/* Global styles */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: #222222;
  background-color: #f7f7fb;
}

/* Container */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav {
  padding: 0.5rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 600;
  text-decoration: none;
  color: #1f2933;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  text-decoration: none;
  color: #4b5563;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: #2563eb; /* Accent color */
}

/* Hero section */
.hero {
  padding: 3.5rem 0 2.5rem;
  background: linear-gradient(135deg, #eef2ff, #f7f7fb);
}

.hero-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
}

.hero-text {
  flex: 1 1 260px;
}

.hero-name {
  font-size: 3rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: #111827;
}

.hero-tagline {
  margin: 0;
  font-size: 1rem;
  color: #4b5563;
}

.hero-image {
  flex: 0 0 180px;
  max-width: 220px;
}

.hero-image img {
  width: 100%;
  border-radius: 999px;
  border: 3px solid #e5e7eb;
  object-fit: cover;
}

/* Hero social links */
.hero-social-links {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Sections */
.section {
  padding: 2.75rem 0;
}

.section-alt {
  background-color: #ffffff;
}

.section h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: 1.6rem;
  color: #111827;
}

/* About text */
#about p {
  margin-bottom: 1rem;
  color: #374151;
}

/* Awards section */
.awards-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.awards-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  color: #374151;
}

.awards-list li:last-child {
  border-bottom: none;
}

/* Skills section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skill-category h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #1f2933;
  margin: 0 0 0.75rem;
}

/* Chips / Interests */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background-color: #e0ebff;
  color: #1e3a8a;
  font-size: 0.85rem;
}

/* Publications */
.publication-year-header {
  font-size: 1.5rem;
  font-weight: 600;
  color: #1f2933;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2563eb;
}

.publication-year-header:first-of-type {
  margin-top: 0;
}

.publication-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.publication-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.publication-item:last-child {
  border-bottom: none;
}

.publication-title a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}

.publication-title a:hover,
.publication-title a:focus {
  text-decoration: underline;
}

.publication-meta {
  font-size: 0.85rem;
  color: #6b7280;
  margin-top: 0.25rem;
}

.pub-authors::after {
  content: " • ";
}

/* Social links */
.social-links {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.social-link-item a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid #d1d5db;
  text-decoration: none;
  color: #374151;
  font-size: 0.9rem;
  transition: background-color 0.15s ease, color 0.15s ease,
    border-color 0.15s ease;
}

.social-link-item a:hover,
.social-link-item a:focus {
  background-color: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

.social-link-item i {
  font-size: 1.1rem;
}

.resume-download {
  background-color: #2563eb !important;
  color: #ffffff !important;
  border-color: #2563eb !important;
  font-weight: 500;
}

.resume-download:hover,
.resume-download:focus {
  background-color: #1d4ed8 !important;
  border-color: #1d4ed8 !important;
}

/* Footer */
.site-footer {
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: #6b7280;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .hero {
    padding-top: 2.5rem;
  }

  .hero-content {
    flex-direction: column-reverse;
    align-items: flex-start;
  }

  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
}