/* Header Styles */
.header {
  background: var(--color-bg-primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
}

.header-logo img {
  height: 40px;
  width: auto;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-left: var(--spacing-xl);
}

.header-nav-link {
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-nav-link:hover {
  color: var(--color-primary);
  background: var(--color-bg-secondary);
}

.header-nav-link.active {
  color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  cursor: pointer;
  padding: var(--spacing-sm);
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

@media (max-width: 1200px) {
  .mobile-menu-toggle {
    display: flex;
  }
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-bg-primary);
  z-index: var(--z-modal);
  padding: var(--spacing-3xl) var(--spacing-lg);
  overflow-y: auto;
}

.mobile-nav.active {
  display: block;
}

.mobile-nav-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  cursor: pointer;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-3xl);
}

.mobile-nav-link {
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
  background: var(--color-bg-secondary);
  color: var(--color-primary);
}

@media (max-width: 1200px) {
  .header-nav {
    display: none;
  }
}

@media (max-width: 767px) {
  body.mobile-menu-open {
    overflow: hidden;
  }
}