.header-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 28px);
}
.header-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.header-link[aria-current="page"] {
  color: var(--tm-deep);
  text-decoration: underline;
  text-underline-offset: 6px;
}
a:focus-visible {
  outline: 2px solid var(--tm-deep);
  outline-offset: 5px;
}
.site-header--floating {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  padding: 10px 0;
  padding-top: max(10px, env(safe-area-inset-top));
  background: var(--tm-canvas);
  border-bottom: 1px solid var(--tm-line);
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform 240ms cubic-bezier(.22, 1, .36, 1), visibility 0s 240ms;
}
.site-header--floating.is-visible {
  transform: translateY(0);
  visibility: visible;
  transition-delay: 0s;
}
section[id] { scroll-margin-top: 88px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .site-header--floating { transition: none; }
}