body {
  display: flex;
  margin: 0;
  background-color: #1e1e1e;
  color: #e0e0e0;
  font-family: system-ui, sans-serif;
}

#sidebar {
  width: 300px;
  background-color: #2a2a2a;
  padding: 1rem;
  overflow-y: auto;
  height: 100vh;
  border-right: 1px solid #444;
}

#filter {
  width: 95%;
  padding: 0.4rem;
  margin-bottom: 0.8rem;
  background: #3a3a3a;
  border: none;
  color: #fff;
  border-radius: 6px;
}

.menu-item {
  margin: 0.4rem 0;
}

.menu-item.level2 a { 
  color: #61dafb; 
  text-decoration: none;
}

.menu-item.level3 a { 
  color: #9cdcfe; 
  text-decoration: none;
  padding-left: 1rem;
  display: block;
}

#content {
  padding: 2rem;
  flex-grow: 1;
  overflow-y: auto;
}

#top-link {
  display: block;
  margin-bottom: 1rem;
  color: #61dafb;
  text-decoration: none;
  font-weight: 600;
}

#top-link:hover {
  text-decoration: underline;
}