.site-nav {
  background: rgba(17, 24, 39, 0.92);
  color: var(--color-text);
  box-shadow: 0 1px 0 var(--color-border), var(--shadow-md);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.site-nav .container { display: flex; flex-wrap: wrap; gap: 0; }
.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  font-weight: 500;
  font-size: 0.95rem;
  display: inline-block;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.site-nav a:hover { color: var(--color-text); background: rgba(6, 182, 212, 0.08); }
.site-nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background: rgba(6, 182, 212, 0.06);
}

.site-nav .block-nav-list {
  padding: 0;
  background: transparent;
  border: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
.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: 500;
  border-radius: 0;
  font-size: 1rem;
  border-bottom: 2px solid transparent;
}
.site-nav .block-nav-list a:hover { background: rgba(6, 182, 212, 0.08); color: var(--color-text); }
.site-nav .block-nav-list .active > a, .site-nav .block-nav-list .active > span {
  color: var(--color-primary);
  background: rgba(6, 182, 212, 0.06);
  border-bottom: 2px solid var(--color-primary);
  border-radius: 0;
}

.layout-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-block: var(--space-12);
}
@media (min-width: 900px) {
  .layout-main.has-sidebar {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
  .layout-main.has-sidebar > main { order: 1; }
  .layout-main.has-sidebar > aside { order: 2; }
}
main { min-width: 0; }
aside { min-width: 0; }
aside details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
aside details > summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
aside details > summary::-webkit-details-marker { display: none; }
aside details > summary::after { content: "+"; font-size: 1.25rem; color: var(--color-primary); }
aside details[open] > summary::after { content: "−"; }
aside details[open] > summary { margin-bottom: 0; }
aside details > div { padding: var(--space-4); }
@media (min-width: 900px) {
  aside details > summary { display: none; }
  aside details[open] > summary { display: none; }
}