/* Header styles scoped to .site-header; builds on base.css */

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -40px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: var(--z-index-fixed);
  transition: top var(--transition-base);
}
.skip-link:focus { top: var(--space-4); }

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-index-sticky);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-primary);
}
.brand-text {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-xl);
  letter-spacing: var(--letter-spacing-tight);
}
.brand:hover { color: var(--color-primary); }

/* Navigation */
.primary-nav { display: block; }
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-link {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  padding: var(--space-2) 0;
}
.nav-link:hover { color: var(--color-primary); }

/* Mobile menu toggle - hidden by default, shown when JS present on small screens */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
}
.menu-toggle:hover { background-color: var(--color-neutral-100); }
.menu-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.icon-close { display: none; }
.menu-toggle[aria-expanded="true"] .icon-menu { display: none; }
.menu-toggle[aria-expanded="true"] .icon-close { display: inline; }

/* Overlay for mobile menu */
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(44,42,36,0.4);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-index-sticky) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}

/* JS-enhanced responsive behavior */
.has-js .menu-toggle { display: none; }
@media (max-width: 1024px) {
  .has-js .menu-toggle { display: inline-flex;        z-index: 9999; }
  .has-js .primary-nav {
    display: none;
    position: fixed;
    left: 0; right: 0; top: 64px; /* aligns with header height */
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-6) var(--space-6) var(--space-8);
    z-index: 9998;
  }
  .has-js .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
  body.menu-open .primary-nav { display: block; animation: menuSlideDown var(--transition-slower); }
  body.menu-open .menu-overlay { opacity: 1; }
  body.menu-open .menu-overlay[hidden] { display: block; }
  .brand-wrap { z-index: 9999;}
}

@keyframes menuSlideDown {
  from { transform: translateY(-8px); opacity: 0.98; }
  to { transform: translateY(0); opacity: 1; }
}