/* ============================================
   HEADER VARIATION 4: Corporate Split Layout
   Professional two-tier navigation
   ============================================ */

.navbar-v4 {
  background-color: var(--background);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

/* Top Bar - Contact & CTA */
.navbar-v4 .navbar-top {
  background-color: var(--text-primary);
  padding: 0.6rem 0;
  border-bottom: 3px solid var(--primary-color);
}

.navbar-v4 .navbar-top-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-v4 .navbar-top-info {
  display: flex;
  gap: var(--spacing-xl);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
}

.navbar-v4 .navbar-top-info span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--transition-fast);
}

.navbar-v4 .navbar-top-info span:hover {
  color: white;
}

.navbar-v4 .navbar-top-cta {
  font-size: 0.85rem;
  color: white;
  font-weight: 600;
  background: linear-gradient(90deg, var(--secondary-color), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Main Navigation */
.navbar-v4 .navbar-main {
  padding: var(--spacing-md) 0;
  background-color: white;
}

.navbar-v4 .navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Brand Section */
.navbar-v4 .navbar-brand-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.navbar-v4 .navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-color);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.navbar-v4 .navbar-brand:hover {
  color: var(--primary-dark);
}

.navbar-v4 .navbar-separator {
  width: 2px;
  height: 35px;
  background: linear-gradient(to bottom, transparent, var(--border-color), transparent);
}

.navbar-v4 .navbar-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 220px;
  line-height: 1.4;
  font-weight: 500;
}

/* Navigation Menu */
.navbar-v4 .navbar-menu {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
  align-items: center;
  margin: 0;
}

.navbar-v4 .navbar-link {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: var(--spacing-xs) 0;
  transition: all var(--transition-fast);
  position: relative;
}

.navbar-v4 .navbar-link::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transition: width var(--transition-base);
}

.navbar-v4 .navbar-link:hover::before,
.navbar-v4 .navbar-link.active::before {
  width: 100%;
}

.navbar-v4 .navbar-link:hover,
.navbar-v4 .navbar-link.active {
  color: var(--primary-color);
}

.navbar-v4 .btn-primary {
  padding: 0.7rem 1.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .navbar-v4 .navbar-description {
    display: none;
  }
  
  .navbar-v4 .navbar-separator {
    display: none;
  }
  
  .navbar-v4 .navbar-menu {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .navbar-v4 .navbar-top-info span:first-child {
    display: none;
  }
  
  .navbar-v4 .navbar-top-cta {
    font-size: 0.8rem;
  }
  
  .navbar-v4 .navbar-brand {
    font-size: 1.5rem;
  }
  
  .navbar-v4 .navbar-menu {
    display: none;
  }
  
  /* Show simplified menu for mobile */
  .navbar-v4 .btn-primary {
    font-size: 0.8rem;
    padding: 0.6rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .navbar-v4 .navbar-top {
    padding: 0.5rem 0;
  }
  
  .navbar-v4 .navbar-top-content {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  
  .navbar-v4 .navbar-main {
    padding: var(--spacing-sm) 0;
  }
}