/* Header Styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-secondary);
  z-index: 100;
  transition: background-color var(--transition-normal);
}

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

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

.nav-brand {
  display: flex;
  align-items: center;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--font-size-lg);
  transition: color var(--transition-fast);
}

.brand-link:hover {
  color: var(--color-primary-light);
}

.brand-logo {
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.brand-link:hover .brand-logo {
  transform: scale(1.05);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  gap: var(--space-1);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  margin: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

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

.nav-link:hover::after {
  width: 100%;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.cta-button:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.cta-icon {
  transition: transform var(--transition-fast);
}

.cta-button:hover .cta-icon {
  transform: translateX(2px);
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.dropdown-icon {
  transition: transform var(--transition-fast);
}

.dropdown:hover .dropdown-icon,
.dropdown-toggle[aria-expanded="true"] .dropdown-icon {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 1000;
}

.dropdown:hover .dropdown-menu,
.dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-secondary);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    gap: var(--space-6);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--space-4);
  }

  .nav-cta {
    align-self: flex-start;
  }

  /* Mobile Dropdown */
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-accent);
    margin-top: var(--space-2);
    border-radius: var(--border-radius);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }

  .dropdown:hover .dropdown-menu,
  .dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
    max-height: 300px;
  }

  .dropdown-link {
    font-size: var(--font-size-base);
    padding: var(--space-3) var(--space-4);
  }
}