.site-header {
  --header-bg: rgba(10, 10, 10, 0.85);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1002;
  background: transparent;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: -1;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-accent);
}

.header-mobile-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

.desktop-nav {
  display: none;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 300px;
  background: var(--color-surface);
  background-color: var(--color-surface);
  z-index: 1001;
  padding: 100px 28px 40px;
  transform: translateX(100%);
  transition: transform 0.35s ease;
  display: flex;
  flex-direction: column;
  gap: 32px;
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
  border-left: 1px solid var(--color-border);
}

.mobile-nav.active {
  transform: translateX(0);
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.nav-list a {
  font-size: 1.25rem;
  font-weight: 500;
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav .header-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: auto;
}

.lang-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.9rem;
}

.lang-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-link-mobile {
  width: auto;
  height: auto;
  border-radius: 0;
  border: none;
  padding: 8px;
}

@media (min-width: 1024px) {
  .header-mobile-actions {
    display: none;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-nav {
    display: none;
  }

  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .desktop-nav .nav-list {
    flex-direction: row;
    gap: 28px;
  }

  .desktop-nav .nav-list a {
    font-size: 0.95rem;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
  }

  .desktop-nav .nav-list a:hover {
    border-bottom-color: var(--color-accent);
  }
}