/* Nav */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
  width: 100%;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav a {
  color: var(--text-color);
  font-weight: 600;
  font-family: var(--font-sub);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.nav a:hover, .nav a.active {
  color: var(--accent-color);
  text-decoration: none;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent-color);
}

/* Hero Section */
#hero {
  padding: 4rem 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  text-align: center;
  margin-bottom: 2rem;
}

#hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

#hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  color: var(--text-muted);
}

/* About Section */
#about {
  padding-bottom: 2rem; /* Reduced padding to sit closer to Education/Interests */
}

.about-content {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.about-photo {
  flex: 0 0 300px;
  text-align: center;
}

.about-photo img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.about-links {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.about-details {
  flex: 1;
  min-width: 300px;
}

.about-details .lead {
  font-size: 1.2rem;
  color: #333;
}

@media (max-width: 768px) {
  .about-content {
    justify-content: center;
    gap: 2rem;
  }

  .about-photo {
    flex: 0 0 100%;
    max-width: 300px;
    margin: 0 auto;
  }

  .about-details {
    min-width: 100%;
    text-align: center;
  }
  
  .about-details h2 {
    display: block;
    border-bottom: none;
    margin-bottom: 1rem;
  }
  
  .about-details h2::after {
     content: "";
     display: block;
     width: 60px;
     height: 3px;
     background: var(--accent-color);
     margin: 0.5rem auto 0;
  }
}

/* Info Grid (Education & Interests) */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  padding-top: 0; /* Ensure no extra top padding */
}

@media (max-width: 768px) {
  .info-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Experience Section */
.experience-list {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid #e9ecef;
}

.experience-item {
  position: relative;
  margin-bottom: 2rem;
}

.experience-item::before {
  content: "";
  position: absolute;
  left: -2.6rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  background: #fff;
  border: 3px solid var(--accent-color);
  border-radius: 50%;
  z-index: 1;
}

.experience-item.current::before {
  background: var(--accent-color);
}

.experience-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  transition: transform 0.2s;
}

.experience-card:hover {
  transform: translateX(5px);
}

.experience-details {
  margin: 0;
  padding-left: 1.5rem;
  color: var(--text-color);
  list-style-type: disc;
}

.experience-details li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--card-bg);
  border: none;
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.1);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: calc(var(--border-radius) - 4px);
  margin-bottom: 1.5rem;
  background-color: #f0f0f0;
}

/* Mobile adjustments for cards */
@media (max-width: 768px) {
  .card img {
    display: none; /* Hide images on phone */
  }
  
  .grid {
    grid-template-columns: 1fr; /* Stack cards */
    gap: 1rem;
  }
  
  .card {
    padding: 1.5rem;
  }
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card h3 a {
  color: #345676;
}

.card h3 a:hover {
  color: var(--accent-color);
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  flex-grow: 1;
}

/* Publications */
.pub-item {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
  border: 1px solid #f0f0f0;
  transition: transform 0.2s;
}

.pub-item:hover {
  transform: translateX(4px);
  border-color: #e0e0e0;
}

.pub-title {
  font-weight: 700;
  font-size: 1.25rem;
  display: block;
  margin-bottom: 0.5rem;
  color: #345676;
}

.pub-authors {
  color: var(--text-color);
  font-family: var(--font-sub);
  margin-bottom: 0.5rem;
}

.pub-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0.5rem 0 1rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.35em 0.65em;
  font-size: 0.75em;
  font-weight: 600;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 4px;
  background-color: #f1f3f5;
  color: #495057;
  margin-right: 0.5rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-primary {
  background-color: var(--accent-color);
  color: white;
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  user-select: none;
  padding: 0.6rem 1.5rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 50px;
  transition: all 0.2s ease-in-out;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-sub);
}

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

.btn-primary:hover {
  background-color: #1a3c5a;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(44, 73, 100, 0.3);
  text-decoration: none;
  color: white;
}

.btn-sm {
  padding: 0.3rem 0.8rem;
  font-size: 0.875rem;
}

.btn-outline {
  color: var(--accent-color);
  border-color: var(--accent-color);
  background: transparent;
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: white;
  text-decoration: none;
  transform: translateY(-2px);
}

/* Forms */
.form-control {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-color);
  background-color: #fff;
  border: 1px solid #e9ecef;
  border-radius: 6px;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  border-color: var(--accent-color);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(44, 73, 100, 0.1);
}

.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}