/* Reusable component styles - Clean Simple Design */

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: var(--font-weight-medium);
  text-align: center;
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  font-size: var(--font-size-base);
  line-height: 1;
}

.btn--primary {
  background-color: #FBEFF2; /* Pale red tint background */
  color: black; /* Black text for better contrast */
  border: 1px solid #E8919F; /* Slightly deeper red tint border */
}

.btn--primary:hover {
  background: #E8919F; /* Slightly deeper red tint on hover */
  transform: translateY(-2px);
  color: black;
}

.btn--secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: var(--border-width-thick) solid var(--primary-color);
}

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

.btn--large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn--small {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* Cards - Clean and Simple */
.card {
  background: var(--bg-color);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card__header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.card__content {
  padding: var(--spacing-xl);
}

.card__footer {
  padding: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  background: var(--bg-light);
}

/* Publication Card - Clean Design */
.publication-card {
  background: var(--bg-color);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  max-width: 100%; /* Make it full width */
  width: 100%;
}

.publication-card:hover {
  background: #FBEFF2; /* Softer red tint */
  color: black;
  transform: translateX(8px);
}

.publication-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-color);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.publication-card__authors {
  color: var(--text-light);
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

.publication-card:hover .publication-card__authors {
  color: black;
}

.publication-card__venue {
  color: var(--primary-color);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

.publication-card:hover .publication-card__venue {
  color: white;
}

.publication-card__abstract {
  color: var(--text-color);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.publication-card:hover .publication-card__abstract {
  color: white;
}

.publication-card__links {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Research Card - Clean Hover Effect */
.research-card {
  background: var(--bg-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  padding: var(--spacing-xl);
}

.research-card:hover {
  background: #F7E4E8; /* Pale red tint background */
  color: black;
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.research-card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.research-card:hover .research-card__title {
  color: black;
}

.research-card__description {
  color: var(--text-light);
  line-height: var(--line-height-relaxed);
}

.research-card:hover .research-card__description {
  color: black;
}

/* Tags - Simple Design */
.tag {
  display: inline-block;
  background: var(--bg-light);
  color: var(--text-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-xl);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-right: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-normal);
}

.tag:hover {
  background: #FBEFF2; /* Same red tint as team cards */
  color: black;
}

/* Links - Simple and Clean */
.link {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-light);
  color: var(--text-color);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  transition: all var(--transition-normal);
}

.link:hover {
  background: #FBEFF2; /* Same red tint as team cards */
  color: black;
}

/* Section titles - Clean Typography */
.section-title {
  text-align: center;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-3xl);
  color: var(--text-color);
  font-weight: var(--font-weight-semibold);
}

.category-title {
  font-size: var(--font-size-3xl);
  color: var(--text-color);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  font-weight: var(--font-weight-semibold);
}

/* Loading states - Minimal */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--bg-light);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Form Elements - Clean Design */
.form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-normal);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-color);
}

/* Contact Info - Clean Layout */
.contact-details {
  margin-top: var(--spacing-xl);
}

.contact-item {
  margin-bottom: var(--spacing-lg);
}

.contact-item h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
  font-weight: var(--font-weight-semibold);
}

.contact-item p,
.contact-item address {
  color: var(--text-light);
  line-height: var(--line-height-relaxed);
  font-style: normal;
}

.contact-item a {
  color: var(--primary-color);
  text-decoration: none;
}

.contact-item a:hover {
  color: var(--primary-dark);
}

/* Social Links - Simple Icons */
.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-links a {
  font-size: var(--font-size-2xl);
  text-decoration: none;
  transition: transform var(--transition-normal);
}

.social-links a:hover {
  transform: scale(1.2);
}

/* Navigation - Clean Horizontal */
.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
  background: #FBEFF2; /* Same red tint as team cards */
  color: black;
}

/* Responsive Grid Utilities */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid--2-cols {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3-cols {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4-cols {
  grid-template-columns: repeat(4, 1fr);
}

.grid--auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Flexbox utilities */
.flex {
  display: flex;
}

.flex--column {
  flex-direction: column;
}

.flex--center {
  justify-content: center;
  align-items: center;
}

.flex--between {
  justify-content: space-between;
}

.flex--around {
  justify-content: space-around;
}

/* Circular Images - Profile Pictures and Images */
.img-circle {
  border-radius: 50%;
  object-fit: cover;
  aspect-ratio: 1;
}

.img-circle--small {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.img-circle--medium {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}

.img-circle--large {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
}

.img-circle--xl {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
}

/* Avatar container for circular images with border */
.avatar {
  border-radius: 50%;
  overflow: hidden;
  display: inline-block;
  border: 2px solid var(--border-color);
  transition: all var(--transition-normal);
}

.avatar:hover {
  border-color: var(--primary-color);
  transform: scale(1.05);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Person card with circular image - Wide and Short */
.person-card {
  background: var(--bg-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  max-height: 280px;
}

.person-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.person-card__image {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-color);
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.person-card:hover .person-card__image {
  border-color: var(--primary-color);
}

.person-card__content {
  flex: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.person-card__name {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.person-card__title {
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  font-style: italic;
  font-size: var(--font-size-base);
}

.person-card__bio {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  max-height: 60px;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
}

.person-card__links {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.person-card__links a {
  display: inline-block;
  padding: var(--spacing-sm);
  background: var(--bg-light);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.person-card__links a:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.1);
}

/* Publication achievement badges */
.publication-card__achievements {
  margin: var(--spacing-md) 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.achievement-badge {
  display: inline-block;
  background: linear-gradient(135deg, #C41230, #8C0D22);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-xl);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 4px rgba(196, 18, 48, 0.3);
  transition: all var(--transition-normal);
}

.achievement-badge:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(196, 18, 48, 0.4);
}

.publication-card:hover .achievement-badge {
  background: linear-gradient(135deg, #ffffff, #F7F7F7);
  color: var(--primary-color);
  text-shadow: none;
  box-shadow: 0 2px 4px rgba(255, 255, 255, 0.3);
}

/* Publication achievements for publications page */
.publication-achievements {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.publication-achievements .achievement-badge {
  font-size: var(--font-size-xs);
  padding: 4px 8px;
}

/* Intersection Graph for Hero Section */
.intersection-graph {
  position: relative;
  width: 360px;
  height: 360px;
  margin: var(--spacing-2xl) auto;
  z-index: 1;
}

.intersection-circle {
  position: absolute;
  width: 215px;
  height: 215px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  color: white;
  text-align: center;
  opacity: 0.8;
  transition: all var(--transition-normal);
}

.intersection-circle:hover {
  opacity: 1;
  transform: scale(1.05);
}

.intersection-circle.sustainability {
  background: linear-gradient(135deg, #6D6E71, #4A4B4D); /* Iron gray gradient */
  top: 0;
  left: 72px;
  z-index: 2;
}

.intersection-circle.equity {
  background: linear-gradient(135deg, #C41230, #8C0D22); /* Carnegie Red gradient */
  bottom: 0;
  left: 0;
  z-index: 2;
}

.intersection-circle.efficiency {
  background: linear-gradient(135deg, #2B2B2B, #000000); /* Black gradient */
  bottom: 0;
  right: 0;
  z-index: 2;
}

.intersection-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(196, 18, 48, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm); /* Reduced text size for "STAR Research" */
  color: #ffffff;
  text-align: center;
  border: 3px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 20px rgba(196, 18, 48, 0.4);
  z-index: 10;
  transition: all var(--transition-normal);
}

.intersection-center:hover {
  transform: translate(-50%, -50%) scale(1.1);
  background: #FBEFF2; /* Same red tint as team cards */
  box-shadow: 0 4px 20px rgba(196, 18, 48, 0.4);
}

/* Responsive adjustments for intersection graph */
@media (max-width: 768px) {
  .intersection-graph {
    width: 300px;
    height: 300px;
  }
  
  .intersection-circle {
    width: 180px;
    height: 180px;
    font-size: var(--font-size-sm);
  }
  
  /* keep the top circle centred at the smaller size: (300 - 180) / 2 */
  .intersection-circle.sustainability {
    left: 60px;
  }
  
  .intersection-center {
    width: 95px;
    height: 95px;
    font-size: var(--font-size-xs);
  }
}

/* Last updated styling */
.last-updated {
  font-size: var(--font-size-sm);
  color: #888888;
  font-style: italic;
  margin-top: var(--spacing-sm);
  border-top: 1px solid #555555;
  padding-top: var(--spacing-sm);
}

/* Team Preview Cards (for index.html) */
.team-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.team-preview-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 30px; /* Reduced padding */
  text-align: center;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  min-height: 320px; /* Reduced height */
  min-width: 280px; /* Reduced width */
}

.team-preview-card:hover {
  background: #FBEFF2; /* Soft, muted red tint background */
  color: black;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.team-preview-card__image-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.team-preview-card__image {
  width: 100px; /* Reduced from 180px */
  height: 100px; /* Reduced from 180px */
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-color);
}

.team-preview-card__emoji {
  font-size: 100px; /* Reduced from 180px */
  line-height: 1;
}

.team-preview-card__name {
  font-size: var(--font-size-xl); /* Reduced from 2xl */
  font-weight: var(--font-weight-semibold);
  margin: 0;
  color: var(--text-color);
  line-height: var(--line-height-tight);
}

.team-preview-card:hover .team-preview-card__name {
  color: black;
}

.team-preview-card__title {
  font-size: var(--font-size-base); /* Reduced from lg */
  color: black; /* Changed to black */
  margin: 0;
  line-height: var(--line-height-normal);
  font-weight: var(--font-weight-medium);
}

.team-preview-card:hover .team-preview-card__title {
  color: black;
}

.team-preview-card__research {
  font-size: var(--font-size-sm); /* Reduced from base */
  color: #C41230; /* Carnegie Red */
  font-style: italic;
  margin: 0;
  line-height: var(--line-height-normal);
  text-align: center;
}

.team-preview-card:hover .team-preview-card__research {
  color: black;
}

.team-preview-card__links {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: center;
  flex-wrap: wrap;
}

.team-preview-card__links a {
  font-size: var(--font-size-lg);
  text-decoration: none;
  padding: 4px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
  opacity: 0.8;
}

.team-preview-card__links a:hover {
  opacity: 1;
  transform: scale(1.1);
}

.team-preview-card:hover .team-preview-card__links a {
  opacity: 1;
}
/* Alumni subsection heading on the People page */
.section-subtitle {
  font-size: 30px;
  font-weight: var(--font-weight-semibold);
  color: var(--text-color);
  text-align: center;
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

/* Dissertation title on People page cards */
.person-card__research {
  font-size: var(--font-size-sm);
  color: #C41230;
  font-style: italic;
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-normal);
}