.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 10px 0;
  background:
    linear-gradient(
      180deg,
      rgba(14, 21, 31, 0.92) 0%,
      rgba(10, 16, 24, 0.82) 100%
    ),
    linear-gradient(
      90deg,
      rgba(200, 224, 244, 0.07) 0%,
      rgba(255, 255, 255, 0.00) 38%,
      rgba(255, 255, 255, 0.00) 100%
    );
  backdrop-filter: blur(20px) saturate(1.12);
  -webkit-backdrop-filter: blur(20px) saturate(1.12);
  border-bottom: 1px solid rgba(200, 224, 244, 0.10);
  box-shadow:
    0 12px 30px rgba(0, 0, 0, 0.18),
    0 1px 0 rgba(255, 255, 255, 0.03) inset;
}

.nav-shell {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 24px;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 108px;
  height: 108px;
  object-fit: contain;
  flex: 0 0 108px;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
}

.nav-menu a {
  position: relative;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--transition);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 1px;
  width: 100%;
  height: 1px;
  background: #7fb1e8;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: #a9cdf3;
}

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

.nav-cta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-call {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(180deg, #1f3f68 0%, #17314f 100%);
  color: #f7fbff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition:
    transform var(--transition),
    background var(--transition),
    box-shadow var(--transition);
  box-shadow: 0 12px 28px rgba(21, 39, 61, 0.20);
}

.nav-call:hover {
  transform: translateY(-1px);
  background: linear-gradient(180deg, #29507f 0%, #1d3d61 100%);
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  background: transparent;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: #f5f7fb;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.is-active span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.is-active span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  margin-top: 14px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(10, 10, 10, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 14px;
  font-weight: 700;
  color: #f5f7fb;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.mobile-menu-cta {
  color: #8fc0f4 !important;
}

.mobile-menu.is-open {
  display: block;
}

@media (max-width: 1080px) {
  .nav-shell {
    grid-template-columns: auto 1fr auto;
  }

  .nav-menu {
    gap: 18px;
  }

  .nav-call {
    padding: 0 16px;
  }
}

@media (max-width: 920px) {
  .nav-shell {
    grid-template-columns: auto 1fr auto;
    gap: 16px;
    min-height: 72px;
  }

  .nav-menu,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    justify-self: end;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 8px 0;
  }

  .brand-logo {
    width: 84px;
    height: 84px;
    flex-basis: 84px;
  }

  .mobile-menu {
    padding: 16px;
    border-radius: 18px;
  }

  .mobile-menu a {
    font-size: 14px;
  }
}

.nav-call {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.nav-call__icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 16px;
}

.nav-call__icon svg {
  width: 16px;
  height: 16px;
  display: block;
}

.nav-lang {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 18px;
}

.nav-lang__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 10px;
  border-radius: 999px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    color var(--transition);
}

.nav-lang__item span {
  font-size: 14px;
  line-height: 1;
}

.nav-lang__item small {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.nav-lang__item:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(200, 224, 244, 0.22);
  color: #ffffff;
}

.nav-lang__item.is-active {
  background: rgba(200, 224, 244, 0.10);
  border-color: rgba(200, 224, 244, 0.22);
  color: #ffffff;
}

.mobile-menu-langs {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.mobile-menu-langs a {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  font-weight: 600;
}

@media (max-width: 1100px) {
  .nav-lang {
    display: none;
  }
}