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

header {
  background-color: #333;
  color: #fff;
  padding: 10px;
}

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

nav ul li {
  display: inline-block;
  margin-right: 10px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
}

section {
  padding: 50px;
}

#home {
  background-color: #f9f9f9;
}

#services {
  background-color: #e0e0e0;
}

#about {
  background-color: #f9f9f9;
}

footer {
  background-color: #333;
  color: #fff;
  padding: 10px;
  text-align: center;
}