.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
}

.header-brand {
  flex: 0 0 auto;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-blue);
}

.header-brand a {
  text-decoration: none;
  color: inherit;
}

.header-brand a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

.header-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.header-tools {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.primary-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2) var(--space-3);
}

.primary-menu > li {
  position: relative;
}

.primary-menu a {
  font-family: var(--font-accent);
  text-transform: uppercase;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: var(--color-black);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.primary-menu a:hover {
  color: var(--color-red);
}

.primary-menu a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

.primary-menu .current-menu-item > a,
.primary-menu .current-menu-ancestor > a {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
  font-weight: 600;
}

.primary-menu .sub-menu {
  list-style: none;
  margin: 0;
  padding: var(--space-1) 0;
  min-width: 12rem;
  background: var(--color-white);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.25rem);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.primary-menu li:hover > .sub-menu,
.primary-menu li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.primary-menu .sub-menu a {
  text-transform: none;
  font-size: var(--fs-meta);
  letter-spacing: 0.02em;
  padding: 0.5rem var(--space-2);
  min-height: 2.75rem;
  width: 100%;
  border-bottom: 0;
}

.primary-menu .sub-menu a:hover,
.primary-menu .sub-menu a:focus-visible {
  color: var(--color-red);
  background: var(--color-gray-1);
}

.primary-menu .sub-menu .current-menu-item > a {
  color: var(--color-blue);
  background: transparent;
  font-weight: 600;
}

.lang-switcher {
  position: relative;
  z-index: 1002;
}

.lang-switcher__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.35rem 0.6rem;
  min-height: 36px;
  font-family: var(--font-accent);
  font-size: var(--fs-meta);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-black);
  background: transparent;
  border: 1px solid var(--color-gray-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    color var(--transition),
    border-color var(--transition),
    background-color var(--transition);
}

.lang-switcher__toggle:hover {
  color: var(--color-blue);
  border-color: var(--color-blue);
}

.lang-switcher__toggle:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.lang-switcher__current {
  line-height: 1;
}

.lang-switcher__caret {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentcolor;
  transition: transform var(--transition);
}

.lang-switcher.is-open .lang-switcher__caret {
  transform: rotate(180deg);
}

.lang-switcher__list {
  list-style: none;
  margin: 0;
  padding: var(--space-1) 0;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 100%;
  background: var(--color-white);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.25rem);
  transition:
    opacity 0.2s ease,
    visibility 0.2s ease,
    transform 0.2s ease;
}

.lang-switcher.is-open .lang-switcher__list {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__item {
  margin: 0;
}

.lang-switcher__item a {
  display: block;
  padding: 0.45rem 0.75rem;
  font-family: var(--font-accent);
  font-size: var(--fs-meta);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--color-black);
  transition:
    color var(--transition),
    background-color var(--transition);
}

.lang-switcher__item a:hover {
  color: var(--color-red);
  background: var(--color-gray-1);
}

.lang-switcher__item a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: -2px;
}

.nav-toggle {
  display: none;
  flex-shrink: 0;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.625rem;
  margin: -0.625rem -0.625rem -0.625rem 0;
  min-width: 2.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-black);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .header-brand {
    order: 1;
  }

  .header-tools {
    order: 2;
  }

  .header-nav {
    order: 3;
    width: 100%;
    flex: 1 1 100%;
    justify-content: stretch;
    display: none;
    padding-top: var(--space-1);
    border-top: 1px solid var(--color-gray-2);
    margin-top: var(--space-1);
  }

  .header-nav.is-open {
    display: block;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    justify-content: flex-start;
  }

  .primary-menu > li > a {
    min-height: 44px;
    padding: var(--space-1) 0;
    border-bottom: 1px solid var(--color-gray-2);
  }

  .primary-menu > li:last-child > a {
    border-bottom: 0;
  }

  .primary-menu .current-menu-item > a,
  .primary-menu .current-menu-ancestor > a {
    border-bottom-color: var(--color-gray-2);
    box-shadow: inset 3px 0 0 var(--color-blue);
  }

  .primary-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: var(--color-gray-1);
    border-radius: 0;
    padding: var(--space-1) var(--space-2);
    margin: 0 0 var(--space-1);
  }

  .primary-menu .sub-menu a {
    min-height: 44px;
    border-bottom: 0;
    padding-left: var(--space-3);
  }

  .lang-switcher__toggle {
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
  }

  body.zp-nav-open {
    overflow: hidden;
    touch-action: none;
  }
}