.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background-color: rgba(247, 250, 252, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding-top: var(--safe-top);
  transition: all var(--transition-fast);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--navy);
  letter-spacing: -0.03em;
}

.site-logo-symbol {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--accent) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 900;
  font-size: 1.1rem;
}

.site-nav-desktop {
  display: none;
}

.site-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  color: var(--navy);
  cursor: pointer;
}

.mobile-drawer {
  position: fixed;
  inset: 0;
  background-color: var(--background);
  z-index: 600;
  display: flex;
  flex-direction: column;
  padding: var(--safe-top) 1.25rem var(--safe-bottom) 1.25rem;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.mobile-drawer-close {
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1 1 auto;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  border-bottom: 1px solid rgba(221, 229, 237, 0.6);
  min-height: 48px;
}

.mobile-nav-group {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid rgba(221, 229, 237, 0.6);
}

.mobile-nav-group-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  background: none;
  border: none;
  width: 100%;
  cursor: pointer;
  min-height: 48px;
}

.mobile-nav-group-items {
  display: none;
  flex-direction: column;
  padding-left: 1rem;
  padding-bottom: 0.75rem;
  gap: 0.5rem;
}

.mobile-nav-group.is-expanded .mobile-nav-group-items {
  display: flex;
}

.mobile-nav-subitem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.95rem;
  color: var(--muted-foreground);
  min-height: 44px;
}

.mobile-drawer-footer {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.site-footer {
  background-color: var(--navy);
  color: #FFFFFF;
  padding-top: 4rem;
  padding-bottom: max(2rem, var(--safe-bottom));
  margin-top: 4rem;
  border-top: 1px solid var(--navy-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FFFFFF;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: #94A3B8;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-link:hover {
  color: #FFFFFF;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--navy-light);
  font-size: 0.85rem;
  color: #94A3B8;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .mobile-menu-toggle {
    display: none;
  }
  .mobile-drawer {
    display: none;
  }
  .site-nav-desktop {
    display: flex;
    align-items: center;
    gap: 1.75rem;
  }
  .desktop-nav-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--foreground);
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
  }
  .desktop-nav-link:hover {
    color: var(--accent);
  }
  .desktop-nav-group {
    position: relative;
  }
  .desktop-mega-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 680px;
    padding: 1.5rem;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    z-index: 550;
  }
  .desktop-nav-group:hover .desktop-mega-menu,
  .desktop-nav-group:focus-within .desktop-mega-menu {
    display: grid;
    transform: translateX(-50%) translateY(0);
  }
  .mega-menu-section-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--muted-foreground);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .mega-menu-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
  }
  .mega-menu-item:hover {
    background-color: var(--secondary);
  }
  .mega-menu-item-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--navy);
  }
  .mega-menu-item-desc {
    font-size: 0.8rem;
    color: var(--muted-foreground);
  }
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}