.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: 80px;
  display: grid;
  grid-template-columns: minmax(170px, 1fr) auto minmax(170px, 1fr);
  align-items: center;
  gap: 24px;
  padding: 0 46px;
  background: rgba(247, 242, 234, 0.96);
  border-bottom: 1px solid rgba(8, 43, 73, 0.12);
  backdrop-filter: blur(18px);
  transition:
    background 0.35s ease,
    box-shadow 0.35s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 253, 248, 0.98);
  box-shadow: 0 12px 40px rgba(8, 43, 73, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 260px;
  max-width: 260px;
  height: 66px;
  overflow: hidden;
}

.brand img {
  width: 260px;
  height: auto;
  object-fit: contain;
  background: transparent;
}

.nav {
  position: fixed;
  top: 80px;
  right: 46px;
  z-index: 18;
  display: grid;
  width: min(620px, calc(100vw - 92px));
  padding: 30px 32px 34px;
  background: rgba(255, 253, 248, 0.96);
  border: 1px solid rgba(8, 43, 73, 0.14);
  box-shadow: 0 18px 50px rgba(8, 43, 73, 0.12);
  backdrop-filter: blur(18px);
  transform: translateY(-16px);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.24s ease,
    transform 0.24s ease;
}

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

.nav-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px 48px;
}

.nav-group {
  display: grid;
  align-content: start;
}

.nav-group-label {
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .2em;
}

.nav a {
  position: relative;
  color: var(--navy);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 11px 0;
  border-bottom: 1px solid rgba(8, 43, 73, 0.1);
}

.nav a:last-child {
  border-bottom: 0;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  min-width: 0;
}

.header-actions > .btn {
  display: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--navy);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.lang-switch button,
.hidden-ru {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  opacity: 0.54;
}

.lang-switch button.is-active,
.hidden-ru.is-active {
  opacity: 1;
  color: var(--gold);
}

.divider {
  width: 1px;
  height: 14px;
  background: rgba(8, 43, 73, 0.28);
}

.menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 78px;
  height: 42px;
  padding: 0 13px;
  border: 1px solid rgba(8, 43, 73, 0.24);
  background: rgba(255, 253, 248, 0.8);
  color: var(--navy);
  cursor: pointer;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.menu-button span,
.menu-button span::before,
.menu-button span::after {
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
  content: "";
  transition:
    transform 0.24s ease,
    opacity 0.24s ease;
}

.menu-button span::before {
  transform: translateY(-6px);
}

.menu-button span::after {
  transform: translateY(5px);
}

.menu-button.is-open span {
  background: transparent;
}

.menu-button b {
  font-weight: 400;
}

.menu-button.is-open span::before {
  background: var(--navy);
  transform: rotate(45deg);
}

.menu-button.is-open span::after {
  background: var(--navy);
  transform: translateY(-1px) rotate(-45deg);
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: 1fr auto;
    padding: 0 22px;
  }

  .nav {
    left: 0;
    right: 0;
    padding: 18px 22px 24px;
    border-bottom: 1px solid rgba(8, 43, 73, 0.12);
    border-left: 0;
    border-right: 0;
    transform: translateY(-16px);
  }

  .nav-groups {
    gap: 28px 36px;
  }

  .nav a {
    padding: 16px 0;
  }

  .header-actions .btn {
    display: none;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 88px;
    row-gap: 0;
    padding-top: 7px;
    padding-bottom: 7px;
  }

  .brand {
    width: 155px;
    max-width: 155px;
    height: 48px;
  }

  .brand img {
    width: 155px;
  }

  .header-actions { display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto; gap: 3px 10px; }
  .lang-switch { grid-column: 1 / -1; grid-row: 2; justify-self: end; gap: 6px; font-size: 11px; letter-spacing: 1.6px; }
  .menu-button { grid-column: 2; grid-row: 1; min-width: 68px; padding: 0 10px; gap: 8px; }

  .nav {
    top: 88px;
  }

  .nav-groups {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

@media (min-width: 1081px) {
  .site-header {
    grid-template-columns: minmax(210px, 1fr) auto;
  }

  .nav {
    top: 80px;
    right: 46px;
  }

  .menu-button {
    display: inline-flex;
  }
}