header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
  padding: 0 40px;
  border-bottom: 1px solid #f0f0f0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  z-index: 10;
}

.logo {
  font-weight: 600;
  font-size: 1rem;
  color: #1a1a1a;
  letter-spacing: -0.01em;
}

.header-nav {
  display: flex;
  gap: 28px;
  width: 100%;
  justify-content: flex-end;
}

.header-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  color: #666;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: #1a1a1a;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 8px;
  border-left: 1px solid #e8e8e8;
  padding-left: 16px;
}

.lang-btn {
  background: none;
  border: none;
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #bbb;
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 4px;
  transition: color 0.2s;
}

.lang-btn.active {
  color: #1a1a1a;
}

.lang-btn:hover:not(.active) {
  color: #777;
}

@media (max-width: 560px) {
  .header-nav {
  display: flex;
  gap: 28px;
}
}