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

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
}

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

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

nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 1;
}

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

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

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

.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) {
  .mobile-menu-toggle {
    display: block;
  }
  
  nav {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-base);
    z-index: var(--z-modal);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
  
  nav.active {
    left: 0;
  }
  
  .nav-menu {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-md);
    width: 100%;
  }
}