* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background-color: #05f5f5;
}

.navigation-container {
  padding: 20px;
}

h2 {
  color: #333;
  margin-bottom: 20px;
}

ul {
  list-style-type: none;
  padding-left: 10px;
}

li {
  margin-bottom: 15px;
}

a {
  text-decoration: none;
  color: #333;
  padding: 10px 15px;
  display: block;
  border-radius: 4px;
  transition: background-color 0.3s;
}

a:hover {
  background-color: #e0e0e0;
}

a.active {
  background-color: #4CAF50;
  color: white;
}