.app-header {
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-lg) var(--spacing-3xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-md);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--color-primary);
}

.logo-text h1 {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-2xl);
  letter-spacing: -0.02em;
  margin: 0;
}

.logo-text h1 span {
  color: var(--color-accent);
}

.logo-text p {
  font-size: var(--font-size-xs);
  color: var(--color-success);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: var(--spacing-xs) 0 0 0;
}

.header-nav {
  display: flex;
  gap: var(--spacing-sm);
}

.nav-item {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-success);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: 1px solid transparent;
}

.nav-item:hover {
  background-color: rgba(245, 200, 66, 0.1);
}

.nav-item.active {
  background-color: var(--color-accent);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: flex-start;
  }
  
  .header-nav {
    width: 100%;
  }
}