.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.35);
}

.nav-wrap,
.section-wrap,
.footer-wrap {
  width: min(100% - 2rem, var(--max-content));
  margin-inline: auto;
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 4rem;
}

.brand {
  color: var(--color-white);
  text-decoration: none;
}

.brand strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1rem;
}

.brand span {
  display: block;
  font-size: 0.85rem;
  color: var(--gray-200);
  font-family: var(--font-meta);
}

.nav-links {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  margin-left: auto;
}

.nav-links a {
  color: var(--color-white);
  text-decoration: none;
  font-weight: 500;
  font-family: var(--font-heading);
  font-size: 0.95rem;
}

.nav-links a[aria-current="page"] {
  color: var(--brand-blue-600);
  border-bottom: 2px solid var(--brand-blue-600);
}

.nav-item--dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  background: transparent;
  border: 0;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0;
  cursor: pointer;
}

.nav-dropdown-trigger[aria-current="page"] {
  color: var(--brand-blue-600);
}

.nav-dropdown-panel {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  background: #ffffff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  min-width: 220px;
  display: none;
}

.nav-dropdown-panel[data-open="true"],
.nav-item--dropdown:hover .nav-dropdown-panel,
.nav-item--dropdown:focus-within .nav-dropdown-panel {
  display: block;
}

.nav-dropdown-panel a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--ink-900);
  border-radius: var(--radius-sm);
}

.nav-dropdown-panel a:hover,
.nav-dropdown-panel a:focus-visible {
  background: var(--gray-50);
  color: var(--brand-blue-700);
}

.nav-dropdown-panel a[aria-current="page"] {
  color: var(--brand-blue-600);
}

.nav-search {
  margin-left: var(--space-2);
}

.nav-search input {
  border: 1px solid var(--gray-400);
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.2);
  color: #ffffff;
  padding: var(--space-2) var(--space-3);
}

.nav-search input::placeholder {
  color: var(--gray-200);
}

.section {
  padding-block: var(--space-6);
}

.section-light {
  background: var(--color-ivory);
}

.section-dark {
  background: var(--color-slate);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3,
.section-dark p {
  color: var(--color-white);
}

.grid {
  display: grid;
  gap: var(--space-3);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.footer {
  background: var(--ink-900);
  color: var(--gray-200);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-5);
  padding: var(--space-6) var(--space-4);
}

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: var(--space-2);
}