(253, 252, 249, 0) 70%);
  border-radius: 50%;
  z-index: 0;
}

/* About / Editorial */
.editorial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6vw;
  align-items: center;
}

.editorial-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  line-height: 1.7;
}

.editorial-image-placeholder {
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--surface-color) 100%);
  border-radius: 4px;
  position: relative;
}

.editorial-image-placeholder::after {
  content: '';
  position: absolute;
  top: 15px; right: -15px; bottom: -15px; left: 15px;
  border: 1px solid var(--accent-sage);
  z-index: -1;
}

/* Research Cards */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 3rem;
  margin-top: 4rem;
}

.research-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 3rem 2.5rem;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
  border-radius: 6px;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent-earth);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.research-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.03);
}

.research-card:hover::before { transform: scaleX(1); }

.research-card .tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-sage);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.research-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.research-card p {
  color: var(--text-secondary);
  flex-grow: 1;
  font-size: 1rem;
  line-height: 1.5;
}

.card-arrow {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: var(--transition-smooth);
}

.research-card:hover .card-arrow { gap: 1.25rem; color: var(--accent-earth); }

/* Paper Page */
.paper-hero {
  padding: clamp(80px, 15vw, 12vw) 6vw 6vw;
  text-align: center;
  max-width: 1000px;
  margin: 0 auto;
}

.paper-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3rem;
  margin-top: 4rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 2.5rem 0;
}

.meta-item { display: flex; flex-direction: column; gap: 0.6rem; min-width: 150px; }
.meta-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent-earth); font-weight: 600; }
.meta-value { font-size: 1.1rem; color: var(--text-primary); }

.paper-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 4vw 4vw 8vw;
}

.paper-content .lead {
  font-size: 1.5rem;
  font-family: var(--font-serif);
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 3.5rem;
}

.paper-content p {
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  color: var(--text-secondary);
}

.action-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 3.5rem;
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
  padding: 1rem 2.5rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-primary { background: var(--text-primary); color: var(--surface-color); }
.btn-primary:hover { background: var(--accent-earth); transform: translateY(-3px); box-shadow: 0 10px 20px rgba(179, 147, 113, 0.25); }

.btn-secondary { border: 1px solid var(--border-color); color: var(--text-primary); }
.btn-secondary:hover { border-color: var(--text-primary); background: var(--surface-color); transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.04); }

/* Footer */
.footer {
  padding: 4vw 4vw;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo-container {
  display: flex;
  gap: 2.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.footer-logo { height: 26px; opacity: 0.6; filter: grayscale(100%); transition: var(--transition-smooth); }
.footer-logo:hover { opacity: 1; filter: grayscale(0%); }

/* BibTeX Copy Button */
.bibtex-container {
  position: relative;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 8px;
  overflow-x: auto;
}

.copy-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--border-color);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.copy-button:hover {
  background: var(--accent-earth);
  color: white;
}

.copy-button.copied {
  background: var(--accent-sage);
  color: white;
}

/* Paper Page Refinements */
.paper-title-small {
  font-size: clamp(1.75rem, 6vw, 3rem) !important;
  margin-bottom: 2rem !important;
}

.abstract-small {
  font-size: clamp(1rem, 2.5vw, 1.1rem) !important;
  line-height: 1.7 !important;
  color: var(--text-primary) !important;
}

.hero-links-container {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin-top: 4rem;
  opacity: 0;
  animation: fadeUp 1s forwards 0.8s;
  flex-wrap: wrap;
}

.hero-links-container.is-centered {
  justify-content: center;
}

.hero-affiliations {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.hero-affiliation-logo {
  height: 29px;
  opacity: 0.5;
  filter: grayscale(100%);
  transition: var(--transition-smooth);
}

.hero-affiliation-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
  transform: translateY(-2px);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Project Specific Layouts */
.project-hero {
  padding: 10vw 4vw 6vw;
  max-width: 1000px;
  margin: 0 auto;
}

.status-badge {
  display: inline-block;
  padding: 0.4rem 1.2rem;
  background: var(--accent-sage);
  color: white;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
}

.status-badge.completed { background: var(--accent-earth); }

/* Objective Grid */
.objective-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin: 4rem 0;
}

.objective-card {
  background: var(--surface-color);
  padding: 2.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.objective-card:hover { transform: translateY(-5px); border-color: var(--accent-earth); }
.objective-card .icon { font-size: 1.5rem; color: var(--accent-earth); margin-bottom: 1.5rem; }
.objective-card h4 { font-size: 1.25rem; margin-bottom: 1rem; }

/* Publication List */
.publication-list {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

.publication-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.publication-item:last-child { border-bottom: none; }
.publication-info h5 { font-size: 1.1rem; margin-bottom: 0.4rem; color: var(--text-primary); }
.publication-info .venue { font-size: 0.85rem; color: var(--accent-sage); font-weight: 600; text-transform: uppercase; }

/* Team Grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.team-member { text-align: center; }
.team-member img { 
  width: 120px; 
  height: 120px; 
  border-radius: 50%; 
  object-fit: cover; 
  margin-bottom: 1.5rem; 
  transition: var(--transition-smooth);
  border: 1px solid var(--border-color);
}

.team-member:hover img { transform: scale(1.05); border-color: var(--accent-earth); }
.team-member h5 { font-size: 1rem; margin-bottom: 0.2rem; }
.team-member p { font-size: 0.85rem; color: var(--text-secondary); }

/* Narrative Layout Specifics */
.narrative-container { max-width: 960px; margin: 0 auto; line-height: 1.8; }
.narrative-section { margin-bottom: 6rem; }
.narrative-section h2 { font-size: 2.25rem; margin-bottom: 2.5rem; text-align: center; }
.narrative-pullquote {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-style: italic;
  color: var(--accent-earth);
  border-left: 4px solid var(--accent-earth);
  padding-left: 2rem;
  margin: 4rem 0;
}

/* Visual Layout Specifics */
.visual-banner {
  width: 100%;
  height: 60vh;
  background-size: cover;
  background-position: center;
  border-radius: 6px;
  margin-bottom: 4rem;
  position: relative;
}

.visual-banner-caption {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  background: rgba(253, 252, 249, 0.9);
  padding: 1rem 1.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Media Queries */
@media (max-width: 600px) {
  .bibtex-container {
    padding: 1.25rem;
  }
  #bibtex-code {
    font-size: 0.75rem !important;
  }
  .copy-button {
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.3rem 0.6rem;
    font-size: 0.65rem;
  }
}

@media (max-width: 768px) {
  .hero-affiliations {
    justify-content: center;
    gap: 1.5rem;
    padding: 0;
    border: none;
  }
  .hero-affiliation-logo {
    height: 22px;
  }
  .hero-links-container {
    justify-content: center;
  }
  .editorial-grid { grid-template-columns: 1fr; gap: 10vw; }
  .title.is-1 { font-size: 2.25rem; }
  .hero-logo { height: 36px; }
  .navbar-menu { display: none; }
  .paper-meta { flex-direction: column; gap: 1.5rem; align-items: center; text-align: center; }
  .action-buttons { flex-direction: column; width: 100%; gap: 1rem; }
  .btn-primary, .btn-secondary { width: 100%; text-align: center; }
  .footer { flex-direction: column; gap: 2rem; text-align: center; }
  .footer-logo-container { justify-content: center; gap: 1.5rem; }
}

@media (max-width: 600px) {
  .publication-item {
    flex-direction: column;
    gap: 1rem;
  }
  .publication-item .btn-secondary {
    align-self: flex-start;
  }
}

@media (max-width: 480px) {
  .research-grid { grid-template-columns: 1fr; }
  .section { padding: 15vw 6vw; }
}