.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1rem 0;
  background: rgba(248, 251, 255, 0.76);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(220, 231, 255, 0.8);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: var(--shadow);
}

.brand-mark svg {
  width: 1.3rem;
  height: 1.3rem;
}

.brand-text {
  font-size: 1.05rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.28rem;
  border: 0;
  background: transparent;
  padding: 0.3rem;
  cursor: pointer;
}

.menu-toggle span {
  width: 1.35rem;
  height: 2px;
  border-radius: 99px;
  background: var(--text);
  transition: transform 160ms ease, opacity 160ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.3rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 18px 40px rgba(11, 95, 255, 0.2);
}

.button-secondary {
  color: var(--primary);
  background: white;
  border-color: var(--border);
}

.button-small {
  padding: 0.7rem 1rem;
}

.info-card,
.stat-card,
.timeline-item,
.contact-form {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(220, 231, 255, 0.95);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card-grid {
  display: grid;
  gap: 1.25rem;
}

.info-card {
  padding: 1.5rem;
}

.text-link {
  color: var(--primary);
  font-weight: 600;
}

.feature-list {
  padding-left: 1rem;
  color: var(--muted);
}

.feature-list li + li {
  margin-top: 0.65rem;
}

.site-footer {
  padding-top: 4rem;
  background: linear-gradient(135deg, #071a3b, #0d2760);
  color: rgba(255, 255, 255, 0.84);
}

.site-footer .brand-mark {
  box-shadow: 0 12px 30px rgba(11, 95, 255, 0.25);
}

.article-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.4rem;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(220, 231, 255, 0.95);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.category-list,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.category-list a,
.tag-list a {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(11, 95, 255, 0.08);
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 600;
}

.search-box {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.search-box input {
  flex: 1 1 240px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.8rem 1rem;
  background: white;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  min-height: 2.5rem;
  padding: 0 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  color: var(--text);
}

.pagination a.is-current {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.social-share {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.social-share a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  background: rgba(11, 95, 255, 0.08);
  color: var(--primary);
  font-weight: 600;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding-bottom: 2rem;
}

.site-footer h3 {
  color: white;
  font-size: 1rem;
  margin-bottom: 0.85rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li + li {
  margin-top: 0.55rem;
}

.site-footer a {
  color: inherit;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.2rem 0 2rem;
}