body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
}

nav {
  background-color: #333;
  color: white;
  padding: 10px 0;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
}

nav li {
  margin: 0 15px;
}

nav a {
  color: white;
  text-decoration: none;
}

#app {
  padding: 20px;
}

h1 {
  margin-bottom: 10px;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin-bottom: 5px;
}

a {
  text-decoration: none;
  color: #007bff;
}