/* header.css - Modern responsive navigation */

.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: var(--transition-base);
}

.navbar {
  padding: var(--space-4) 0;
}

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

.nav-logo h1 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-logo i {
  font-size: var(--text-2xl);
  color: var(--secondary-500);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-2);
}

.nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  color: var(--gray-700);
  text-decoration: none;
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: var(--transition-colors);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-600);
  background: var(--primary-50);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--primary-500);
  border-radius: var(--radius-full);
}

/* Mobile Menu */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--space-2);
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--gray-700);
  margin: 3px 0;
  transition: var(--transition-fast);
  border-radius: var(--radius-full);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 80px;
    flex-direction: column;
    background: white;
    width: 100%;
    text-align: center;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--gray-200);
    padding: var(--space-4) 0;
    gap: 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-link {
    margin: var(--space-2) var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
}

/* Header scroll effect */
.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

/* Old styles removed - replaced with modern design */