.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  min-height: var(--header-height);
  padding-top: var(--safe-top);
  background: var(--color-bg-header);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: var(--header-height);
}

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

.site-header__logo img {
  display: block;
  height: 2rem;
  width: auto;
  max-width: 10rem;
}

.site-header__name {
  font-family: var(--font-display);
  font-weight: var(--weight-heading);
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.site-header__external {
  margin-left: auto;
  flex-shrink: 0;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: var(--space-sm);
  border: 0;
  background: transparent;
  color: var(--color-primary);
}

.site-header__toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
}

.site-nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  padding: var(--space-lg) var(--container-padding) calc(var(--space-xl) + var(--safe-bottom));
  background: var(--color-bg-header);
  border-bottom: 1px solid var(--color-border);
}

.site-nav.is-open {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-height: calc(100vh - var(--header-height) - var(--safe-top));
  max-height: calc(100dvh - var(--header-height) - var(--safe-top));
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.site-nav.is-open .site-nav__cta {
  width: 100%;
}

.site-nav.is-open .lang-switch {
  align-self: flex-start;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 transparent;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.site-nav__cta {
  margin-bottom: var(--space-md);
}

@supports (-webkit-touch-callout: none) {
  .site-nav.is-open {
    max-height: calc(100svh - var(--header-height) - var(--safe-top));
  }
}

@media (min-width: 1200px) {
  .site-header__toggle {
    display: none;
  }

  .site-nav,
  .site-nav.is-open {
    display: flex;
    position: static;
    align-items: center;
    gap: var(--space-sm);
    margin-left: auto;
    padding: 0;
    max-height: none;
    overflow: visible;
    background: transparent;
    border: 0;
  }

  .site-nav__list {
    flex-direction: row;
    align-items: center;
    margin-bottom: 0;
    gap: 0.75rem;
  }

  .site-nav__link {
    font-size: 0.875rem;
    min-height: 2.5rem;
  }

  .site-header__external {
    order: 2;
    margin-left: var(--space-sm);
  }

  .site-nav__cta {
    margin-bottom: 0;
    flex-shrink: 0;
    min-height: 2.5rem;
    padding: 0.5rem 0.85rem;
    font-size: 0.8125rem;
    white-space: nowrap;
  }

  .site-nav .lang-switch__btn {
    min-width: 2.25rem;
    min-height: 2.25rem;
  }
}

@media (min-width: 1440px) {
  .site-nav {
    gap: var(--space-md);
  }

  .site-nav__list {
    gap: var(--space-lg);
  }

  .site-nav__link {
    font-size: 0.9375rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav__link {
    transition: none;
  }
}