:root {
  /* Color Palette - Ewha Green Theme */
  --bg-color: #f8faf9;
  --surface-color: #ffffff;
  --surface-hover: #f0f7f4;
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --accent-color: #00462A; /* Ewha Green - RGB(0, 70, 42) */
  --accent-light: #10B981; /* Bright Emerald Green for gradient */
  --accent-glow: rgba(0, 70, 42, 0.25);
  --border-color: #e4e7e6;

  /* Typography */
  --font-sans: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Spacing */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-long: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Animation Utilities */
.hero-content,
.person-card,
.research-card,
.pub-item,
.course-item,
.gallery-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-long), transform var(--transition-long);
}

.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.person-card:nth-child(2) { transition-delay: 0.1s; }
.person-card:nth-child(3) { transition-delay: 0.2s; }
.person-card:nth-child(4) { transition-delay: 0.3s; }

.research-card:nth-child(2) { transition-delay: 0.1s; }
.research-card:nth-child(3) { transition-delay: 0.2s; }

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#main-content {
  flex: 1;
  padding-top: 100px; /* Header height + spacing */
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

/* Header & Nav */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem var(--spacing-md);
}

.logo a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-image {
  height: 40px;
  width: auto;
  display: block;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, var(--accent-color), var(--accent-light));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links li {
  position: relative;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
  display: block;
  padding: 0.5rem 0;
}

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

.nav-links > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: var(--transition-smooth);
}

.nav-links > li > a:hover::after {
  width: 100%;
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem 0;
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 1000;
}

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

.dropdown-menu li {
  list-style: none;
}

.dropdown-menu a {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  white-space: nowrap;
  color: var(--text-secondary);
}

.dropdown-menu a:hover {
  background: var(--surface-hover);
  color: var(--accent-color);
}

.dropdown-menu a::after {
  display: none;
}

/* Logo Responsive */
@media (max-width: 900px) {
  .logo-text {
    font-size: 1.2rem;
  }
}

@media (max-width: 600px) {
  .logo-text {
    font-size: 1rem;
  }
  
  .logo-image {
    height: 32px;
  }
  
  .logo a {
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none; /* Hide text, show only symbol on very small screens */
  }
}

/* Footer */
#main-footer {
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  margin-left: var(--spacing-md);
}

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

/* Hero Section */
.hero-section {
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--spacing-md) 0;
}

.hero-content {
  flex: 1.2;
  z-index: 7; /* Ensure text stays above slider */
}

.hero-title {
  font-family: var(--font-display);
  font-size: 5rem;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  font-weight: 700;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-light) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.outline-text {
  -webkit-text-stroke: 1px var(--text-primary);
  color: transparent;
  transition: var(--transition-smooth);
}

.hero-title:hover .outline-text {
  color: var(--text-primary);
  -webkit-text-stroke: 0;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 800px; /* Increased from 600px to prevent line break */
}

/* Hero Visual (Orbs) - Removed for News Section */
/* .hero-visual { ... } */

/* Hero Visual */
.hero-visual {
  flex: 1.3; /* Increased to overlap left content area */
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  min-height: 500px;
  z-index: 1; /* Below text content */
  margin-left: -15%; /* Pull left to overlap content */
}

.visual-orb {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at 30% 30%, var(--accent-glow), transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
  animation: float 6s ease-in-out infinite;
  opacity: 0.6;
}

/* Home Visual Slider */
.visual-slider {
  position: relative;
  width: 100%;
  height: 500px;
  background-size: cover;
  background-position: center;
  border-radius: 10px; /* Rectangle shape - no rounded corners */
  transition: all 0.8s ease-in-out;
  /* Gradient Mask: fade only on left side */
  mask-image: linear-gradient(to right, 
    transparent 0%, 
    rgba(0,0,0,0.4) 20%, 
    black 35%);
  -webkit-mask-image: linear-gradient(to right, 
    transparent 0%, 
    rgba(0,0,0,0.4) 20%, 
    black 35%);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.project-card-grid {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition-fast);
}

.project-card-grid:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.project-grid-image {
  width: 100%;
  height: 180px;
  background: #f1f5f9;
}

.project-grid-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-grid-info {
  padding: var(--spacing-md);
}

.project-grid-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.project-grid-agency {
  font-size: 0.9rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* Project Detail View */
.project-detail {
  animation: fadeIn 0.3s ease;
}

.back-btn {
  background: transparent;
  border: none;
  color: var(--accent-color);
  font-weight: 600;
  cursor: pointer;
  margin-bottom: var(--spacing-lg);
  font-size: 1rem;
  padding: 0;
}

.back-btn:hover {
  text-decoration: underline;
}

.detail-content {
  max-width: 900px;
  margin: 0 auto;
}

.detail-header {
  margin-bottom: var(--spacing-lg);
}

.detail-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.detail-meta {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.detail-sponsor {
  color: var(--accent-color);
  font-weight: 600;
}

.detail-period {
  color: var(--text-secondary);
}

.status-active {
  color: var(--success-color);
  font-weight: 600;
}

.status-completed {
  color: var(--text-secondary);
}

.detail-image-wrapper {
  width: 100%;
  max-height: 450px;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.detail-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

.detail-section {
  margin-bottom: var(--spacing-xl);
}

.detail-section-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-light);
}

.detail-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.detail-list {
  list-style: none;
  padding-left: 0;
}

.detail-list li {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
  padding-left: 1.5rem;
  position: relative;
}

.detail-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

.detail-tech-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  list-style: none;
  padding-left: 0;
}

.detail-tech-list li {
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
}

.detail-team-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.detail-team-list li {
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  background: var(--accent-light);
  border-radius: 20px;
  color: var(--text-primary);
  font-weight: 500;
}

/* Compact Publications / Teaching Spacing */
.course-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.semester-spacing {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.course-item.compact {
  display: flex;
  align-items: center;
  background: var(--surface-color);
  padding: 12px 20px; /* Reduced padding */
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: var(--transition-fast);
  gap: var(--spacing-md); /* Added gap between code and info */
}

/* Projects Page */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.project-card {
  background: var(--surface-color);
  padding: var(--spacing-lg);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  transition: var(--transition-fast);
}

.project-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.project-title {
  font-size: 1.4rem;
  margin: 0;
  color: var(--text-primary);
}

.project-status {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
}

/* Detailed View (Default) */
.view-list .pub-item {
  display: flex;
  gap: var(--spacing-lg);
  background: var(--surface-color);
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-bottom: var(--spacing-sm);
}

.view-list .pub-id {
  flex: 0 0 45px;
  font-weight: 700;
  color: var(--accent-color);
  font-size: 1rem;
  padding-top: 2px;
}

.view-list .pub-image {
  flex: 0 0 140px;
  height: 90px;
  border-radius: 6px;
  overflow: hidden;
}

.view-list .pub-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.view-list .pub-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Compact View - 3-column grid layout */
#publications-container.view-compact .pub-item {
  display: flex;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  background: transparent;
  border-radius: 0;
  border-top: none;
  border-left: none;
  border-right: none;
  box-shadow: none;
}

#publications-container.view-compact .pub-item:hover {
  background: var(--surface-hover);
  transform: none;
  padding-left: 10px;
}

#publications-container.view-compact .pub-image {
  display: none;
}

#publications-container.view-compact .pub-content {
  display: grid;
  grid-template-columns: 5fr 1fr 1.5fr; /* Column 1 largest (3x), columns 2 and 3 equal */
  gap: var(--spacing-lg);
  width: 100%;
  align-items: center;
}

/* Column 1: Title + Authors group */
#publications-container.view-compact .pub-title-author-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#publications-container.view-compact .pub-title {
  font-size: 1.1rem;
  margin: 0;
  font-weight: 600;
  color: var(--text-primary);
}

#publications-container.view-compact .pub-authors {
  font-size: 0.85rem;
  margin: 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Column 2: Tags */
#publications-container.view-compact .pub-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

/* Column 3: Venue + Badges group */
#publications-container.view-compact .pub-venue-group {
  text-align: right;
}

#publications-container.view-compact .pub-venue {
  font-size: 0.9rem;
  margin: 0;
  color: var(--accent-color);
  font-weight: 600;
  text-align: right;
}

#publications-container.view-compact .pub-links {
  display: none;
}

#publications-container.view-compact .pub-badges {
  justify-content: flex-end;
  margin-top: 3px;
}

.project-status.active {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
}

.project-status.completed {
  background: rgba(100, 116, 139, 0.1);
  color: #64748b;
}

.project-meta {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-lg);
}

.project-desc {
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.project-tags {
  display: flex;
  gap: 8px;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-content {
  background: var(--surface-color);
  width: 90%;
  max-width: 800px;
  border-radius: 24px;
  padding: var(--spacing-xl);
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
  animation: slideUp 0.3s ease;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-body {
  display: flex;
  gap: var(--spacing-xl);
}

.modal-image {
  flex: 0 0 250px;
}

.modal-image img {
  width: 100%;
  border-radius: 16px;
}

.modal-info {
  flex: 1;
}

.modal-info h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.modal-role {
  color: var(--accent-color);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}

.modal-bio {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

/* Alumni Accordion */
.alumni-section {
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-lg);
}

details summary {
  font-size: 1.5rem;
  font-weight: 600;
  cursor: pointer;
  padding: var(--spacing-md);
  background: var(--surface-hover);
  border-radius: 12px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

details summary::after {
  content: '+';
  font-size: 1.5rem;
}

details[open] summary::after {
  content: '-';
}

.alumni-grid {
  margin-top: var(--spacing-lg);
}

.alumni-card .person-image {
  display: none; /* Hide image for alumni in grid if desired, or keep it */
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* News Section (Below Hero) */
.news-section {
  padding: var(--spacing-md) var(--spacing-md);
  background: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
}

.news-container {
  max-width: 1000px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  text-align: center;
}

.news-list-vertical {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-color);
}

.news-row {
  display: flex;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.2s;
}

.news-row:hover {
  background: var(--surface-hover);
  padding-left: var(--spacing-sm);
}

.news-date {
  flex: 0 0 120px;
  font-size: 0.9rem;
  color: var(--accent-color);
  font-weight: 600;
}

.news-content {
  flex: 1;
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* Home Highlights Section - Balanced Two-Column Layout */
.home-highlights {
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--bg-color);
}

.highlights-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.highlight-section {
  background: var(--surface-color);
  padding: var(--spacing-lg);
  border-radius: 16px;
  border: 1px solid var(--border-color);
}

.section-title-compact {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

/* Compact News */
.news-list-compact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.news-row-compact {
  display: flex;
  align-items: flex-start;
  padding: var(--spacing-sm);
  border-radius: 8px;
  transition: background 0.2s;
}

.news-row-compact:hover {
  background: var(--surface-hover);
}

.news-date-compact {
  flex: 0 0 90px;
  font-size: 0.85rem;
  color: var(--accent-color);
  font-weight: 600;
  padding-top: 2px;
}

.news-content-compact {
  flex: 1;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin: 0;
}

/* Compact Projects Grid */
.projects-grid-compact {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.project-card-compact {
  display: flex;
  background: var(--bg-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-fast);
  border: 1px solid var(--border-color);
  text-decoration: none;
  color: inherit;
}

.project-card-compact:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.project-card-image-compact {
  flex: 0 0 100px;
  height: 100px;
  background: var(--surface-hover);
}

.project-card-image-compact img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card-info-compact {
  flex: 1;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-card-title-compact {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-sm) 0;
}

.project-card-sponsor-compact {
  font-size: 0.85rem;
  color: var(--accent-color);
  font-weight: 500;
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .highlights-container {
    grid-template-columns: 1fr;
  }
}

/* Page General */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm); /* Reduced from lg to sm */
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-sm);
}

.page-title {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 0;
  border-bottom: none;
  padding-bottom: 1rem;
}

/* Language Toggle Button */
.lang-toggle-btn {
  padding: 0.4rem 0.9rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.pub-header-title {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 0;
  border-bottom: none;
  padding-bottom: 0;
}
/* Publication Category Tabs */
.pub-category-tabs {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0;
}

.tab-link {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-fast);
}

.tab-link:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.tab-link.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  font-weight: 600;
}

/* View Toggle */
.view-toggle {
  display: flex;
  background: var(--surface-hover);
  padding: 4px;
  border-radius: 8px;
}

.toggle-btn {
  background: transparent;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.toggle-btn.active {
  background: var(--surface-color);
  color: var(--text-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* People Groups */
.people-groups {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* People Grid */
.people-grid {
  display: grid;
  /* Adjusted to fit max 4 items (approx 280px-300px each on large screens) */
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); /* Even smaller min-width */
  gap: var(--spacing-lg);
}

.person-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  width: 100%;
  position: relative; /* For positioning More button */
}

.person-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

/* More button in top-right corner */
.person-more-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.person-more-btn:hover {
  background: var(--accent-color);
  color: white;
  transform: scale(1.1);
}

.person-more-btn svg {
  width: 20px;
  height: 20px;
}

.person-image {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: #f1f5f9;
  overflow: hidden;
}

.person-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.3s ease;
}

.person-card:hover .person-image img {
  transform: scale(1.05);
}

.person-info {
  padding: var(--spacing-md); /* Increased padding for more left margin */
}

.person-bio {
  display: none;
}

.person-email {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  margin-bottom: 0;
}

.member-social {
  display: flex;
  gap: var(--spacing-md); /* Increased gap between icons */
  margin-top: var(--spacing-md); /* More space from role */
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border-color);
}

.member-social a {
  font-size: 1.5rem;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.member-social a img {
  width: 25px;
  height: 25px;
  object-fit: contain;
  transition: var(--transition-fast);
}

.member-social a:hover {
  transform: scale(1.15);
}

.member-social a:hover img {
  filter: brightness(1.1);
}
/* ===== Research Areas - Card Grid ===== */
.ra-page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2.5rem;
}

.ra-page-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0.25rem 0 0 0;
  font-style: italic;
}

.ra-lang-toggle {
  display: flex;
  gap: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  height: fit-content;
}

.ra-lang-toggle .lang-btn {
  padding: 6px 16px;
  border: none;
  background: var(--surface-color);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ra-lang-toggle .lang-btn.active {
  background: var(--accent-color);
  color: #fff;
  font-weight: 600;
}

.ra-lang-toggle .lang-btn:hover:not(.active) {
  background: var(--surface-hover);
}

.ra-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.ra-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ra-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.08);
  border-color: var(--accent-light);
}

.ra-icon {
  font-size: 2.5rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.ra-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

.ra-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

.ra-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 0.5rem;
}

.ra-keyword {
  font-size: 0.7rem;
  background: var(--bg-color);
  color: var(--text-secondary);
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.ra-keyword:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

@media (max-width: 768px) {
  .ra-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .ra-grid {
    grid-template-columns: 1fr;
  }
}

/* Legacy - hide old research styles */
.research-feature { display: none; }
.research-list { display: none; }

/* Publications List */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.publications-list.grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.pub-item {
  display: flex;
  gap: var(--spacing-md);
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: var(--spacing-md);
  border-radius: 12px;
  transition: var(--transition-fast);
  align-items: center;
}

.publications-list.grid-view .pub-item {
  flex-direction: column;
  align-items: flex-start;
}

.pub-item:hover {
  border-color: var(--accent-color);
  background: var(--surface-hover);
}

.pub-image {
  width: 100px;
  height: 100px;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
}

.publications-list.grid-view .pub-image {
  width: 100%;
  height: 180px;
}

.pub-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pub-content {
  flex: 1;
  width: 100%;
}

.pub-title {
  font-family: var(--font-display), system-ui, -apple-system, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.pub-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.pub-title a:hover {
  color: var(--accent-color);
  text-decoration: underline;
}

.pub-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--surface-hover);
  color: var(--accent-color);
  font-weight: 600;
  border: 1px solid var(--border-color);
}

.pub-authors {
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

/* Author Notation Legend */
.pub-author-legend {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.pub-author-legend .legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.pub-author-legend .legend-symbol {
  font-weight: 700;
  color: var(--accent-color);
  font-size: 1rem;
}

.pub-author-legend .legend-divider {
  color: var(--border-color);
  margin: 0 0.25rem;
  font-size: 0.85rem;
}

.pub-author-legend .legend-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
}

.pub-venue {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-style: italic;
}

/* Publication badges (SCIE, SSCI, 우수, 최우수 etc.) */
.pub-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.pub-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Bold author highlighting */
.pub-authors strong {
  font-weight: 700;
  color: var(--text-primary);
  font-style: normal;
}

/* Teaching List */
.teaching-list {
  display: grid;
  gap: var(--spacing-md);
}

.course-item {
  background: var(--surface-color);
  border-left: 4px solid var(--accent-color);
  padding: var(--spacing-md);
  border-radius: 0 12px 12px 0;
  transition: var(--transition-fast);
}

.course-item:hover {
  background: var(--surface-hover);
  transform: translateX(5px);
}

.course-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.course-code {
  font-weight: 700;
  color: var(--accent-color);
  min-width: 100px;
  flex-shrink: 0;
  text-align: left;
}

.course-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: var(--spacing-sm);
}

/* Contact Page */
.contact-container {
  display: flex;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  align-items: flex-start; /* Align to top */
}

.contact-info {
  flex: 0 0 350px; /* Fixed width for info */
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Location language toggle */
.location-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.location-header h3 {
  margin: 0;
}

.lang-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.lang-btn {
  padding: 4px 10px;
  font-size: 0.75rem;
  border: none;
  background: var(--surface-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-body);
}

.lang-btn:not(:last-child) {
  border-right: 1px solid var(--border-color);
}

.lang-btn.active {
  background: var(--accent-color);
  color: white;
}

.lang-btn:hover:not(.active) {
  background: var(--surface-hover);
}

/* ... info-item styles ... */

.contact-map {
  flex: 1;
  min-width: 300px;
  height: 600px; /* Taller map */
  background: var(--surface-hover);
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Gallery Groups */
.gallery-groups {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.group-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  border-left: 4px solid var(--accent-color);
  padding-left: var(--spacing-sm);
  margin-top: var(--spacing-md); /* Added top spacing for semester headers */
}

/* Gallery Horizontal Scroll */
.gallery-container {
  width: 100%;
  overflow: hidden;
  padding: var(--spacing-sm) 0 var(--spacing-md) 0;
}

.gallery-scroll {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.gallery-item {
  flex: 0 0 400px;
  height: 300px;
  border-radius: 24px; /* Rounded aesthetics as requested */
  overflow: hidden;
  position: relative;
  scroll-snap-align: center;
  transition: var(--transition-smooth);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: white;
  font-family: var(--font-display);
  transform: translateY(100%);
  transition: var(--transition-smooth);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* People Tabs */
.people-tabs, .publication-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--border-color);
}

.people-tab, .publication-tab {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-fast);
  text-decoration: none;
}

.people-tab:hover, .publication-tab:hover {
  color: var(--text-primary);
}

.people-tab.active, .publication-tab.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

/* Professor Profile */
.professor-profile {
  max-width: 900px;
  margin: 0 auto;
}

.professor-header {
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--surface-color);
  border-radius: 16px;
  border: 1px solid var(--border-color);
}

.professor-photo {
  width: 200px;
  height: 200px;
  border-radius: 16px;
  object-fit: cover;
}

.professor-info h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.professor-title {
  font-size: 1.2rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.professor-dept {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: -0.25rem; /* Reduce top spacing (closer to title) */
  margin-bottom: 0.5rem; /* Significantly reduced bottom spacing */
  font-weight: 500;
}

.professor-details-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr; /* Revert to wider Education column */
  gap: var(--spacing-xl); /* Revert to wider gap to distinguish columns */
  margin-bottom: var(--spacing-md);
  margin-top: 0; /* Keep top margin top 0 to avoid "moved down" look */
}

.detail-section {
  border-left: 3px solid var(--accent-light);
  padding-left: var(--spacing-md);
}

.detail-section.contact-section {
  grid-column: 1 / -1; /* Span full width */
  margin-top: 0.5rem;
  border-left: none;
  background: var(--surface-hover);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
}

.detail-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-color);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.detail-list {
  list-style: none;
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.detail-list li {
  margin-bottom: 0.25rem;
  white-space: nowrap; /* Prevent line breaks */
}

.detail-list strong {
  font-weight: 600;
  color: var(--text-primary);
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem; /* Wider gap for contact items */
  width: 100%;
}

.contact-list li {
  margin-bottom: 0;
  display: flex;
  align-items: center;
}

.contact-list .label {
  font-weight: 600;
  color: var(--text-secondary);
  margin-right: 0.5rem;
}

/* Year Group Spacing for Publications */
.year-group {
  margin-bottom: var(--spacing-xl);
}

.year-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-top: var(--spacing-lg);  /* Medium space above */
  margin-bottom: 0.3rem;  /* Very small space below */
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.year-title:first-child {
  margin-top: 0;  /* No top margin for first year */
}

/* Ampersand Styling for Lab Name */

/* Enhanced Research Page Styles */
.research-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.research-tab {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 16px;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-width: 200px;
}

.research-tab:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 70, 42, 0.1);
}

.research-tab.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

.tab-icon {
  font-size: 2rem;
}

.tab-title {
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  line-height: 1.3;
}

.research-content-item {
  display: none;
  animation: fadeIn 0.4s ease;
}

.research-content-item.active {
  display: block;
}

/* Duplicate .research-feature rule removed - using compact style from lines 1320-1331 */

.feature-header {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-color);
}

.feature-icon-large {
  font-size: 5rem;
  flex-shrink: 0;
}

.feature-titles {
  flex: 1;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.feature-title-ko {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.feature-focus {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.feature-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.feature-section {
  background: var(--surface-hover);
  padding: var(--spacing-lg);
  border-radius: 12px;
}

.feature-section h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-md);
}

.feature-section p {
  line-height: 1.8;
  color: var(--text-primary);
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.keyword-tag {
  background: var(--accent-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
}

.perspective-box {
  background: linear-gradient(135deg, var(--surface-hover) 0%, var(--bg-color) 100%);
  border-left: 4px solid var(--accent-color);
}

.perspective-box p {
  font-weight: 500;
  color: var(--accent-color);
}

/* Simplified Professional Research Page */
.research-tabs-simple {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--border-color);
}

.research-tabs-simple .research-tab {
  background: transparent;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-fast);
}

.research-tabs-simple .research-tab:hover {
  color: var(--accent-color);
}

.research-tabs-simple .research-tab.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.research-detail {
  max-width: 900px;
  margin: 0 auto;
}

.research-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.research-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.subtitle-ko {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.research-section {
  margin-bottom: var(--spacing-lg);
}

.research-section h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent-color);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.research-section p {
  line-height: 1.8;
  color: var(--text-primary);
}

.keyword-list-simple {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-sm);
}

.keyword-list-simple li {
  padding: var(--spacing-sm) 0;
  color: var(--text-primary);
  font-weight: 500;
}

.keyword-list-simple li::before {
  content: "•";
  color: var(--accent-color);
  font-weight: bold;
  margin-right: 0.5rem;
}

.research-section.perspective {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--surface-hover);
  border-left: 3px solid var(--accent-color);
  border-radius: 4px;
}

.research-section.perspective p {
  color: var(--text-primary);
  font-style: italic;
}

/* Article-style Research Page */
.research-tabs-clean {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.research-tabs-clean .research-tab {
  background: transparent;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition-fast);
}

.research-tabs-clean .research-tab:hover {
  color: var(--accent-color);
}

.research-tabs-clean .research-tab.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.research-article {
  max-width: 800px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: var(--spacing-xl);
}

.article-header h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: 700;
}

.article-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: var(--spacing-lg);
}

.lead-paragraph {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--text-primary);
  font-weight: 500;
}

.perspective-text {
  padding: var(--spacing-lg);
  background: var(--surface-hover);
  border-left: 3px solid var(--accent-color);
  font-style: italic;
  color: var(--text-secondary);
}

.perspective-text strong {
  color: var(--accent-color);
  font-style: normal;
}

.keywords-inline {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.keywords-label {
  font-weight: 600;
  color: var(--accent-color);
  margin-right: 0.5rem;
}

/* People Page - Professor Horizontal Layout */
.people-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.people-section {
  margin-bottom: var(--spacing-md);
  padding-top: var(--spacing-lg);
}

.people-section:not(:first-child) {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.people-section.professor-section {
  padding-top: 0;
  border-top: none;
  background: transparent;
  margin-top: -1rem;
}

.section-subtitle.pi-subtitle {
  margin-bottom: 0;
}

.section-subtitle {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  font-weight: 700;
  letter-spacing: 0.03em;
}

/* Professor Horizontal Card */
.professor-card-horizontal {
  display: flex;
  gap: var(--spacing-xl);
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: var(--spacing-lg);
}

.professor-image-large {
  flex: 0 0 180px;
  height: 230px;
  border-radius: 12px;
  overflow: hidden;
}

.professor-image-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.professor-info-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.professor-name-large {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.professor-role-large {
  font-size: 0.95rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.professor-email {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.professor-bio-preview {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* Clickable Person Card */
.person-card.clickable {
  cursor: pointer;
}

.person-card.clickable:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 25px rgba(0, 70, 42, 0.12);
}

/* Responsive */
@media (max-width: 768px) {
  .professor-card-horizontal {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .professor-image-large {
    flex: none;
    width: 180px;
    height: 220px;
  }

  .professor-info-panel {
    align-items: center;
  }

  .professor-info-panel .member-social {
    justify-content: center;
  }
}

/* Professor Card - New Two-Tier Layout */
.professor-card-new {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
}

/* Top Section: Image Left, Basic Info Right */
.professor-top-section {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(0, 70, 42, 0.1);
}

.professor-image-left {
  flex: 0 0 240px;
  height: 300px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 70, 42, 0.12);
}

.professor-image-left img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.professor-basic-details {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.professor-name-main {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
  font-weight: 700;
}

.professor-title-main {
  font-size: 1.05rem;
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.professor-dept-main {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  line-height: 1.5;
}

.professor-contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: var(--spacing-sm) 0;
}

.contact-item {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  font-size: 0.92rem;
}

.contact-item .contact-label {
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 60px;
  flex-shrink: 0;
}

.contact-item .contact-value {
  color: var(--text-primary);
}

.professor-basic-details .member-social {
  margin-top: auto;
}

/* Bottom Sections: Education & Experience */
.professor-bottom-sections {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  padding-top: var(--spacing-md);
}

.academic-section {
  background: transparent;
}

.academic-heading {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(0, 70, 42, 0.15);
}

.academic-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.academic-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.academic-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
  font-size: 1.1rem;
}

.academic-list .degree,
.academic-list .position {
  font-weight: 600;
  color: var(--accent-color);
  margin-right: 0.5rem;
}

/* Responsive */
@media (max-width: 968px) {
  .professor-top-section {
    flex-direction: column;
    align-items: center;
  }

  .professor-image-left {
    flex: none;
    width: 220px;
    height: 280px;
  }

  .professor-basic-details {
    align-items: center;
    text-align: center;
  }

  .professor-contact-info {
    align-items: center;
  }

  .professor-basic-details .member-social {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .professor-card-new {
    border-radius: 16px;
  }

  .professor-top-section,
  .professor-bottom-sections {
    padding: var(--spacing-lg);
  }

  .professor-name-main {
    font-size: 1.7rem;
  }

  .professor-image-left {
    width: 200px;
    height: 260px;
  }
}

/* Gallery Image Modal */
.image-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  animation: fadeIn 0.2s ease;
}

.image-modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.image-modal-content img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
}

.image-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 2.5rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: var(--transition-fast);
}

.image-modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.image-modal-caption {
  margin-top: var(--spacing-md);
  color: white;
  font-size: 1rem;
  text-align: center;
}

.gallery-item {
  cursor: pointer;
  transition: var(--transition-smooth);
}

.gallery-item:hover {
  transform: scale(1.02);
}

/* Home Slider Arrows - Bottom Center */
.slider-arrow {
  position: absolute;
  bottom: 12px; /* Lower position */
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.65);
  font-size: 2.2rem;
  font-weight: 200;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: var(--transition-fast);
  z-index: 10;
  padding: 6px 10px;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.slider-arrow:hover {
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 3px 8px rgba(0, 0, 0, 0.6);
}

.slider-arrow-left {
  left: 50%;
  transform: translateX(calc(-50% - 55px)); /* More spacing */
}

/* No separator needed */
.slider-arrow-left::after {
  display: none;
}

.slider-arrow-right {
  left: 50%;
  transform: translateX(calc(-50% + 55px)); /* More spacing */
}

@media (max-width: 768px) {
  .slider-arrow {
    font-size: 2rem;
    bottom: 15px;
  }
  
  .slider-arrow-left {
    transform: translateX(calc(-50% - 35px));
  }
  
  .slider-arrow-right {
    transform: translateX(calc(-50% + 35px));
  }
  
  .slider-arrow-left::after {
    margin-left: 8px;
    font-size: 1rem;
  }
}

/* ===== Recruitment Banner ===== */
.recruit-banner {
  padding: 1.25rem var(--spacing-md);
  background: linear-gradient(135deg, rgba(0,102,51,0.07) 0%, rgba(0,102,51,0.03) 100%);
  border-bottom: 1px solid var(--border-color);
}

.recruit-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.recruit-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.recruit-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.recruit-desc strong {
  color: var(--accent-color);
  font-weight: 700;
}

.recruit-apply-btn {
  margin-top: 0.35rem;
  padding: 6px 22px;
  background: var(--accent-color);
  color: #fff;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.recruit-apply-btn:hover {
  background: var(--accent-dark, #004d26);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,102,51,0.2);
}

@media (max-width: 600px) {
  .recruit-title {
    font-size: 1rem;
  }
}