body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

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

header h1 {
margin: 0;
}

nav {
background-color: #333;
color: #fff;
padding: 0.5em;
}

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

nav li {
display: inline-block;
}

nav a {
color: #fff;
text-decoration: none;
padding: 0.5em;
}

main {
margin: 1em;
}

section {
padding: 1em;
margin-bottom: 1em;
}

section h2 {
margin-top: 0;
}

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