/* Header Styles */

header {
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  border-bottom: 1px solid var(--border-color);
}

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

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

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

.header-container nav {
  margin-left: var(--spacing-xl);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
  padding: 0;
  margin: 0;
}

.header-nav li {
  margin: 0;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.1);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-sm);
}

@media (max-width: 1200px) {
  .header-container {
    justify-content: space-between;
  }
  
  .header-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: var(--z-dropdown);
  }
  
  .header-nav.open {
    transform: translateX(0);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-md);
    width: 100%;
  }
}