body {
  font-family: sans-serif;
  padding: 2rem;
  background: #f4f4f4;
  color: #333;
}
h1 {
  text-align: center;
}
#nav-switcher {
  text-align: center;
  margin-bottom: 1rem;
}
.category {
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  background: white;
}
.category h2 {
  font-size: 1rem;
  padding: 0.8rem;
  margin: 0;
  background: #eee;
  cursor: pointer;
}
ul {
  list-style: none;
  padding: 0.5rem 1rem;
  margin: 0;
  display: none;
}
li {
  margin-bottom: 0.5rem;
}
a {
  background: #0077cc;
  color: white;
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: 2px;
  display: inline-block;
}

#search-box {
  text-align: center;
  margin-bottom: 1.5rem;
}
#search {
  width: 90%;
  max-width: 500px;
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
}
#no-results {
  text-align: center;
  font-style: italic;
  color: #777;
}