.site-header {
  position: relative;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: 1240px;
  min-height: 60px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-7);
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
}

.product-mark {
  display: flex;
  align-items: center;
  justify-self: start;
  text-decoration: none;
}

.product-mark__name {
  color: var(--color-brand);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.primary-nav {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.primary-nav__link {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border: 0;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--color-ink-soft);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible,
.primary-nav__link.is-active,
.nav-dropdown.is-active > .primary-nav__link,
.nav-dropdown.is-open > .primary-nav__link {
  background: var(--color-brand-soft);
  color: var(--color-brand);
}

.primary-nav__link.is-active,
.nav-dropdown.is-active > .primary-nav__link { font-weight: 600; }

.primary-nav__link:focus-visible,
.nav-dropdown__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.nav-dropdown { position: relative; }
.nav-dropdown__chevron {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 160ms ease;
}
.nav-dropdown.is-open .nav-dropdown__chevron { transform: rotate(225deg) translate(-2px, -2px); }

.nav-dropdown__panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 190px;
  padding: 8px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-m);
  background: var(--color-surface);
  box-shadow: 0 16px 40px rgba(23, 32, 51, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  pointer-events: none;
  transition: opacity 140ms ease, transform 140ms ease, visibility 140ms ease;
}

.nav-dropdown.is-open .nav-dropdown__panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-dropdown__link {
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 9px 11px;
  border-radius: var(--radius-s);
  color: var(--color-ink-soft);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

.nav-dropdown__link:hover { background: var(--color-surface-alt); color: var(--color-ink); }
.nav-dropdown__link.is-active { background: var(--color-brand-soft); color: var(--color-brand); font-weight: 600; }

.language-switcher { justify-self: end; }
.language-switcher__trigger {
  min-height: 38px; display: inline-flex; align-items: center; gap: 7px; padding: 7px 10px;
  border: 1px solid var(--color-line); border-radius: var(--radius-s); background: var(--color-surface);
  color: var(--color-ink-soft); font: inherit; font-size: 13px; cursor: pointer;
}
.language-switcher__trigger:hover,
.language-switcher__trigger:focus-visible,
.language-switcher.is-open .language-switcher__trigger { border-color: var(--color-brand); color: var(--color-brand); }
.language-switcher__trigger:focus-visible,
.language-switcher__option:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.language-switcher__menu { right: 0; left: auto; width: 138px; }
.language-switcher__option {
  width: 100%; min-height: 40px; display: flex; align-items: center; padding: 8px 11px; border: 0;
  border-radius: var(--radius-s); background: transparent; color: var(--color-ink-soft); font: inherit;
  font-size: 13px; text-align: left; cursor: pointer;
}
.language-switcher__option:hover { background: var(--color-surface-alt); color: var(--color-ink); }
.language-switcher__option.is-active { background: var(--color-brand-soft); color: var(--color-brand); font-weight: 600; }

@media (max-width: 760px) {
  .header-inner { min-height: 56px; gap: var(--space-2); padding: 6px var(--space-3); }
  .product-mark__name { font-size: 16px; }
  .primary-nav { justify-content: flex-end; gap: 0; }
  .primary-nav__link { min-height: 44px; gap: 5px; padding: 8px 7px; font-size: 12px; }
  .nav-dropdown__panel { right: 0; left: auto; }
  .language-switcher__trigger { padding: 7px 8px; }
}

@media (max-width: 520px) {
  .header-inner { grid-template-columns: 1fr auto; gap: 2px; padding-bottom: 8px; }
  .product-mark { padding: 4px 7px; }
  .primary-nav { grid-column: 1 / -1; grid-row: 2; justify-content: flex-start; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
  .language-switcher { grid-column: 2; grid-row: 1; }
  .primary-nav::-webkit-scrollbar { display: none; }
}