body {
  font-family: sans-serif;
  background-color: #ffffff;
}

h1 {
  font-size: 2em;
  text-align: center;
}

header {
  background-color: #000000;
  color: #ffffff;
  padding: 1em;
}

nav {
  float: right;
}

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

main {
  margin-top: 2em;
}

section {
  margin-bottom: 2em;
}

#home {
  background-color: #00ff00;
}

#about {
  background-color: #ffff00;
}

#contact {
  background-color: #ff0000;
}

footer {
  padding: 1em;
  text-align: center;
  background-color: #000000;
  color: #ffffff;
}