/* Header Specific Styles */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  z-index: 1000;
  font-weight: var(--font-weight-medium);
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-text-inverse);
  outline-offset: -2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: rgba(250, 249, 246, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-neutral-200);
  transition: box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--color-neutral-200);
}

.mobile-menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.primary-navigation {
  display: flex;
  align-items: center;
}

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

.nav-list a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-list a:hover {
  color: var(--color-primary-dark);
}

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

.nav-list a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

@media (max-width: 767px) {
  .mobile-menu-toggle {
    display: flex;
    z-index: calc(var(--z-sticky) + 10);
  }
  
  .primary-navigation {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(75vw, 300px);
    background-color: var(--color-surface);
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 6rem;
    padding-left: var(--space-8);
    padding-right: var(--space-8);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-xl);
    border-left: 1px solid var(--color-neutral-200);
  }
  
  .primary-navigation.is-open {
    transform: translateX(0);
    height: 100vh;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    width: 100%;
  }
  
  .nav-list a {
    font-size: var(--text-lg);
    padding: var(--space-2) 0;
    width: 100%;
    display: block;
  }
  
  .nav-list a::after {
    bottom: -2px;
  }
  
  body.menu-open {
    overflow: hidden;
  }
  
  body.menu-open::before {
    content: '';
    position: fixed;
    inset: 0;
    background-color: rgba(44, 44, 44, 0.4);
    z-index: calc(var(--z-sticky) - 1);
    backdrop-filter: blur(2px);
  }
}