body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background-color: #ff6347;
  color: white;
  padding: 20px;
  text-align: center;
}
ul {
  list-style: none;
  padding: 0;
}
li {
  margin: 10px;
  padding: 10px;
  background-color: #f3f3f3;
  border: 1px solid #ddd;
}
a {
  color: #000;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}