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

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

h1 {
  margin: 0;
}

main {
  padding: 20px;
}

section {
  border: 1px solid #ccc;
  padding: 10px;
}

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