/* HAICoLab Custom Styles */
/* Professional & Academic Design */

:root {
  /* Color Palette */
  --primary-navy: #1e3a8a;
  --primary-blue: #3b82f6;
  --secondary-blue: #2563eb;
  --dark-text: #1f2937;
  --gray-text: #6b7280;
  --light-gray: #f9fafb;
  --border-color: #e5e7eb;
  --white: #ffffff;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Global Styles */
body {
  font-family: var(--font-sans);
  color: var(--dark-text);
  line-height: 1.6;
  background-color: var(--white);
}

/* Navigation */
.navbar {
  background-color: var(--white) !important;
  border-bottom: 2px solid var(--border-color);
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-navy) !important;
}

.nav-link {
  color: var(--gray-text) !important;
  font-weight: 500;
  margin: 0 0.5rem;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-blue) !important;
}

.nav-link.active {
  color: var(--primary-navy) !important;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
  color: var(--white);
  padding: 4rem 0;
  margin-bottom: 3rem;
}

.hero-section h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-section .lead {
  font-size: 1.25rem;
  opacity: 0.95;
}

/* Profile Section */
.profile-section {
  padding: 3rem 0;
}

.profile-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--primary-blue);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.profile-name {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 0.5rem;
}

.profile-title {
  font-size: 1.25rem;
  color: var(--gray-text);
  margin-bottom: 1rem;
}

.profile-affiliation {
  font-size: 1rem;
  color: var(--dark-text);
  margin-bottom: 1.5rem;
}

/* Social Links */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: var(--light-gray);
  color: var(--dark-text);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.social-link:hover {
  background-color: var(--primary-blue);
  color: var(--white);
  border-color: var(--primary-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
}

/* Section Styles */
.section {
  padding: 3rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--primary-blue);
  display: inline-block;
}

.subsection-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* Card Styles */
.custom-card {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  background-color: var(--white);
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.custom-card:hover {
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
  transform: translateY(-4px);
  border-color: var(--primary-blue);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.75rem;
}

.card-meta {
  font-size: 0.9rem;
  color: var(--gray-text);
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--dark-text);
  line-height: 1.6;
}

/* Publication Item */
.publication-item {
  padding: 1.5rem;
  border-left: 3px solid var(--primary-blue);
  background-color: var(--light-gray);
  margin-bottom: 1.5rem;
  border-radius: 4px;
}

.publication-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.5rem;
}

.publication-authors {
  font-size: 0.95rem;
  color: var(--dark-text);
  margin-bottom: 0.25rem;
}

.publication-venue {
  font-size: 0.9rem;
  color: var(--gray-text);
  font-style: italic;
  margin-bottom: 0.5rem;
}

.publication-links a {
  display: inline-block;
  margin-right: 1rem;
  color: var(--primary-blue);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.publication-links a:hover {
  color: var(--primary-navy);
  text-decoration: underline;
}

/* Member Card */
.member-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--white);
  transition: all 0.3s ease;
  height: 100%;
}

.member-card:hover {
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
  transform: translateY(-4px);
}

.member-img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  border: 3px solid var(--primary-blue);
}

.member-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.5rem;
}

.member-role {
  font-size: 0.95rem;
  color: var(--gray-text);
  margin-bottom: 0.5rem;
}

.member-research {
  font-size: 0.9rem;
  color: var(--dark-text);
}

/* Education Timeline */
.education-item {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1.5rem;
  border-left: 2px solid var(--primary-blue);
}

.education-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--primary-blue);
}

.education-year {
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.25rem;
}

.education-degree {
  font-size: 1rem;
  color: var(--dark-text);
  margin-bottom: 0.25rem;
}

.education-advisor {
  font-size: 0.9rem;
  color: var(--gray-text);
}

/* Buttons */
.btn-primary {
  background-color: var(--primary-blue);
  border-color: var(--primary-blue);
  color: var(--white);
  font-weight: 500;
  padding: 0.5rem 1.5rem;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: var(--primary-navy);
  border-color: var(--primary-navy);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(30, 58, 138, 0.3);
}

/* Footer */
.footer {
  background-color: var(--light-gray);
  border-top: 2px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
  color: var(--gray-text);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }

  .profile-img {
    width: 150px;
    height: 150px;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

/* Utilities */
.text-navy {
  color: var(--primary-navy);
}

.text-primary-blue {
  color: var(--primary-blue);
}

.bg-light-gray {
  background-color: var(--light-gray);
}