.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  height: 80px;
  background: var(--bg-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  border-bottom: 1px solid transparent;
}

.header-nav.scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-section {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.logo-text {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-teal-600);
  margin: 0;
  letter-spacing: -0.02em;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.desktop-nav {
  display: none;
  gap: 0.5rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-link {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: color 0.2s ease;
  border-radius: 0.5rem;
}

.nav-link:hover {
  color: var(--accent-teal-600);
  background: var(--accent-teal-100);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

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

.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
  gap: 0.5rem;
  border-top: 1px solid var(--border-light);
  margin-top: 1rem;
}

.mobile-nav-link {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
  border-radius: 0.5rem;
}

.mobile-nav-link:hover {
  color: var(--accent-teal-600);
  background: var(--accent-teal-100);
}