:root {
  --accent: #0f4c5c;
  --accent-soft: #e8f1f4;
  --ink: #22313f;
  --muted: #5f6f7f;
  --border: #d7e1e8;
  --card: #ffffff;
}

body {
  color: var(--ink);
}

.main-container {
  max-width: 1080px;
}

.navbar {
  box-shadow: 0 8px 20px rgba(34, 49, 63, 0.12);
}

.navbar-inverse {
  background-color: #143642;
  border-color: #143642;
}

.navbar-inverse .navbar-brand,
.navbar-inverse .navbar-nav > li > a {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
}

.navbar-inverse .navbar-nav > .active > a,
.navbar-inverse .navbar-nav > .active > a:hover,
.navbar-inverse .navbar-nav > .active > a:focus,
.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > li > a:focus {
  background-color: #0f4c5c;
  color: #ffffff;
}

.navbar .fa {
  margin-right: 0.35rem;
}

.homepage-hero {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin: 1.5rem 0 2rem;
  padding: 2rem;
  background: linear-gradient(135deg, #f9fbfc 0%, #eef5f7 100%);
  border: 1px solid var(--border);
  border-radius: 18px;
}

.homepage-copy {
  flex: 1 1 0;
}

.homepage-kicker {
  margin: 0 0 0.6rem;
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.homepage-lead {
  font-size: 1.75rem;
  line-height: 1.35;
  margin: 0 0 1rem;
}

.homepage-summary {
  font-size: 1.16rem;
  line-height: 1.85;
  color: var(--muted);
  margin: 0;
}

.homepage-photo {
  width: 225px;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 28px rgba(15, 76, 92, 0.12);
}

.homepage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 0 0 2rem;
}

.homepage-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 8px 20px rgba(34, 49, 63, 0.05);
}

.homepage-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--accent);
}

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

.quick-link {
  display: inline-block;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.quick-link:hover,
.quick-link:focus {
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
}

.contact-block p:last-child {
  margin-bottom: 0;
}

.news-list {
  padding-left: 1.2rem;
  margin-bottom: 0;
}

.news-list li {
  margin-bottom: 0.75rem;
}

.news-list li:last-child {
  margin-bottom: 0;
}

.research-section {
  margin: 1.75rem 0 2rem;
  padding: 1.5rem;
  background: #fbfcfd;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.research-section h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  color: var(--accent);
}

.research-section-intro {
  margin-bottom: 1rem;
  color: var(--muted);
}

.research-list {
  margin-bottom: 0;
  padding-left: 1.4rem;
}

.research-list li {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.research-list li:last-child {
  margin-bottom: 0;
}

.journal-note {
  color: var(--muted);
  font-weight: 600;
}

.status-badge {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  vertical-align: middle;
}

.code-section {
  margin: 1.75rem 0 2rem;
  padding: 1.5rem;
  background: #fbfcfd;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.code-section h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  color: var(--accent);
}

.code-section-intro {
  margin-bottom: 1rem;
  color: var(--muted);
}

.code-list {
  display: grid;
  gap: 1rem;
}

.code-item {
  padding: 1.1rem 1.2rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 14px;
}

.code-item h4 {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
}

.code-links {
  display: inline-block;
  margin-left: 0.35rem;
  font-weight: 600;
}

.code-item p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.teaching-section {
  margin: 1.75rem 0 2rem;
  padding: 1.5rem;
  background: #fbfcfd;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.teaching-section h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  color: var(--accent);
}

.teaching-section-intro {
  margin-bottom: 1rem;
  color: var(--muted);
}

.teaching-list {
  display: grid;
  gap: 1rem;
}

.teaching-item {
  padding: 1.1rem 1.2rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 14px;
}

.teaching-item h4 {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
  color: var(--ink);
}

.teaching-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.site-footer {
  margin-top: 3rem;
  padding: 2rem 0 1rem;
  border-top: 1px solid var(--border);
}

.site-footer-inner {
  text-align: center;
}

.site-footer-title {
  margin: 0 0 0.3rem;
  font-weight: 700;
  color: var(--accent);
}

.site-footer-text {
  margin: 0.2rem 0;
  color: var(--muted);
}

.site-footer-links {
  margin: 0.75rem 0;
}

.site-footer-links a {
  display: inline-block;
  margin: 0 0.55rem 0.4rem;
  font-weight: 600;
}

@media (max-width: 767px) {
  .research-section {
    padding: 1.2rem;
  }

  .code-section {
    padding: 1.2rem;
  }

  .teaching-section {
    padding: 1.2rem;
  }
}

@media (max-width: 767px) {
  .homepage-hero {
    flex-direction: column-reverse;
    padding: 1.4rem;
  }

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

  .homepage-lead {
    font-size: 1.45rem;
  }

  .homepage-summary {
    font-size: 1.08rem;
  }
}