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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
}

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.logo-text h1 {
  font-size: 1.5rem;
  color: #e74c3c;
  margin: 0;
}

.tagline {
  font-size: 0.875rem;
  color: #7f8c8d;
  margin: 0.25rem 0 0 0;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-list a {
  text-decoration: none;
  color: #2c3e50;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-list a:hover {
  color: #3498db;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #2c3e50;
  margin: 3px 0;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.hero-content h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: 0.75rem 2rem;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  border: 2px solid rgba(255, 255, 255, 0.3);
  transition: background 0.3s;
}

.cta-button:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Content Sections */
.content-section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-intro {
  font-size: 1.1rem;
  color: #7f8c8d;
  max-width: 600px;
  margin: 0 auto;
}

.content-grid, .research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.content-block, .research-item {
  padding: 2rem;
  background: #f8f9fa;
  border-radius: 8px;
}

.content-block {
  text-align: center;
}

.content-block h3, .research-item h3 {
  color: #2c3e50;
  margin-bottom: 1rem;
}

.section-content h2 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 2rem;
}

.content-block {
  text-align: center;
}

.research-item {
  text-align: center;
}

.research-item {
  text-align: center;
}

.research-item img {
  width: 100%;
  max-width: 250px;
  height: auto;
  border-radius: 8px;
  margin-top: 1rem;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

/* Contact Section */
.contact-content {
  display: flex;
  justify-content: center;
}

.contact-info {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 8px;
}

.contact-item h3 {
  font-size: 1rem;
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.contact-item a {
  color: #3498db;
  text-decoration: none;
}

.contact-item a:hover {
  text-decoration: underline;
}

.contact-form {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 8px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: inherit;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-button {
  background: #3498db;
  color: white;
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

.submit-button:hover {
  background: #2980b9;
}

/* Footer */
.site-footer {
  background: #2c3e50;
  color: white;
  padding: 2rem 0 1rem 0;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo {
  width: 30px;
  height: 30px;
}

.footer-logo-text h3 {
  font-size: 1.25rem;
  color: #e74c3c;
  margin: 0 0 0.5rem 0;
}

.footer-logo-text p {
  color: #bdc3c7;
  font-size: 0.875rem;
  margin: 0;
}

.footer-nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.footer-nav a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #34495e;
  padding-top: 1rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: #95a5a6;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid #e5e5e5;
    display: none;
  }

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

  .nav-list li {
    margin: 0.5rem 0;
  }

  .hero-content h2 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1.1rem;
  }

  .content-section {
    padding: 2rem 0;
  }

  .content-grid, .research-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1.5rem;
  }

  .footer-nav ul {
    flex-direction: column;
    gap: 1rem;
  }
}