/* Header and its bars are one deep teal block; white nav text, white Follow button, no hover change */
.brand-bar { height: 16px; background: var(--ink); }

.site-header {
  background: var(--ink);
  padding: 12px 0;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
}
.wordmark { display: inline-flex; align-items: center; }
.wordmark img { width: auto; height: 50px; display: block; }

.main-nav {
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
  list-style: none;
}
.main-nav a {
  display: inline-flex; align-items: center;
  min-height: var(--target); padding: 6px 14px;
  color: var(--on-dark); text-decoration: none; font-weight: 500; font-size: 1.22rem;
  border-radius: var(--radius);
}
.main-nav a:hover { background: rgba(255, 255, 255, 0.12); color: var(--on-dark); }
.main-nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 2px; }
.main-nav .btn-follow {
  background: var(--surface); color: var(--ink); margin-left: 8px; padding: 6px 20px;
}
.main-nav .btn-follow:hover { background: var(--surface); color: var(--ink); }

/* Three-bar toggle (js/header-nav.js reveals it; hidden attribute keeps it out of no-JS pages) */
.nav-toggle {
  display: none; align-items: center; gap: 10px;
  min-height: var(--target); padding: 6px 12px;
  background: none; border: 2px solid rgba(255, 255, 255, 0.6); border-radius: var(--radius);
  color: var(--on-dark); font: inherit; font-weight: 500; font-size: 1.22rem; cursor: pointer;
}
.nav-toggle:focus-visible { outline: 3px solid var(--on-dark); outline-offset: 2px; }
.nav-toggle-bars { display: inline-flex; flex-direction: column; gap: 5px; width: 24px; }
.nav-toggle-bars span { display: block; height: 3px; border-radius: 2px; background: currentColor; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (max-width: 860px) {
  .has-nav-toggle .nav-toggle:not([hidden]) { display: inline-flex; }
  .has-nav-toggle .main-nav { display: none; }
  .has-nav-toggle .main-nav.is-open { display: flex; }
  /* Even rhythm: 12px header padding above the logo row, 12px gap, 12px below the divider, 12px under the last item */
  .header-inner { gap: 12px; }
  .main-nav.is-open {
    flex-direction: column; align-items: stretch; gap: 2px;
    width: 100%; padding-top: 12px; border-top: 1px solid rgba(255, 255, 255, 0.2);
  }
  .main-nav.is-open a { width: 100%; }
  .main-nav.is-open .btn-follow { margin: 8px 0 0; justify-content: center; }
  .site-header nav { flex-basis: 100%; }
}
@media (max-width: 600px) {
  .wordmark img { height: 40px; }
}
/* Narrow phones: bars only, so logo and toggle share one row instead of wrapping */
@media (max-width: 480px) {
  .nav-toggle { padding: 6px 10px; }
  .nav-toggle-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}