.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  color: var(--color-white);
}

.topbar {
  border-bottom: 1px solid rgba(245, 245, 242, 0.08);
  background: var(--color-black);
  color: var(--color-gray);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.topbar__inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 0.65rem;
}

.nav-shell {
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background-color 240ms ease, border-color 240ms ease, backdrop-filter 240ms ease;
}

.site-header.is-scrolled .nav-shell {
  border-color: rgba(245, 245, 242, 0.13);
  background: rgba(8, 8, 8, 0.82);
  backdrop-filter: blur(16px);
}

.nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 5.5rem;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  justify-self: start;
  width: 8.2rem;
  height: 3.6rem;
}

.brand img,
.footer__brand img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav__menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.25rem, 2.2vw, 2.5rem);
}

.nav__menu a,
.nav__contact {
  position: relative;
  color: var(--color-gray);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.nav__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 1.4rem;
}

.language-switcher {
  position: relative;
  display: flex;
  align-items: center;
  width: 6rem;
  min-width: 6rem;
  border-bottom: 1px solid rgba(245, 245, 242, 0.28);
}

.language-switcher__select {
  width: 100%;
  padding: 0.2rem 0.85rem 0.2rem 0.05rem;
  appearance: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-white);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.language-switcher__select:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

.language-switcher__select option {
  background: var(--color-black-secondary);
  color: var(--color-white);
}

.language-switcher__chevron {
  position: absolute;
  right: 0.05rem;
  bottom: 0.16rem;
  color: var(--color-gold);
  font-size: 0.72rem;
  line-height: 1;
  pointer-events: none;
}

.nav__menu a::after {
  position: absolute;
  right: 0;
  bottom: -0.55rem;
  left: 0;
  height: 1px;
  background: var(--color-gold);
  content: '';
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease-premium);
}

.nav__menu a:hover,
.nav__menu a:focus-visible,
.nav__contact:hover,
.nav__contact:focus-visible {
  color: var(--color-white);
}

.nav__menu a:hover::after,
.nav__menu a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__contact {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-white);
}

.nav__contact > span[aria-hidden="true"] {
  color: var(--color-gold);
  font-size: 1rem;
  font-weight: 400;
}

.nav__toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.7rem;
  background: transparent;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-white);
  transition: transform 220ms ease, opacity 220ms ease;
}

.nav__toggle span + span {
  margin-top: 0.45rem;
}

.site-header.menu-open .nav__toggle span:first-child {
  transform: translateY(0.23rem) rotate(45deg);
}

.site-header.menu-open .nav__toggle span:last-child {
  transform: translateY(-0.23rem) rotate(-45deg);
}