body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background-color: #f5f5f5;
  padding: 20px;
}
ul {
  list-style: none;
  padding-left: 0;
}
li {
  margin-bottom: 10px;
}
a {
  text-decoration: none;
  color: #0077cc;
}
a:hover {
  text-decoration: underline;
}
h3 {
  text-align: center;
}
h4 {
  text-align: center;
}