/* Header Component Styles */
.site-header {
  background-color: var(--color-primary);
  color: var(--color-white);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-md);
}

.site-header.scrolled {
  background-color: var(--color-primary-dark);
  padding: var(--spacing-sm) 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  transition: padding var(--transition-medium);
}

.site-title {
  font-size: 1.5rem;
  margin: 0;
  color: var(--color-white);
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
  position: relative;
  transition: opacity var(--transition-fast);
  padding: var(--spacing-xs) 0;
}

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

.nav-link:hover,
.nav-link:focus {
  opacity: 0.9;
}

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

.nav-link.active {
  color: var(--color-accent);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-xs);
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger {
  width: 25px;
  height: 3px;
  background-color: var(--color-white);
  transition: all var(--transition-fast);
  transform-origin: center;
}

.mobile-menu-toggle.active .hamburger:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active .hamburger:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

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

  .main-nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    transform: translateY(-100vh);
    transition: transform var(--transition-medium);
    box-shadow: var(--shadow-lg);
  }

  .main-nav.active {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    padding: var(--spacing-xl) 0;
    gap: var(--spacing-md);
  }

  .nav-link {
    font-size: 1.125rem;
    padding: var(--spacing-sm) 0;
  }
}