/* CSS Variables */
:root {
  --primary-color: #7b1e3f;
  --secondary-color: #e8d5b7;
  --accent-color: #2e5c85;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #fff;
  --bg-light: #f8f9fa;
  --border-color: #e0e0e0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Roboto Slab', serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary-color);
}

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

a:hover {
  color: var(--primary-color);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header Styles */
.site-header {
  background: var(--primary-color);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo-text {
  font-family: 'Roboto Slab', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.logo-subtitle {
  font-size: 0.8rem;
  color: var(--secondary-color);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-menu a {
  color: #fff;
  font-weight: 600;
  padding: 8px 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary-color);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.hamburger {
  display: block;
  width: 25px;
  height: 3px;
  background: #fff;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 3px;
  background: #fff;
  left: 0;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

/* Main Content */
.main-content {
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, #4a1028 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 30px;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

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

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

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

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

/* Section Styles */
.section {
  padding: 60px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.section-title p {
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.card {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.card-icon {
  font-size: 3rem;
  color: #fff;
}

.card-content {
  padding: 25px;
}

.card-content h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card-content p {
  color: var(--text-light);
  margin-bottom: 15px;
}

/* Team Section */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.team-card {
  text-align: center;
  background: #fff;
  border-radius: 10px;
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-5px);
}

.team-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #fff;
  overflow: hidden;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}

.team-card .role {
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 10px;
}

.team-card p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* Publications */
.publication-list {
  max-width: 900px;
  margin: 0 auto;
}

.publication-item {
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary-color);
}

.publication-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.publication-item .authors {
  color: var(--text-light);
  margin-bottom: 5px;
}

.publication-item .journal {
  color: var(--accent-color);
  font-style: italic;
}

.publication-item .year {
  background: var(--primary-color);
  color: #fff;
  padding: 3px 10px;
  border-radius: 15px;
  font-size: 0.85rem;
  display: inline-block;
  margin-top: 10px;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.contact-info h3 {
  margin-bottom: 20px;
}

.contact-info p {
  margin-bottom: 15px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.contact-info strong {
  min-width: 80px;
}

.map-container {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  height: 300px;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, #4a1028 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  color: #fff;
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.page-header p {
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Footer */
.site-footer {
  background: #1a1a1a;
  color: #ccc;
  padding: 50px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 30px;
}

.footer-section h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 8px;
}

.footer-section a {
  color: #ccc;
}

.footer-section a:hover {
  color: var(--secondary-color);
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 20px;
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-color);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li {
    padding: 10px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 40px 0;
  }

  .page-header {
    padding: 40px 0;
  }

  .page-header h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mb-20 {
  margin-bottom: 20px;
}

.mb-40 {
  margin-bottom: 40px;
}

/* Research Areas Icons */
.research-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-icon svg {
  width: 40px;
  height: 40px;
  fill: #fff;
}

/* News Section */
.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

.news-date {
  flex-shrink: 0;
  background: var(--primary-color);
  color: #fff;
  padding: 10px 15px;
  border-radius: 5px;
  text-align: center;
  min-width: 80px;
}

.news-date .day {
  font-size: 1.5rem;
  font-weight: 700;
  display: block;
}

.news-date .month {
  font-size: 0.85rem;
  text-transform: uppercase;
}

.news-content h3 {
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.news-content p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-text h2 {
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 15px;
}

.about-stats {
  background: var(--bg-light);
  padding: 30px;
  border-radius: 10px;
}

.stat-item {
  text-align: center;
  padding: 15px;
}

.stat-item .number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  font-family: 'Roboto Slab', serif;
}

.stat-item .label {
  color: var(--text-light);
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }
}