/* Estilos para os subgrupos na navegação */
.nav-group-subsection {
  margin-left: 0;
  margin-bottom: 0.5em;
}

.nav-group-subsection details {
  margin: 0;
}

.nav-group-subsection details summary {
  cursor: pointer;
  list-style: none;
  outline: none;
}

.nav-group-subsection details summary::-webkit-details-marker {
  display: none;
}

.nav-group-subsection details summary::before {
  content: '▼';
  display: inline-block;
  width: 1em;
  font-size: 0.7em;
  transition: transform 0.2s;
}

.nav-group-subsection details:not([open]) summary::before {
  transform: rotate(-90deg);
}

.nav-group-subsection-title {
  font-size: 0.9em;
  font-weight: 600;
  margin: 0.3em 0;
  padding: 0.3em 0.5em;
  color: #555;
  background: #f5f5f5;
  border-radius: 4px;
}

.nav-group-subsection-title a {
  color: #555;
  text-decoration: none;
  margin-left: 0.3em;
}

.nav-group-subsection-title:hover {
  background: #ebebeb;
}

.nav-group-subsection-title a:hover {
  color: #000;
}

.nav-group-subsection-items {
  list-style: none;
  padding-left: 2em;
  margin: 0.3em 0;
  max-height: 400px;
  overflow-y: auto;
}

.nav-group-subsection-items li {
  margin: 0.15em 0;
}

.nav-group-subsection-items a {
  font-size: 0.85em;
  color: #666;
  text-decoration: none;
  display: block;
  padding: 0.2em 0.5em;
  border-radius: 3px;
  transition: all 0.2s;
  word-wrap: break-word;
}

.nav-group-subsection-items a:hover {
  color: #000;
  background: #f0f0f0;
}

/* Estilo para os cabeçalhos de subgrupo no conteúdo */
.group-subheading {
  font-size: 1.5em;
  font-weight: 600;
  margin-top: 3em;
  margin-bottom: 1.5em;
  padding: 0.8em 1em;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white !important;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.group-subheading:first-of-type {
  margin-top: 1em;
}