.site-nav {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 200;
}
.site-nav .container { display: flex; align-items: center; gap: 0; }
.site-nav-links { display: flex; flex-wrap: wrap; flex: 1; justify-content: center; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
  font-size: 0.9rem;
}
.nav-toggle:hover { border-color: var(--color-accent); }
.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}
.nav-toggle-icon { position: relative; }
.nav-toggle-icon::before, .nav-toggle-icon::after { content: ""; position: absolute; left: 0; }
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { top: 0; transform: rotate(-45deg); }

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  font-weight: 400;
  font-size: 0.9rem;
  display: inline-block;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease);
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a[aria-current="page"] { color: var(--color-text); border-bottom-color: var(--color-accent); }

.site-nav .block-nav-list { padding: 0; background: transparent; border: 0; display: flex; flex-wrap: wrap; gap: 0; width: 100%; justify-content: center; }
.site-nav .block-nav-list h2, .site-nav .block-nav-list h3 { display: none; }
.site-nav .block-nav-list ul { display: contents; }
.site-nav .block-nav-list ul ul { display: none; }
.site-nav .block-nav-list li { list-style: none; }
.site-nav .block-nav-list a, .site-nav .block-nav-list span {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 400;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
}
.site-nav .block-nav-list a:hover { color: var(--color-text); }
.site-nav .block-nav-list .active > a, .site-nav .block-nav-list .active > span {
  color: var(--color-text);
  border-bottom: 2px solid var(--color-accent);
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-nav .container { flex-wrap: wrap; padding-block: var(--space-2); justify-content: space-between; }
  .site-nav-links { display: none; flex-direction: column; flex-basis: 100%; }
  .site-nav-links.is-open { display: flex; }
  .site-nav .block-nav-list { flex-direction: column; width: 100%; justify-content: flex-start; }
  .site-nav .block-nav-list a, .site-nav .block-nav-list span { padding: var(--space-3); width: 100%; border-bottom: 1px solid var(--color-border); }
}
@media (scripting: none) and (max-width: 900px) {
  .site-nav-links { display: flex; }
  .nav-toggle { display: none; }
}

.layout-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-block: var(--space-16);
}
main { min-width: 0; }