.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color var(--transition-slow), padding var(--transition-slow);
  padding: var(--spacing-lg) 0;
  background-color: transparent;
}

.header.scrolled {
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--spacing-md) 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-ivory);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-links a {
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.mobile-toggle {
  display: none;
  color: var(--color-ivory);
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-primary-light);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    transform: translateY(-150%);
    opacity: 0;
    transition: all var(--transition-slow);
    z-index: -1;
    border-bottom: 1px solid var(--glass-border);
    visibility: hidden;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}