body {
  font-family: 'Roboto', sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

header {
  background-color: #f9f9f9;
  box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
  padding: 10px;
}

nav ul {
  margin: 0;
  padding: 0;
}

nav li {
  display: inline-block;
  margin-right: 20px;
}

nav a {
  color: #333;
  text-decoration: none;
}

main {
  text-align: center;
  padding: 50px;
}

h1 {
  font-size: 36px;
  margin-bottom