.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), height var(--transition);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-header);
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
  transition: min-height var(--transition);
}

.site-header.is-scrolled .site-header__inner {
  min-height: var(--header-h-scrolled);
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img {
  width: auto;
  height: 52px;
}

.site-header.is-scrolled .logo img {
  height: 44px;
}

.nav {
  display: none;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  padding: 0.55rem 0.62rem;
  font-size: 0.84rem;
  font-weight: var(--fw-medium);
  color: var(--color-heading);
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-primary);
}

.nav__caret {
  width: 10px;
  height: 10px;
  opacity: 0.65;
}

.nav__item {
  position: relative;
}

.nav__dropdown {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  min-width: 260px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 0.65rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.nav__item:hover .nav__dropdown,
.nav__item:focus-within .nav__dropdown,
.nav__item.is-open .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.nav__dropdown a {
  display: block;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-text);
}

.nav__dropdown a:hover,
.nav__dropdown a:focus-visible {
  background: var(--color-light);
  color: var(--color-primary);
}

.header-cta {
  display: none;
  justify-self: end;
}

.header-cta--mobile {
  display: none;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-heading);
  border-radius: 2px;
  position: relative;
  transition: transform var(--transition);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-backdrop {
  display: none;
}

@media (min-width: 1100px) {
  .nav,
  .header-cta--desktop {
    display: flex;
  }

  .nav {
    justify-content: center;
  }

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 1099px) {
  .nav-backdrop.is-visible {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(10, 31, 74, 0.45);
    z-index: calc(var(--z-header) - 1);
  }

  .nav {
    display: block;
    position: fixed;
    top: 0;
    right: 0;
    width: min(88vw, 360px);
    height: 100dvh;
    background: var(--color-white);
    padding: 5.5rem 1.25rem 2rem;
    transform: translateX(110%);
    transition: transform var(--transition);
    z-index: var(--z-header);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }

  .nav.is-open {
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .nav__link {
    width: 100%;
    justify-content: space-between;
    padding: 0.85rem 0.4rem;
    font-size: 1rem;
  }

  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    display: none;
    padding: 0 0 0.5rem 0.6rem;
  }

  .nav__item.is-open .nav__dropdown {
    display: block;
  }

  .header-cta--mobile {
    display: flex;
    margin-top: 1.25rem;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto;
  }
}