body {
  font-family: Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: #333;
}

h1, h2, h3 {
  font-weight: bold;
  margin-bottom: 1em;
}

a {
  color: #0099cc;
  text-decoration: none;
}

header {
  background-color: #f2f2f2;
  padding: 1em;
  text-align: center;
}

header h1 {
  font-size: 36px;
  margin: 0;
}

nav {
  display: flex;
  justify-content: center;
  margin-bottom: 2em;
}

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

nav li {
  margin-right: 1em;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2em;
}

footer {
  background-color: #f2f2f2;
  padding: 1em;
  text-align: center;
  margin-top: 2em;
}