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

header {
  background-color: #f0f0f0;
  padding: 10px;
  text-align: center;
}

nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #333;
}

main {
  padding: 20px;
}

section {
  margin-bottom: 20px;
  border: 1px solid #ccc;
  padding: 10px;
}

footer {
  text-align: center;
  padding: 10px;
  background-color: #f0f0f0;
  position: fixed;
  bottom: 0;
  width: 100%;
}