/* Site header + navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: var(--border-width) solid var(--color-border);
}
.site-header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-3) var(--gutter-mobile);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
}
@media (min-width: 768px) {
  .site-header__inner { padding: var(--space-4) var(--gutter-desktop); }
}

.site-header__logo img { height: 80px; width: auto; }

.site-nav { display: none; }
@media (min-width: 900px) {
  .site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .site-nav a {
    color: var(--color-text);
    font-weight: var(--weight-medium);
    font-size: var(--text-support);
  }
  .site-nav a:hover { color: var(--color-navy-900); text-decoration: none; }
  .site-nav a[aria-current="page"] {
    color: var(--color-navy-900);
    font-weight: var(--weight-semibold);
  }
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile nav toggle — progressive enhancement; nav is a normal in-flow
   list without JS, JS only adds the collapse/expand behavior */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
}
.nav-toggle svg { width: 20px; height: 20px; }

.mobile-nav {
  display: none;
  border-top: var(--border-width) solid var(--color-border);
  background: var(--color-white);
}
.mobile-nav.is-open { display: block; }
@media (min-width: 900px) {
  .mobile-nav { display: none !important; }
}
.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: var(--space-4) var(--gutter-mobile);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-2);
  color: var(--color-text);
  font-weight: var(--weight-medium);
  min-height: 44px;
}
.mobile-nav a[aria-current="page"] { color: var(--color-navy-900); font-weight: var(--weight-semibold); }